I.—Phænogamous or Flowering Plants (part 4)

The oil of ajowan, from which the thymol has been removed, boils at about 172°, and contains cymene (or cymol), C₁₀H₁₄, which, with concentrated sulphuric acid, affords cymen-sulphonic acid, C₁₀H₁₃SO₂OH. The latter is not very readily crystallizable, but forms crystallized salts with baryum, calcium, zinc, lead, which are abundantly soluble in water. In the oil of ajowan no constituent of the formula C₁₀H₁₆ appears to be present; mixed with alcohol and nitric acid (see p. 279) it at least produces no crystals of terpin.

The residual portions of the oil, from which the cymene has been distilled, contains another substance of the phenol class different from thymol.

We have found that neither the thymol nor the liquid part of ajowan oil possesses any rotatory power.

Uses—Ajowan is much used by the natives of India as a condiment. The distilled water which has been introduced into the Pharmacopœia of India, is reputed to be carminative, and a good vehicle for nauseous medicines. It has a powerful burning taste, and would seem to require dilution. The volatile oil may be used in the place of oil of thyme, which it closely resembles.

Ajowan seeds are largely imported into Europe since thymol has been universally introduced into medical practice (see Folia Thymi). They have proved much more remunerative for the manufacture of thymol than Thymus vulgaris. The largest quantities, we believe, of thymol have been made from ajowan at Leipzig.

Substitutes—Under the name Semen Ammi, the very small fruits of Ammi majus L. and of Sison Amomum L. have been often confounded with those of Ajowan; but the absence of hairs on the two former, not to mention some other differences, is sufficient to negative any supposition of identity.

The seeds of Hyoscyamus niger L. being called in India Khorāsāniajwān, a confusion might arise between them and true ajowan; though the slightest examination would suffice to show the difference.

Fructus Carui.

Semen Carui vel Carvi; Caraway Fruits, Caraway Seeds, Caraways; F. Fruits ou Semences de Carvi; G. Kümmel.

Botanical Origin—Carum Carvi L., an erect annual or biennial plant not unlike a carrot, growing in meadows and moist grassy land over the northern and midland parts of Europe and Asia, but to what extent truly wild cannot be always ascertained.

It is much cultivated in Iceland, and is also apparently wild. It grows throughout Scandinavia, in Finland, Arctic, Central, and Southern Russia, Persia, and in Siberia. It appears as a wild plant in many parts of Britain (Lincolnshire and Yorkshire), but is also cultivated in fields, and may not be strictly indigenous. The caraway is found throughout the eastern part of France, in the Pyrenees, Spain, Central Europe, Armenia, and the Caucasian provinces; and it grows wild largely in the high alpine region of Lahul, in the Western Himalaya.

But the most curious fact in the distribution of Carum Carvi is its occurrence in Morocco, where it is largely cultivated about El Araiche, and round the city of Morocco. The plant differs somewhat from that of Europe; it is an annual with a single erect stem, 4 feet high. Its foliage is more divided, and its flowers larger, with shorter styles and on more spreading umbels than the common caraway, and its fruit is more elongated.

History—The opinion that this plant is the Κάρος of Dioscorides, and that, as Pliny states, it derived its name from Caria (where it has never been met with in modern times) has very reasonably been doubted.

Caraway fruits were known to the Arabians, who called them Karawya, a name they still bear in the East, and the original of our words caraway and carui, as well as of the Spanish alcarahueya. In the description of Morocco by Edrisi, 12th century, it is stated that the inhabitants of Sidjilmâsa (the south-eastern province) cultivate cotton, cumin, caraway, henna (Lawsonia alba Lamarck). In the Arab writings quoted by Ibn Baytar, himself a Mauro-Spaniard of the 13th century, caraway is compared to cumin and anise. The spice probably came into use about this period. It is not noticed by St. Isidore, archbishop of Seville in the 7th century, though he mentions fennel, dill, coriander, anise, and parsley; nor is it named by St. Hildegard in Germany in the 12th century. Neither have we found any reference to it in the Anglo-Saxon Herbarium of Apuleius, written circa a.d. 1050, or in other works of the same period, though cumin, anise, fennel, and dill are all mentioned.

On the other hand, in two German medicine-books of the 12th and 13th centuries there occurs the word Cumich, which is still the popular name of caraway, in Southern Germany; and Cumin is also mentioned. In the same period the seeds appear to have been used by the Welsh physicians of Myddvai. Caraway was certainly in use in England at the close of the 14th century, as it figures with coriander, pepper and garlick in the Form of Cury, a roll of ancient English cookery compiled by the master-cooks of Richard II. about a.d. 1390.

The oriental names of caraway show that as a spice it is not a production of the East:—thus we find it termed Roman (i.e. European), Armenian, mountain, or foreign Cumin; Persian or Andalusian Caraway; or foreign Anise. And though it is now sold in the Indian bazaars, its name does not occur in the earlier lists of Indian spices.

Cultivation—In England, the caraway is cultivated exclusively in Kent and Essex, on clay lands. It was formerly sown mixed with coriander and teazel seed, but now with the former only. The plant, which requires the most diligent and careful cultivation, yields in its second year a crop which is ready for harvesting in the beginning of July. It is cut with a hook at about a foot from the ground, and a few days afterwards may be thrashed. The produce is very variable, but may be stated at 4 to 8 cwt. per acre.

Description—The fruits, which in structure correspond to those of other plants of the order, are laterally compressed and ovate. The mericarps which hang loosely suspended from the arms of the carpophore, are in the English drug about ⅙ of an inch in length and ¹/₂₀ in diameter, subcylindrical, slightly arched, and tipped with the conical, shrivelled stylopodium. They are marked with five pale ridges, nearly half as broad as the shining, dark brown furrows, each of which is furnished with a conspicuous vitta; a pair of vittæ separated from each other by a comparatively thin fibro-vascular bundle, occurs on the commissure.

Caraways are somewhat horny and translucent; when bruised, they evolve an agreeable fragrance resembling that of dill, and they have a pleasant spicy taste. In the London market, they are distinguished as English, Dutch, German, and Mogador, the first sort fetching the highest price. The fruit varies in size, tint and flavour; the English is shorter and plumper than the others; the Mogador is paler, stalky, and elongated—often ³/₁₀ of an inch in length.

Microscopic Structure—Caraways are especially distinguished by their enormous vittæ, which in transverse section display a triangular outline, the largest diameter, i.e. the base of the triangle, often attaining as much as 300 mkm. Even those of the commissure are usually not smaller.

Chemical Composition—Caraways contain a volatile oil, which the Dutch drug affords to the extent of 5·5 per cent., that grown in Germany to the amount of 7 per cent.; in Norway 5·8 per cent. have also been obtained from indigenous caraways. The position and size of the vittæ account for the fact that comminution of the fruits previous to distillation, does not increase the yield of oil.

Völckel (1840) showed that the oil is a mixture of a hydrocarbon C₁₀H₁₆, and an oxygenated oil, C₁₀H₁₄O. Berzelius subsequently termed the former Carvene and the latter Carvol.

Carvene, constituting about one-third of the crude oil, boils at 173° C., and forms with dry hydrochloric gas crystals of C₁₀H₁₆ + 2HCl. It has been ascertained by us that carvene, as well as carvol, has a dextrogyrate power, that of carvene being considerably the stronger; there are probably not many liquids exhibiting a stronger dextrogyrate rotation. Carvene is of a weaker odour than carvol, from which it has not yet been absolutely deprived; perfectly pure carvene would no doubt prove no longer to possess the specific odour of the drug. By distilling it over sodium it acquires a rather pleasant odour; its spec. gr. at 15° C. is equal to 0·861.

Carvol at 20° C. has a sp. gr. of 0·953; it boils at 224° C.; the same oil appears to occur in dill (see Fructus Anethi), and an oil of the same percental constitution is yielded by the spearmint. The latter however deviates the plane of polarization to the left. If 4 parts of carvol, either from caraways, dill, or spearmint, are mixed with 1 part of alcohol, sp. gr. 0·830, and saturated with sulphuretted hydrogen, crystals of (C₁₀H₁₄C)₂SH₂ are at once formed as soon as a little ammonia is added.

Oil of caraway of inferior quality is obtained from the refuse of the fruit; we find it less dextrogyrate than the oil from the fruits alone; this is due to the admixture of oil of turpentine before distilling.

If the carvol is distilled there remains in the still a thickish residue, from which a substance of the phenol class may be extracted by caustic lye.

Oil of caraway distilled in England from home-grown caraways is preferred in this country. On the Continent, that extracted from the caraways of Halle and Holland is considered to be of finer flavour than the oil obtained from those of Southern Germany.

The immature fruit of caraway is rich in tannic matter, striking blue with a salt of iron. It occurs abundantly in the tissue around the oil-ducts, where the presence of sugar may be also detected by alkaline tartrate of copper. Sugar occurs likewise in the embryo, but not in the albumen, in which latter protein substances predominate.

Production and Commerce—Caraways are exported from Finmark, the most northerly province of Norway; from Finland and Russia. In Germany, the cultivation, recommended by Gleditsch in 1776, is now largely carried on in Moravia, and in Prussia, especially in the neighbourhood of Halle. The districts of Erfurt and Merseburg, also in Prussia, are stated to yield annually about 30,000 cwt. Dutch caraways are produced in the provinces of North Holland, Gelderland and North Brabant, in the latter two from wild plants. Caraways are frequently shipped from the ports of Morocco; the quantity exported thence in 1872 was 952 cwt. and 288 cwt. in 1875.

The import of caraways into the United Kingdom in 1870 amounted to 19,160 cwt., almost all being from Holland.

The essential oil is manufactured on a large scale. According to a statement of the Chamber of Commerce of Leipzig, four establishments of that district produced in 1872 no less a quantity than 30,955 kilo. (68,277 lb.), valued at £24,000.

Uses—Caraway in the form of essential oil or distilled water is used in medicine as an aromatic stimulant, or as a flavouring ingredient. But the consumption in Europe is far more important as a spice, in bread, cakes, cheese, pastry, confectionary, sauces, etc., or in the form of oil as an ingredient of alcoholic liquors. The oil is also used for the scenting of soap.

Fructus Fœniculi.

Fennel Fruits, Fennel Seeds; F. Fruits de Fenouil; G. Fenchel.

Botanical Origin—Fœniculum vulgare Gärtn. (Anethum Fœniculum L.), an erect, branching plant with an herbaceous stem and perennial rootstock, growing to the height of 3 or 4 feet, having leaves 3 or 3 times pinnate with narrow linear segments. In allusion to the latter the plant had also been named Fœniculum capillaceum by Gilibert.

It appears to be truly indigenous to the countries extending from the Caspian regions (or even China?) to the Mediterranean and the Greek Peninsula, but is a doubtful native in many parts of Central and Southern Russia. The plant on the other hand is also found apparently wild, over a large portion of Western Europe as far as the British Isles, especially in the vicinity of the sea.

Fennel is largely cultivated in the central parts of Europe, as Saxony, Franconia and Wurtemberg, also in the South of France about Nîmes, and in Italy. It is extensively grown in India and China. The Indian plant is an annual of somewhat low stature.

The plant varies in stature, foliage, and in the size and form of its fruits; but all the forms belong apparently to a single species.

History—Fennel was used by the ancient Romans, as well for its aromatic fruits, as for its edible succulent shoots. It was also employed in Northern Europe at a remote period, as it is constantly mentioned in the Anglo-Saxon medical receipts, which date as early at least as the 11th century. The diffusion of the plant in Central Europe was stimulated by Charlemagne, who enjoined its cultivation on the imperial farms. Fennel shoots (turiones fœnuculi), fennel water, and fennel seed, as well as anise, are all mentioned in an ancient record of Spanish agriculture dating a.d. 961.

Description—The fennel fruits of commerce, commonly called Fennel Seeds, are of several kinds and of very different pecuniary value. The following are the principal sorts:—

1. Sweet Fennel,—known also as Roman Fennel, is cultivated in the neighbourhood of Nîmes in the south of France. The plant is a tall perennial with large umbels of 25 to 30 rays. As the plants grow old, the fruits of each succeeding season gradually change in shape and diminish in size, till at the end of 4 or 5 years they are hardly to be distinguished from those of the wild fennel growing in the same district. This curious fact, remarked by Tabernæmontanus (1588), was experimentally proved by Guibourt.

The fruits of Sweet Fennel as found in the shops are oblong, cylindrical, about ⁴/₁₀ of an inch in length by ⅒ in diameter, more or less arched, terminating with the two-pointed base of the style, and smooth on the surface. Each pericarp is marked by 5 prominent ridges, the lateral being thicker than the dorsal. Between the ridges lie vittæ, and there are two vittæ on the commissural surface,—all filled with dark oily matter. The fruits seen in bulk have a pale greenish hue; their odour is aromatic, and they have a pleasant, saccharine, spicy taste.

2. German Fennel, Saxon Fennel, produced especially near Weissenfels in the Prussian province of Saxony; the fruits are ²/₁₀ to ¼ of an inch long, ovoid-oblong, a little compressed laterally, slightly curved, terminating in a short conical stylopodium; they are glabrous, of a deep brown, each mericarp marked with 5 conspicuous pale ridges, of which the lateral are the largest. Seen in bulk, the fruits have a greenish brown hue; they have an aromatic saccharine taste, with the peculiar smell of fennel.

3. Wild or Bitter Fennel (Fenouil amer), collected in the south of France, where the plant grows without cultivation. They are smaller and broader than those of the German Fennel, being from ⅕ to ⅙ of an inch long by about ¹/₁₅ of an inch wide. They have less prominent ridges and at maturity are a little scurfy in the furrows and on the commissure. Their taste is bitterish, spicy, and strongly fennel-like. The essential oil (Essence de Fenouil amer) is distilled from the entire herb.

4. Indian Fennel.—A sample in our possession from Bombay resembles Sweet Fennel, but the fruits are not so long, and are usually straight. The mother plant of this drug is F. Panmorium DC., now regarded as a simple variety of F. vulgare Gärtn.

Microscopic Structure—The most marked peculiarity of fennel is exhibited by the vittæ, which are surrounded by a brown tissue. The latter is made up of cells resembling the usual form of cork-cells. In Sweet Fennel the vittæ are smaller than in the German fruit; in the transverse section of the latter, the largest diameter of these ducts is about 200 mkm.

Chemical Composition—The most important constituent of fennel fruits is the volatile oil, which is afforded both by the Sweet and the German fennel to the extent of about 3½ per cent.

Oil of fennel, from whatever variety of the drug obtained, consists of Anethol (or Anise-camphor)

C₆H₄ OCH₃

CH·CH·CH₃,

and variable but less considerable proportions of an oil, isomeric with oil of turpentine. Anethol is obtainable from fennel in two forms, the solid and the liquid; crystals of the former are deposited when the oil is subjected to a somewhat low temperature; the liquid anethol may be got by collecting the portion of the crude oil passing over at 225° C. The crystals of anethol fuse between 16 and 20°; the liquid form of anethol remains fluid even at -10° C. By long keeping, the crystals slowly become liquid and lose their power of reassuming a crystalline form.

Three varieties of oil of fennel are found in commerce, namely the oils of Sweet Fennel and Bitter Fennel offered by the drug-houses of the south of France; their money value is as 3 to 1, the oil of sweet fennel, which has a decidedly sweet taste, being by far the most esteemed. The third variety is obtained from Saxon fennel, especially by the manufacturers of Dresden and Leipzig. We have been supplied with type-specimens of the first two oils by the distillers, Messrs. J. Sagnier, fils, & Cie., Nîmes; a specimen of the third has been distilled in the laboratory of one of ourselves.

Oil of fennel differs from that of anise by displaying a considerable rotatory power. We found the above-mentioned specimens, examined in a column 50 mm. long, to deviate the ray of polarized light to the right thus:—

Oil of Sweet Fennel 29°·8

” Bitter ” 4°·8

” German ” 9°·1

The rotatory power is due to the hydrocarbon contained in the oil; we ascertain that anethol from oil of anise is devoid of it.

Fennel fruits contain sugar, yet their sweetness or bitterness depends on the essential oil rather than on the presence of that body. The albumen of the seed contains fixed oil, which amounts to about 12 per cent. of the fruit.

Uses—Fennel fruits are used in medicine in the form of distilled water and volatile oil, but to no considerable extent. The chief consumption is in cattle medicines, and of the oil in the manufacture of cordials.

Fructus Anisi.

Anise, Aniseed; F. Fruits d’Anis vert; G. Anis.

Botanical Origin—Pimpinella Anisum L., an annual plant, is indigenous to Asia Minor, the Greek Islands and Egypt, but nowhere to be met with undoubtedly growing wild. It is now also cultivated in many parts of Europe where the summer is hot enough for ripening its fruits, as well as in India and South America. It is not grown in Britain.

History—Anise, which the ancients obtained chiefly from Crete and Egypt, is among the oldest of medicines and spices. It is mentioned by Theophrastus, by the later writers Dioscorides and Pliny, as well as by Edrisi, who enumerates anise “sorte de graine douce” among the products of Tunisia. In Europe we find that Charlemagne (a.d. 812) commanded that anise should be cultivated on the imperial farms in Germany. The Anglo-Saxon writings contain frequent allusions to the use of dill and cumin, but we have failed to find in them any reference to anise, nor in the Meddygon Myddfai.

The Patent of Pontage granted by Edward I. in 1305 to raise funds for repairing the Bridge of London, enumerates Anise (anisium) among the commodities liable to toll. There are entries for it under the name of Annis vert in the account of the expenses of John, king of France, during his abode in England, 1359-60; and it is one of the spices of which the Grocers’ Company of London had the weighing and oversight from 1453. By the Wardrobe Accounts of Edward IV., a.d. 1480, it appears that the royal linen was perfumed by means of “lytill bagges of fustian stuffed with ireos and anneys.”

Anise seems to have been grown in England as a potherb prior to 1542, for Boorde in his Dyetary of Helth, printed in that year, says of it and fennel,—“these herbes be seldom vsed, but theyr seedes be greatly occupyde.”

In common with all other foreign commodities, anise was enormously taxed during the reign of Charles I., the duties levied upon it amounting to 75s. per 112 lb.

Description—Anise fruits, which have the usual characters of the order, are about ²/₁₀ of an inch in length, mostly undivided and attached to a slender pedicel. They are of ovoid form, tapering towards the summit, which is crowned by a pair of short styles rising from a thick stylopode; they are nearly cylindrical, but a little constricted towards the commissure. Each fruit is marked by 10 light-coloured ridges which give it a prismatic form; these as well as the rest of the surface of the fruit, are clothed with short rough hairs. The drug has a greyish brown hue, a spicy saccharine taste, and an agreeable aromatic smell.

Microscopic Structure—The most striking peculiarity of anise fruit is the large number of oil-ducts or vittæ it contains; each half of the fruit exhibits in transverse section nearly 30 oil-ducts, of which the 4 to 6 in the commissure are by far the largest. The hairs display a simple structure, inasmuch as they are the elongated cells of the epidermis a little rounded at the end.

Chemical Composition—The only important constituent of anise is the essential oil (Oleum Anisi), which the fruits afford to the extent of 3 per cent. from the best Moravian sort; Russian anise yields from 2·5 to 2·7 per cent., the German 2·3 per cent. This oil is a colourless liquid, having an agreeable odour of anise and a sweetish aromatic taste; its sp. gr. varies from 0·977 to 0·983. At 10° to 15° C., it solidifies to a hard crystalline mass, which does not resume its fluidity till the temperature rises to about 17° C.

Oil of anise resembles the oils of fennel, star-anise, and tarragon, in that it consists almost wholly of Anethol or Anise-camphor described in the previous article (p. 309). This fact explains the rotatory power of oil of anise being inferior to that of fennel. Oil of German anise, distilled by one of us, examined under the conditions stated, page 310, deviated only 1°·7, but to the left. Franck (1868) found oil of Saxon anise deviating 1°·1 to the right.

Production and Commerce—Anise is produced in Malta, about Alicante in Spain, in Touraine and Guienne in France, in Puglia (Southern Italy), in several parts of Northern and Central Germany, Bohemia and Moravia. The Russian provinces of Orel, Tula and Woronesh, south of Moscow, also produce excellent anise, and in Southern Russia, Charkow is likewise known for the production of this drug. In Greece, anise is largely cultivated under the name of γλυάισον, and it is much grown in Northern India. Considerable quantities are also now imported from Chili. The drug is, on the whole, always of a remarkably uniform appearance.

Uses—Anise is an aromatic stimulant and carminative, usually administered in the form of essential oil as an adjunct to other medicines. It is also used as a cattle medicine. The essential oil is largely consumed in the manufacture of cordials, chiefly in France, Spain, Italy, and South America.

Adulteration—The fruits of anise are sometimes mixed with those of hemlock, but whether by design or by carelessness we know not. Careful inspection with a lens will reveal this dangerous adulteration. We have known powdered anise also to contain hemlock, and have detected it by trituration in a mortar with a few drops of solution of potash, a sample of pure anise for comparison being tried at the same time.

The essential oil of aniseed may readily be confounded with that of Star-anise, which is distilled from the fruits of the widely different Illicium anisatum. As stated at p. 22, these oils agree so closely in their chemical and optical properties, that no scientific means are known for distinguishing them.

Radix Sumbul.

Sumbul Root; F. Racine de Sumbul, Sambola ou Sambula; G. Moschuswurzel.

Botanical Origin—Ferula Sumbul Hooker fil. (Euryangium Sumbul Kauffmann), a tall perennial plant discovered in 1869 by a Russian traveller, Fedschenko, in the mountains of Maghian near Pianjakent, in the northern part of the Khanat of Bukhara, nearly 40° N. lat., and 68° to 69° E. long. From Wittmann’s statements (1876) it would appear that the Sumbul plant abounds far east from that country, in the coast province of the Amoor. A living plant transmitted from the former district to the Botanical Garden of Moscow flowered there in 1871, another in 1875 at Kew, where the plant died after flowering.

History—The word sumbul, which is Arabic and signifies an ear or spike, is used as the designation of various substances, but especially of Indian Nard, the rhizome of Nardostachys Jatamansi DC. Under what circumstances, or at what period, it came to be applied to the drug under notice, we know not. Nor are we better informed as to the history of sumbul root, which we have been unable to trace by means of any of the works at our disposal. All we can say is, that the drug was first introduced into Russia about the year 1835 as a substitute for musk, that it was then recommended as a remedy for cholera, and that it began to be known in Germany in 1840, and ten years afterwards in England. It was admitted into the British Pharmacopœia in 1867.

Description—The root as found in commerce consists of transverse slices, 1 to 2 inches, rarely as much as 5 inches in diameter, and an inch or more in thickness; the bristly crown, and tapering lower portions, often no thicker than a quill, are also met with. The outside is covered by a dark papery bark; the inner surface of the slices is of a dirty brown, marbled with white, showing when viewed with a lens an abundant resinous exudation, especially towards the circumference. The interior is a spongy, fibrous, farinaceous-looking substance, having a pleasant musky odour and a bitter aromatic taste.

Microscopic Structure—The interior tissue of sumbul root is very irregularly constructed of woody and medullary rays, while the cortical part exhibits a loose spongy parenchyme. The structural peculiarity of the root becomes obvious, if thin slices are moistened with solution of iodine, when the medullary rays assume by reason of the starch they contain an intense blue. The structure of the root differs from the usual arrangement by the formation of independent secondary cambial zones with fibro-vascular bundles within the original cambium. Similar peculiarities are also displayed by the roots of Myrrhis odorata, Convolvulus Scammonia, Ipomœa Turpethum and others. Large balsam-ducts are also observable in Sumbul as well as in the roots of many other Umbelliferæ.

Chemical Composition—Sumbul root yields about 9 per cent. of a soft balsamic resin soluble in ether, and ⅓ per cent. of a dingy bluish essential oil. The resin has a musky smell, not fully developed until after contact with water. According to Reinsch (1848), it dissolves in strong sulphuric acid with a fine blue colour, but in our experience with a crimson brown. The same chemist states that when subjected to dry distillation, it yields a blue oil.

Solution of potash is stated to convert the resin of sumbul into a crystalline potassium salt of Sumbulamic Acid, which latter was obtained in a crystalline state by Reinsch in 1843, but has not been further examined. Sumbulamic acid, which smells strongly of musk, appears to be a different substance from Sumbulic or Sumbulolic Acid, the potassium salt of which may be extracted by water from the above-mentioned alkaline solution. Ricker and Reinsch (1848), assert that the last-mentioned acid, of which the root contains about ¾ per cent., is none other than Angelic Acid, accompanied, as in angelica root, by a little valerianic acid. All these substances require further investigation, as well as the body called Sumbulin, which was prepared by Murawjeff (1853), and is said to form with acids, crystalline salts.

Sommer has shown (1859) that by dry distillation, sumbul resin yields Umbelliferone, which substance we shall further notice when describing the constituents of galbanum.

Uses—Prescribed in the form of tincture as a stimulating tonic.

Adulteration—Bombay Sumbul, or “Boi,” is the root of Dorema Ammoniacum (see article Ammoniacum, p. 324), which is largely imported into Bombay, being used there in the Parsee fire temples as an incense. The largest roots, for which we are indebted to Professor Dymock, are three inches in diameter at the crown, by 8 inches in length. They are easily distinguished from the Sumbul by their decidedly yellowish hue as well as by the absence of any musky odour. We extracted by alcohol, from the root dried at 100° C., 26 per cent. of a resin identical with that afforded by commercial Ammoniacum.

Bombay Sumbul agrees with the Indian Sumbul as described by Pereira.

Asafœtida.

Gummi-resina Asafœtida vel Assafœtida; Asafœtida; F. Asafœtida; G. Asant, Stinkasant.

Botanical Origin—Two perennial umbelliferous plants are now generally cited as the source of this drug; but though they are both capable of affording a gum-resin of strong alliaceous odour, it has not been proved that either of them furnishes the asafœtida of commerce. The plants in question are:—

1. Ferula Narthex Boiss. (Narthex Asafœtida Falconer), a gigantic herbaceous plant, having a large root several inches in thickness, the crown of which is clothed with coarse bristly fibres; it has an erect stem attaining 10 feet in height, throwing out from near its base upwards a regular series of branches bearing compound umbels, each branch proceeding from the axil of a large sheathing inflated petiole, the upper of which are destitute of lamina. The radical leaves, 1½ feet long, are bipinnate with broadly ligulate obtuse lobes. It has a large flat fruit with winged margin. When wounded, the plant exudes a milky juice having a powerful smell of asafœtida. It commences to grow in early spring, rapidly throwing up its foliage, which dies away at the beginning of summer. It does not flower till the root has acquired a considerable size and is several years old.

F. Narthex, which now exists in several botanic gardens and has flowered twice in that of Edinburgh, was discovered by Falconer in 1838, in the valley of Astor or Hasora (35° N. lat., 74°·30 E. long. north of Kashmir).

2. Ferula Scorodosma Bentham et Hooker (Scorodosma fœtidum Bunge; Ferula Assa fœtida L. in Boissier, Flora orientalis ii. 994)—In form of leaf, in the bristly summit of the root, and in general aspect, this plant resembles the preceding; but it has the stem (5 to 7 feet high) nearly naked, with the umbels, which are very numerous, collected at the summit; and the few stem-leaves have not the voluminous sheathing petioles that are so striking a feature in Narthex. In Narthex, the vittæ of the fruit are conspicuous,—in Scorodosma almost obsolete; but the development of these organs in feruloid plants varies considerably, and has been rejected by Bentham and Hooker as affording no important distinctive character. Scorodosma is apparently more pubescent than Narthex.

F. Scorodosma was discovered by Lehmann in 1841, in the sandy deserts eastwards of the Sea of Aral, and also on the hills of the Karatagh range south of the river Zarafshan,—that is to say, south-east of Samarkand. In 1858-59, it was observed by Bunge about Herat. At nearly the same period, it was afresh collected between the Caspian and Sea of Aral, and in the country lying eastward of the latter, by Borszczow, a Russian botanist, who has made it the subject of an elaborate and valuable memoir.

The most detailed account of the asafœtida plant we possess is that of the German traveller Engelbert Kämpfer, who in 1687 observed it in the Persian province of Laristan, between the river Shúr and the town of Kongún, also in the neighbourhood of the town of Dusgan or Disgun, in which latter locality alone he saw the gum-resin collected. He states that he found the plant also growing near Herat. Kämpfer has given figures of his plant which he calls Asa fœtida Disgunensis, and his specimens consisting of remnants of leaves, a couple of mericarps (in a bad state) and a piece of the stem a few inches long, are still preserved in the British Museum.

These materials have been the subject of much study, in order to determine which of the asafœtida plants of modern botanists should be identified with that of Kämpfer. Falconer and Borszczow have arrived in turns at the conclusion that his own plant accords with Kämpfer’s. But Kämpfer’s figures agree well neither with Narthex nor with Scorodosma. The plant they represent does not form, it would seem, the branching pyramid of the Narthex (as it flowered at Edinburgh), nor has it the multitude of umbels seen in Borszczow’s figure of Scorodosma.

Whether Kämpfer’s plant is really identical with either of those we have noticed, and whether the discrepancies observable are due to careless drawing, or to actual difference, are points that cannot be settled without the examination of more ample specimens.

Great allowance must be made for the period of growth at which these plants have been observed. Kämpfer saw his plant when quite mature, and not when its stem was young and flowering. Narthex is scarcely known except from specimens grown at Edinburgh, those obtained by Falconer in Tibet having been gathered when dry and withered. Even Borszczow’s plant appears never to have been seen by any botanist while its flower-stem was in a growing state.

History—Whether the substance which the ancients called Laser was the same as the modern Asafœtida is a question that has been often discussed during the last three hundred years, and it is one upon which we shall attempt to offer no further evidence. Suffice it to say that Laser is mentioned along with products of India and Persia, among the articles on which duty was levied at the Roman custom-house of Alexandria in the 2nd century.

“Hingu,” doubtless meaning Asafœtida, occurs in many Sanskrit works, especially in epic poetry, but also in Susruta.

Asafœtida was certainly known to the Arabian and Persian geographers and travellers of the middle ages. One of these, Ali Istakhri, a native of Istakir, the ancient Persepolis, who lived in the 10th century, states that it produced abundantly in the desert between Sistan and Makran, and is much used by the people as a condiment. The region in question comprises a portion of Beluchistan.

The geographer Edrisi, who wrote about the middle of the 12th century, asserts that asafœtida, called in Arabic Hiltit, is collected largely in a district of Afghanistan near Kaleh Bust, at the junction of the Helmand with the Arghundab, a locality still producing the drug. Other Arabian writers as quoted by Ibn Baytar, describe asafœtida in terms which show it to have been well known and much valued.

Matthæus Platearius, who flourished in the second half of the 12th century, mentions asafœtida in his work on simple medicines, known as Circa instans, which was held in great esteem during the middle ages. It is also named a little later by Otho of Cremona, who remarks that the more fœtid the drug, the better its quality. Like other productions of the East, asafœtida found its way in European commerce during the middle ages through the trading cities of Italy. It is worthy of remark that it is much less frequently mentioned by the older writers than galbanum, sagapenum and opopanax. In the 13th century, the “Physicians of Myddfai” in Wales, considered asafœtida as one of the substances which every physician “ought to know and use.”

Collection—The collecting of asafœtida on the mountains about Dusgun in Laristan in Persia, as described by Kämpfer, is performed thus:—

The peasants repair to the localities where the plants abound, about the middle of April, at which time the latter have ceased growing, and their leaves begin to show signs of withering. The soil surrounding the plant is removed to the depth of a span, so as to bare a portion of the root. The leaves are then pulled off, the soil is replaced, and over it are laid the leaves and other herbage, with a stone to keep them in place, the whole being arranged in this way to prevent injury to the root by the heat of the sun.

About forty days later, that is towards the end of May, the people return, the men being armed with knives for cutting the root, and broad iron spatulas for collecting the exuded juice. Having first removed the leaves and earth, a thinnish slice is taken from the fibrous crown of the root, and two days later the juice is scraped from the flat cut surface. The root is again sheltered, care being taken that nothing rests on it. This operation is repeated twice in the course of the next few days, a very thin slice being removed from the root after each scraping. The product got during the first cutting is called shīr, i.e. milk, and is thinner and more milky and less esteemed than that obtained afterwards. It is not sold in its natural state, but is mixed with soft earth (terra limosa) which is added to the extent of an equal, or even double, weight of the gum-resin, according to the softness of the latter.

After the last cutting, the roots are allowed to rest 8 or 10 days, when a thicker exudation called pispaz, more esteemed than the first, is obtained by a similar process carried on at intervals during June and July, or even later, until the root is quite exhausted.

The only recent account of the production of asafœtida that we have met with, is that of Staff-surgeon H. W. Bellew, who witnessed the collection of the drug in 1857 in the neighbourhood of Kandahar. The frail withered stem of the previous year with the cluster of newly-sprouted leaves, is cut away from the top of the root, around which a trench of 6 inches wide and as many deep, is dug in the earth. Several deep incisions are now made in the upper part of the root, and this operation is repeated every 3 or 4 days as the sap continues to exude, which goes on for a week or two according to the strength of the plant. The juice collects in tears about the top of the root, or when very abundant flows into the hollow around it. In all cases as soon as incisions are made, the root is covered with a bundle of loose twigs or herbs, or even with a heap of stones, to protect it from the drying effects of the sun. The quantity of gum-resin obtained is variable; some roots yield scarcely half an ounce, others as much as two pounds. Some of the roots are no larger than a carrot, others attain the thickness of a man’s leg. The drug is said to be mostly adulterated before it leaves the country, by admixture of powdered gypsum or flour. The finest sort, which is generally sold pure, is obtained solely “from the node or leaf-bud in the centre of the root-head.” At Kandahar, the price of this superior drug is equivalent to from 2s. 8d. to 4s. 8d. per lb, while the ordinary sort is worth but from 1s. to 2s.

During a journey from North-western India to Teheran in Persia, through Beluchistan and Afghanistan, performed in the spring of 1872, the same traveller observed the asafœtida plant in great abundance on many of the elevated undulating pasture-covered plains and hills of Afghanistan, and of the Persian province of Khorassan. He states that the plant is of two kinds, the one called Kamá-i-gawí which is grazed by cattle and used as a potherb, and the other known as Kamá-i-angúza which affords the gum-resin of commerce. The collecting of this last is almost exclusively in the hands of the western people of the Kákarr tribe, one of the most numerous and powerful of the Afghan clans, who, when thus occupied, spread their camps over the plains of Kandahar to the confines of Herat.

Wood, in his journey to the source of the Oxus, found asafœtida to be largely produced in a district to the north of this, namely the mountains around Saigan or Sykan (lat. 35° 10, long. 67° 40), where, says he, the land affording the plant is as regularly apportioned out and as carefully guarded as the cornfields on the plain.

Description—The best asafœtida is that consisting chiefly of slightly or not agglutinated tears. This is the Kandahari-Hing of the Bombay market, which is not always to be met with in Bombay, and even there is only used by wealthy people as a condiment. It is not exported to Europe. The best sort shipped to Europe is the Anguzeh-i-Lari, coming from Laristan by way of Afghanistan and the Bolan Pass to Bombay. It shows agglutinated tears, or when freshly imported, it forms a clammy yet hard yellowish-grey mass, in which opaque, white or yellowish milky tears, sometimes an inch or two long, are more or less abundant.

Sometimes asafœtida is imported as a fluid honey-like mass, apparently pure. We presume that such is that of the first gathering, which Kämpfer says is called milk. The drug is often adulterated with earthy matter which renders it very ponderous; it must be granted that an addition of such matters may often be necessary in order to enable the drug to be transported. This earthy or stony asafœtida constitutes at Bombay a distinct article of commerce under the name of Hingra.

By exposure to air, asafœtida acquires a bright pink and then a brown hue. The perfectly pure tears display when fractured a conchoidal surface, which changes from milky white to purplish pink in the course of some hours. If a tear is touched with nitric acid sp. gr. 1·2, it assumes for a short time a fine green colour.

When asafœtida is rubbed in a mortar with oil of vitriol, then diluted with water and neutralized, the slightly coloured solution exhibits a bluish fluorescence. The same will be observed, to some extent, if tears of the drug are immersed in water and a little ammonia is added. The tears of asafœtida when warmed become adhesive, but by cold are rendered so brittle that they may be powdered. With water they easily form a white emulsion.

The drug has a powerful and persistent alliaceous odour and a bitter acrid alliaceous taste.

Chemical Composition—Asafœtida consists of resin, gum and essential oil, in varying proportions, but the resin generally amounting to more than one-half.

As to the oil, we have repeatedly obtained from 6 to 9 per cent. by distilling it from common copper stills. It is light yellow, has a repulsive, very pungent odour of asafœtida, tastes at first mild, then irritating, but does not stimulate like oil of mustard when applied to the skin. It is neutral, but after exposure to the air acquires an acid reaction and different odour; it evolves sulphuretted hydrogen. In the fresh state, the oil is free from oxygen; it begins to boil at 135° to 140° C., but with continued evolution of hydrogen sulphide, so that we did not succeed in preparing it of constant composition, the amount of sulphur varying from 20 to 25 per cent. We found it to have a sp. gr. of 0·951 at 25°, and a strong dextrogyrate power. If one drop of it is allowed to float on water it assumes a fine violet hue by vapours of bromine.

The essential oil of asafœtida submitted to fractional distillation yielded us, at 300°, a considerable proportion of a most beautifully blue coloured oil. By very cautiously oxidizing the crude oil, we obtained a small amount of extremely deliquescent crystals of a sulphonic acid. Sodium or potassium decomposes the oil with evolution of gas, forming potassium sulphide; the residual oil is found to have the odour of cinnamon.

The resin of asafœtida is not wholly soluble in ether or in chloroform, but dissolves with decomposition in warm concentrated nitric acid. It contains a little Ferulaic Acid,

C₆H₃ OCH₃ CH·CH·COOH,

OH

discovered by Hlasiwetz and Barth in 1866, crystallizing in iridescent needles soluble in boiling water; it is homologous with Eugetic Acid,

C₆H₂ OCH₃ COOH,

OH CH·CH·CH₃,

which is to be obtained by adding CO₂ to the molecule of eugenol (page 284).

Ferulaic acid may be obtained from vanillin,

OCH₃

C₆H₃ OH (see article Vanilla).

CHO

Fused with potash, ferulaic acid yields oxalic and carbonic acids, several acids of the fatty series, and protocatechuic acid. The resin itself treated in like manner after it has been previously freed from gum, yields resorcin; and by dry distillation, oils of a green, blue, violet or red tint, besides about ¼ per cent. of Umbelliferone, C₉H₆O₃.

The mucilaginous matter of asafœtida consists of a smaller part soluble in water and an insoluble portion. The former yields a neutral solution which is not precipitated by neutral acetate of lead. The insoluble part is readily dissolved by caustic lye and again separates on addition of acids.

Commerce—The drug is at the present day produced exclusively in Afghanistan. Much of it is shipped in the Persian Gulf for Bombay, whence it is conveyed to Europe; it is also brought into India by way of Peshawur, and by the Bolan pass in Beluchistan.

In the year 1872-73, there were imported into Bombay by sea, chiefly from the Persian Gulf, 3367 cwt. of asafœtida, and 4780 cwt. of the impure form of the drug called Hingra. The value of the latter is scarcely a fifth that of the genuine kind. The export of asafœtida from Bombay to Europe is very small in comparison with the shipments to other ports of India.

Uses—Asafœtida is reputed stimulant and antispasmodic. It is in great demand on the Continent, but is little employed in Great Britain. Among the Mahommedan as well as Hindu population of India, it is generally used as a condiment, and is eaten especially with the various pulses known as dāl. In regions where the plant grows, the fresh leaves are cooked as an article of diet.

Adulteration—The systematic adulteration, chiefly with earthy matter already pointed out, may be estimated by exhausting the drug with alcohol and incinerating the residue.

Allied Substances.

Hing from Abushahir, also in Bombay simply called Hing.

Among the natives of Bombay, a peculiar form of asafœtida is in use that commands a much higher price than those just described; it is also the only kind admitted there in the government sanitary establishmente. This is the Abushaheree Hing, imported from Abushir (Bender Bushehr) and Bender Abassi on the Persian Gulf. It is the product of Ferula alliacea Boiss. (F. Asafœtida Boiss. et Buhse, non Linn.) discovered in 1850 by Buhse, and observed in 1858-59 by Bunge in many places in Persia. This Hing is collected near Yezd in Khorassan, and also in the province of Kerman, the plant being known as angúza, the same name that is applied to Scorodosma.

Abushaheree Hing is never brought into European trade. It forms an almost blackish brown, originally translucent, brittle mass, of extremely fœtid alliaceous odour, containing many pieces of the stem with no admixture of earth. Guibourt, by whom it was first noticed, was convinced that it had not been obtained from the root, but had been cut from the stem. He remarks that Theophrastus alludes to asafœtida (as he terms the Silphium of this author) as being of two kinds,—the one of the stem, the other of the root; and thinks the former may be the sort under notice. Vigier, who calls it Asafœtida nauséeux, found it to contain in 100 parts, of resin and essential oil 37·5, and gum 23·7.

We find the odour of the Hing much more repulsive than that of common Asafœtida. The former yields an abundance of essential oil, which differs by its reddish hue from that of asafœtida. The oil of Hing, as distilled by one of us (1877) has also a higher specific gravity, namely, 1·02 at 25° C. We find also its rotatory power stronger; it deviated 38°·8 to the right, when examined in a column of 100 millimetres in length. The oil of common asafœtida deviated 13°·5 under the same conditions.

By gently warming the Abushaheree Hing with concentrated hydrochloric acid, about 1·12 sp. gr., it displays simply a dingy brown hue. By shaking it with water and a little ammonia no fluorescence is produced. In all these respects there is consequently a well-marked difference between the drug under examination and common asafœtida.

F. teterrima Kar. et Kir., a plant of Soungaria, is likewise remarkable for its intense alliaceous smell; but the plant is not known as the source of any commercial product.

Galbanum.

Gummi-resina Galbanum; Galbanum; F. Galbanum; G. Mutterharz.

Botanical Origin—The uncertainty that exist as to the plants which furnish asafœtida, hangs over those which produce the nearly allied drug Galbanum. Judging from the characters of the latter, it can scarcely be doubted that it is yielded by umbelliferous plants of at least two species, which are probably the following:—

1. Ferula galbaniflua Boiss. et Buhse,—a plant with a tall, solid stem, 4 to 5 feet high, greyish, tomentose leaves, and thin flat fruits, 5 to 6 lines long, 2 to 3 broad, discovered in 1848 at the foot of Demawend in Northern Persia, and on the slopes of the same mountain at 4,000 to 8,000 feet, also on the mountains near Kushkäk and Churchurä (Jajarúd?). Bunge collected the same plant at Subzawar. Buhse says that the inhabitants of the district of Demawend collect the gum-resin of this plant which is Galbanum; the tears which exude spontaneously from the stem, especially on its lower part and about the bases of the leaves, are at first milk-white, but become yellow by exposure to light and air. It is not the practice, so far as he observed, to wound the plant for the purpose of causing the juice to exude more freely, nor is the gathering of the gum in this district any special object of industry. The plant is called in Persian Khassuih, and the Mazanderan dialect Boridsheh.

2. F. rubricaulis Boiss. (F. erubescens Boiss. ex parte, Aucher exsicc. n. 4614, Kotschy n. 666).—This plant was collected by Kotschy in gorges of the Kuh Dinar range in Southern Persia, and probably by Aucher-Eloy on the mountain of Dalmkuh in Northern Persia. Borszczow, who regards it as the same as the preceding (though Boissier places it in a different section of the genus), says, on the authority of Buhse, that it occurs locally throughout the whole of Northern Persia, is found in plenty on the slopes of Elwund near Hamadan, here and there on the edge of the great central salt-desert of Persia, on the mountains near Subzawar, between Ghurian and Kháf, west of Herat, and on the desert plateau west of Kháf. He states, though not from personal observation, that its gum-resin, which constitutes Persian Galbanum, is collected for commercial purposes around Hamadan. F. rubricaulis Boiss. has been beautifully figured by Berg under the name of F. erubescens.

History—Galbanum, in Hebrew Chelbenah, was an ingredient of the incense used in the worship of the ancient Israelites, and is mentioned by the earliest writers on medicine as Hippocrates and Theophrastus. Dioscorides states it to be the juice of a Narthex growing in Syria, and describes its characters, and the method of purifying it by hot water exactly as followed in modern times. We find it mentioned in the 2nd century among the drugs on which duty was levied at the Roman custom-house at Alexandria. Under the name of Kinnah it was well known to the Arabians, and through them to the physicians of the school of Salerno.

In the journal of expenses of John, king of France, during his captivity in England, a.d. 1359-60, there is an entry for the purchase of 1 lb. of Galbanum which cost 16s., 1 lb. of Sagapenum (Serapin) at the same time costing only 2s. In common with other products of the East, these drugs used to reach England by way of Venice, and are mentioned among the exports of that city to London in 1503.

An edict of Henry III. of France promulgated in 1581, gives the prices per lb. of the gum-resins of the Umbelliferæ as follows:—Opopanax, 32 sols, Sagapenum 22 sols, Asafœtida 15 sols, Galbanum 10 sols, Ammoniacum 6 sols 6 deniers.

Description—Galbanum is met with in drops or tears, adhering inter se into a mass, usually compact and hard, but sometimes found so soft as to be fluid. The tears are of the size of a lentil to that of a hazel-nut, translucent, and of various shades of light brown, yellowish or faintly greenish. The drug has a peculiar, not unpleasant, aromatic odour, and a disagreeable, bitter, alliaceous taste.

In one variety, the tears are dull and waxy, of a light yellowish tint when fresh, but becoming of an orange-brown by keeping; they are but little disposed to run together, and are sometimes quite dry and loose, with an odour that somewhat reminds one of savine. In recent importations of this form of galbanum, we have noticed a considerable admixture of thin transverse slices of the root of the plant, an inch or more in diameter.

Chemical Composition—Galbanum contains volatile oil, resin and mucilage. The first, of which 7 per cent. may be obtained by distillation with water, is a colourless or slightly yellowish liquid, partly consisting of a hydrocarbon, C₁₀H₁₆, boiling at from 170° to 180°. This oil affords easily crystals of terpin, C₁₀H₁₆ + 3OH₂, if it is treated as mentioned in the article Oleum Cajuputi; it also affords the crystallized compound C₁₀H₁₆ + HCl. But the prevailing part of oil of galbanum consists of hydrocarbons of a much higher boiling point. The crude oil has a mild aromatic taste, and deviates the ray of polarized light to the right.

The resin, which we find to constitute about 60 per cent. of the drug, is very soft, and dissolves in ether or in alkaline liquids, even in milk of lime, but only partially in bisulphide of carbon. When heated for some time at 100° C. with hydrochloric acid, it yields Umbelliferone, C₉H₆O₃, which may be dissolved from the acid liquid by means of ether or chloroform; it is obtained on evaporation in colourless acicular crystals. Umbelliferone is soluble in hot water; its solution exhibits, especially on addition of an alkali, a brilliant blue fluorescence which is destroyed by an acid. If a small fragment of galbanum is immersed in water, the fluorescence is immediately produced by a drop of ammonia. The same phenomenon takes place with asafœtida, not at all with ammoniacum; it is probably due to traces of Umbelliferone pre-existing in the former drugs. By boiling the umbelliferone with concentrated caustic lye, it splits up into resorcin, carbonic acid and formic acid.

Umbelliferone is also produced from many other aromatic umbelliferous plants, as Angelica, Levisticum and Meum, when their respective resins are submitted to dry distillation. According to Zwenger (1860) it may be likewise obtained from the resin of Daphne Mezereum L. The yield is always small; it is highest in galbanum, but even in this does not much exceed 0·8 per cent. reckoned on the crude drug.

By submitting galbanum-resin to dry distillation, there will be obtained a thick oil of an intense and brilliant blue, which was noticed as early as about the year 1730 by Caspar Neumann of Berlin. It is a liquid having an aromatic odour and a bitter acrid taste; in cold it deposits crystals of umbelliferone, which can be extracted by repeatedly shaking the oil with boiling water. A small amount of fatty acids is also removed at the same time. Submitted to rectification the crude oil at first yields a greenish portion and then the superb blue oil. Kachler (1871) found that it could be resolved by fractional distillation into a colourless oil having the formula C₁₀H₁₆, and a blue oil to which he assigned the composition C₁₀H₁₆O, boiling at 289° C. As to the hydrocarbon, it boils at 240° C., and therefore differs from the essential oil obtained when galbanum is distilled with water. The blue oil, after due purification, agrees, according to Kachler, with the blue oil of the flowers of Matricaria Chamomilla L. Each may be transformed by means of potassium into a colourless hydrocarbon, C₁₀H₁₆; or by anhydride of phosphoric acid into another product, C₁₀H₁₄, likewise colourless. The latter, as well as the former hydrocarbon, if diluted with ether, and bromine be added, assumes for a moment a fine blue tint; the colourless oil as afforded by the drug on distillation with water assumes also the same coloration with bromine.

By fusing galbanum-resin with potash, Hlasiwetz and Barth (1864) obtained crystals (about 6 per cent.) of Resorcin or Meta-Dioxybenzol, together with acetic and volatile fatty acids. The name of this remarkable substance alludes to Orcin, which had been extracted in 1829 by Robiquet from lichens. The formula of Resorcin, C₆H₄(OH)₂, shows at once its relations to Orcin, C₆H₃CH₃(OH)₂. Resorcin has been ascertained to be frequently produced by melting other resins with potash; it has also been prepared on a large scale for the manufacture of the brilliant colouring matter called Eosin. Galbanum-resin treated with nitric acid yields Trinitroresorcin C₆H(NO₂)₃(OH)₂, the so-called Styphnic Acid.

If galbanum, or still better its resin, is very moderately warmed with concentrated hydrochloric acid, a red hue is developed, which turns violet or bluish if spirit of wine is slowly added. Asafœtida treated in the same way assumes a dingy greenish colour, and ammoniacum is not altered at all. This test probably depends upon the formation of resorcin, which in itself is not coloured by hydrochloric acid, but assumes a red or blue colour if sugar or mucilage or certain other substances are present. It is remarkable that ammoniacum, though likewise yielding resorcin when fused with potash, assumes no red colour when warmed with hydrochloric acid. The mucilage of galbanum has not been minutely examined.

Commerce—Galbanum is, we believe, brought into commerce chiefly from Eastern Europe. It is stated that considerable quantities reach Russia by way of Astrachan and Orenburg.

Uses—Galbanum is administered internally as a stimulating expectorant, and is occasionally applied in the form of plaster to indolent swellings.

Allied Substances.

Sagapenum—This is a gum-resin which, when pure, forms a tough softish mass of closely agglutinated tears. It differs from asafœtida in forming brownish (not milk-white) tears, which when broken do not acquire a pink tint; also in not having an alliaceous odour. A good specimen presented to us by Professor Dymock of Bombay (1878) reminds in that and other respects rather of galbanum. We find this sagapenum to be devoid of sulphur but containing umbelliferone; it is extremely remarkable for the intense and permanent purely blue colour it acquires in cold when the smallest fragment of the drug is immersed in hydrochloric acid 1·13 sp. gr.

Sagapenum, which in mediæval pharmacy was often called Serapinum, is so frequently mentioned by the older writers that it must have been a plentiful substance. At the present day it can scarcely be procured genuine even at Bombay, whither it is sometimes brought from Persia. The botanical origin of the drug is unknown.

Ammoniacum.

Gummi-resina Ammoniacum; Ammoniacum or Gum Ammoniacum; F. Gomme-résine Ammoniaque; G. Ammoniak-gummiharz.

Botanical Origin—Dorema Ammoniacum, Don, a perennial plant, with a stout, erect, leafless flower-stem, 6 to 8 feet high, dividing towards its upper part into numerous ascending branches, along which are disposed on thick short stalks, ball-like simple umbels, scarcely half an inch across, of very small flowers. The aspect of the full-grown plant is therefore very unlike that of Ferula. The Dorema has large compound leaves with broad lobes. The whole plant in its young state is covered with a tomentum of soft, stellate hairs, which give it a greyish look, but which disappear as it ripens its fruits. The withered stems long remain erect, and occurring in immense abundance and overtopping the other vegetation of the arid desert, having a striking appearance. The root is described in the article on Sumbul, p. 313.

The plant occurs over a wide area of the barren regions of which Persia is the centre. According to Bunge and Bienert, its north-western limit appears to be Shahrud (S.E. of Asterabad), whence it extends eastwards to the deserts south of the Sea of Aral and the Sir-Daria. The most southern point at which the plant has been observed is Basiran, a village of Southern Khorassan in N. lat. 32°, E. long. 59°.

Of the three or four other species of Dorema, D. Aucheri Boiss. affords very good ammoniacum, as we know by an ample specimen of the gum deposited together with the plant in the British Museum by Mr. W. K. Loftus, who in 1751 collected both at Kirrind in Western Persia, where the plant is called in Kurdish Zuh. Boissier includes as D. Aucheri another plant, called by Loftus D. robustum, the gum of which is certainly different from ammoniacum. Of the plant itself there are only fruits in the British Museum.

History—The first writer to mention ammoniacum is Dioscorides, who states it to be the juice of a Narthex growing about Cyrene in Libya, and that it is produced in the neighbourhood of the temple of Ammon. He says it is of two sorts, the one like frankincense in pure, solid tears, the other massive, and contaminated with earthy impurities. Pliny gives essentially the same account.

The succeeding Greek and Latin authors on medicine throw but little light on the drug, which however is mentioned by most of them as used in fumigation. Hence we find such terms as Ammoniacum thymiama, Ammoniacum suffimen, Thus Libycum.

The African origin assigned to the drug by Dioscorides, has long perplexed pharmacologists; but it is now well ascertained that in Morocco a large species of Ferula yields a gum-resin having some resemblance to ammoniacum, and still an object of traffic with Egypt and Arabia, where it is employed, like the ancient drug, in fumigations. There can be but little doubt we think, that the ammoniacum of Morocco is identical with the ammoniacum of the ancients; it may well have been imported by way of Cyrene from regions lying further westward.

Persian ammoniacum or the ammoniacum of European commerce may also have been known in very remote times, though we are unable to trace it back earlier than the 10th century, at which period it is mentioned by Isaac Judæus and by the Persian physician Alhervi. Both these writers designate it Ushak, a name which it bears in Persia to the present day.

Collection—The stem of the plant abounds in a milky juice which flows out on the slightest puncture. The agent which occasions the exudation is a beetle, multitudes of which pierce the stem. The gum, the drops of which speedily harden, partly remains adherent to the stem and partly falls to the ground; it is gathered about the end of July by the peasants, who sell it to dealers for conveyance to Ispahan or the coast.

Young roots 3 to 4 years old are, according to Borszczow, extremely rich in milky juice which sometimes exudes into the surrounding soil in large drops; there is also an exudation from the fibrous crown of the root of a dark inferior sort of ammoniacum. The gum-resin appears to be collected in quantity only in Persia. One of the chief localities for it are the desert plains about Yezdikhast, between Ispahan and Shiraz.

Description—Ammoniacum occurs in dry grains or tears of roundish form, from the size of a small pea to that of a cherry, or in nodular lumps. They are externally of a pale creamy yellow, opaque and milky-white within. By long keeping, the outer colour darkens to a cinnamon-brown. Ammoniacum is brittle, showing when broken a dull waxy lustre, but it easily softens with warmth. It has a bitter acrid taste, and a peculiar, characteristic, non-alliaceous odour. It readily forms a white emulsion when triturated with water. It is coloured yellow by caustic potash. Hypochlorites, as common bleaching powder, give it a bright orange hue, while they do not affect the Morocco drug.

Ammoniacum is obtained from the mature plant, the ripe mericarps of which, ⅜ of an inch in length, are often found sticking to the tears. By pressure the tears agglutinate into a compact mass, which is the Lump Ammoniacum of the druggists. It is generally less pure than the detached grains, and fetches a lower price.

Chemical Composition—Ammoniacum is a mixture of volatile oil with resin and gum. We obtained only ⅓ per cent. of oil which we find to be dextrogyrate; we failed in obtaining terpin (see Galbanum, p. 322) from it. The oil has the precise odour of the drug, contains, according to our experiments, no sulphur; a similar observation was made by Przeciszewski. Vigier asserts that it blackens silver, and that after oxidation with nitric acid, he detected in it sulphuric acid. He states that, with hydrochloric acid, the oil acquires a fine violet tint passing by all shades to black; we failed in obtaining this coloration. By diluting the oil with bisulphide of carbon, and then adding mineral acids, we observed only yellow colorations. The oil diluted with alcohol acquires a reddish hue by ferric chloride.

The resin ammoniacum usually amounts to about 70 per cent. Przeciszewski asserts that the indifferent resin when heated yields sulphuretted hydrogen. Our own experiments failed to show the presence of sulphur in the crude drug; and the same negative result has been more recently obtained in some careful experiments by Moss. Water when boiled with the resin acquires a yellow hue and slightly acid reaction; the liquid assumes an intense red coloration on addition of ferric chloride.

Unlike the gum-resin of allied plants, ammoniacum yields no umbelliferone. When melted with caustic potash it affords a little resorcin.

The mucilaginous matter of the drug consists of a gum readily soluble in water and a smaller quantity of about ¼ of an insoluble part, no doubt identical with that occurring in asafœtida and galbanum. The aqueous solution of the gum of ammoniacum is very slightly levogyre.

Commerce—Ammoniacum is shipped to Europe from the Persian Gulf by way of Bombay. The exports from the latter place in the year 1871-72 were 453 cwt., all shipped to the United Kingdom. The quantity imported into Bombay in 1872-73 was 1671 cwt., all from the Persian Gulf.

Uses—The drug is administered as an expectorant and is also used in certain plasters.

Allied Gum-resins.

African Ammoniacum.—This is according to Lindley the product of Ferula tingitana L., a species growing over all northern Africa as far as Syria, Rhodus and Chios. It is called Kelth in Morocco, its product, Fasay, being shipped occasionally at Mazagan (el Bridja) or also at Mogador. This gum-resin is in large, compact, dark masses, formed of agglutinated tears having a whitish or pale greenish, or a fawn colour. But there are also seen very impure masses. The weak odour of the Moroccan drug is not suggestive of true ammoniacum. Moss (1873) found in a specimen of the former 9 per cent. of gum and 67 per cent. of resin. It yielded umbelliferone to Hirschsohn (1875), and by melting it with potash Goldschmiedt (1878) obtained Resorcin and a peculiar acid, C₁₀H₁₀O₆, which he failed to obtain from true ammoniacum.

Opopanax—A gum-resin occurring in hard, nodular, brittle, earthy-looking lumps of a bright orange-brown hue, and penetrating offensive odour, reminding one of crushed ivy-leaves. It is commonly attributed to Opopanax Chironium Koch, a native of Mediterranean Europe. We have never seen a specimen known to have been obtained from this plant; but can say that the gum-resin of the nearly allied Opopanax persicum Boiss., as collected by Loftus at Kirrind in Western Persia in 1851, has neither the appearance nor the characteristic odour of officinal opopanax. Powell, who endeavoured to trace the origin of the drug, regards it as a product of Persia.

Opopanax was very common in old pharmacy, but has fallen out of use, and is now both rare and expensive.

Fructus Anethi.

Semen Anethi; Dill Fruits, Dill Seeds; F. Fruits d’Aneth; G. Dillfrüchte.

Botanical Origin—Anethum graveolens L., (Peucedanum graveolens Hiern) an erect, glaucous annual plant, with finely striated stems, usually to 1 to 1½ feet high, pinnate leaves with setaceous linear segments, and yellow flowers.

It is indigenous to the Mediterranean region, Southern Russia and the Caucasian provinces, but is found as a cornfield weed in many other countries, and is frequently cultivated in gardens. It succeeds in Norway as far north as Throndhjem.

Dill, under the Hindustani name of Suvā or Sōyah, is largely grown in various ports of India, where the plant though of but a few months’ duration, grows to a height of 2 to 3 feet. On account of a slight peculiarity in the fruit, the Indian plant was regarded by Roxburgh and De Candolle as a distinct species, and called Anethum Sowa, but it possesses no botanical characters to warrant its separation from A. graveolens.

History—Dill is commonly regarded to be the Ἄνηθον of Dioscorides, the Anethum of Palladius and other ancient writers, as well as of the New Testament. In Greece the name Ἄνηθον is at present applied to a plant of very similar appearance, Carum Ridolfia Benth. et Hook (Anethum segetum L.). By the later Greeks, the term Ἄνηθον was also used for dill.

Dill, as well as coriander, fennel, cumin, and ammi, was in frequent requisition in Britain in Anglo-Saxon times. The name is derived according to Prior from the old Norse word dilla, to lull, in allusion to the reputed carminative properties of the drug. However this may be, we find the word occurring in the 10th century in the Vocabulary of Alfric, archbishop of Canterbury. The words dill and till, undoubtedly meaning this drug, were also used in Germany and Switzerland as early as a.d. 1000.

Description—The fruit, which has the characters usual to Umbelliferæ, is of ovoid form, much compressed dorsally, surrounded with a broad flattened margin. The mericarps about ⅒ of an inch wide, are mostly separate; they are provided with 5 equidistant, filiform ridges, of which the two lateral lose themselves in the paler, broad, thin margin. The three others are sharply keeled; the darkest space between them is occupied by a vitta and two occur on the commissure. In the Indian drug, the mericarps are narrower and more convex, the ridges more distinct and pale, and the border less winged. In other respects it accords with that of Europe. The odour and taste of dill are agreeably aromatic.

Microscopic Characters—The pericarp is formed of a small number of flattened cells, which in the inner layer are of a brown colour; the ridges consist as usual of a strong fibro-vascular bundle. The vittæ in a transverse section present an elliptic outline ¹/₁₄₀ of an inch or less in diameter. The margin of the mericarp is built up of porous, parenchymatous tissue. The albumen as in the seeds of all umbellifers, consists of thick-walled, angular cells, loaded with fatty oil, and globular grains of albuminous matters which present a dark cross when examined by polarized light.

Chemical Composition—Dill fruit yields from 3 to 4 per cent. of an essential oil, the largest proportion of which was found by Gladstone (1864-1872) to be a hydrocarbon, C₁₀H₁₆, to which he gave the name Anethene. This substance has a lemon-like odour, sp. gr. ·846, and boils at 172° C. It deviates a ray of polarized light strongly to the right. Nietzki (1874) ascertained that there is, moreover, present another hydrocarbon, C₁₀H₁₆, in a very small proportion, which boils at 155-160°. A third constituent of oil of dill is in all probability identical with carvol (see page 307); we prepared from the former immediately the crystals (C₁₀H₁₄O)₂SH₂.

Uses—The distilled water of dill is stomachic and carminative, and frequently prescribed as a vehicle for more active medicines. The seeds are much used for culinary and medicinal purposes by the people of India, but are little employed in Continental Europe.

Fructus Coriandri.

Semen Coriandri; Coriander Fruits, Coriander Seeds, Corianders; F. Fruits de Coriandre; G. Koriander.

Botanical Origin—Coriandrum sativum L., a small glabrous, annual plant, apparently indigenous to the Mediterranean and Caucasian regions, not known growing wild, but now found as a cornfield weed throughout the temperate parts of the Old World. It is cultivated in many countries, and has thus found its way even to Paraguay. In England the cultivation of coriander has long been carried on, but only to a very limited extent.

History—Coriander appears to occur in the famous Egyptian papyrus Ebers; it is also mentioned, under the name of Kustumburu, in early Sanskrit authors, and is also met with in the Scriptures.

The plant owes its names Κόριον, Κορίαννον, and Κοριάνδρον, or also in the middle ages, Κλάνδρον, to the offensive odour it exhales when handled, and which reminds one of bugs,—in Greek Κόρις. This character caused it to be regarded in the middle ages as having poisonous properties. The ripe fruits which are entirely free from the fœtid smell of the growing plant, were used as a spice by the Jews and the Romans, and in medicine from a very early period. Cato, who wrote on agriculture in the 3rd century b.c., notices the cultivation of coriander. Pliny states that the best is that of Egypt. It is of frequent occurrence in the book “De opsoniis et condimentis” of Apicius Cœlius, about the 3rd century of our era. Coriander is also included in the list of Charlemagne, alluded to pages 92, 98, etc.

Coriander was well known in Britain prior to the Norman Conquest, and often employed in ancient Welsh and English medicine and cookery.

Cultivation—Coriander, called by the farmers Col, is cultivated in the eastern counties of England, especially in Essex. It is sometimes sown with caraway, and being an annual is gathered and harvested the first year, the caraway remaining in the ground. The seedling plants are hoed so as to leave those that are to remain in rows 10 to 12 inches apart. The plant is cut with sickles, and when dry the seed is thrashed out on a cloth in the centre of the field. On the best land, 15 cwt. per acre is reckoned an average crop.

Description—The fruit of coriander consists of a pair of hemispherical mericarps, firmly joined so as to form an almost regular globe, measuring on an average about ⅕ of an inch in diameter, crowned by the stylopodium and calycinal teeth, and sometimes by the slender diverging styles. The pericarp bears on each half, 4 perfectly straight sharpish ridges, regarded as secondary (juga secundaria); two other ridges, often of darker colour, belonging to the mericarps in common, the separation of which takes place in a rather sinuous line. The shallow depression between each pair of these straight ridges is occupied by a zigzag raised line (jugum primarium), of which there are therefore 5 in each mericarp. It will thus be seen that each mericarp has 5 (zigzag) so-called primary ridges, and 4 (keeled and more prominent) secondary, besides the lateral ridges which mark the suture or line of separation. There are no vittæ on the outer surface of the pericarp. Of the 5 teeth of the calyx, 2 often grow into long, pointed, persistent lobes; they proceed from the outer flowers of the umbel.

Though the two mericarps are closely united, they adhere only by the thin pericarp, enclosing when ripe a lenticular cavity. On each side of this cavity, the skin of the fruit separates from that of the seed, displaying the two brown vittæ of each mericarp. In transverse section, the albumen appears crescent-shaped, the concave side being towards the cavity. The carpophore stands in the middle of the latter as a column, connected with the pericarp only at top and bottom.

Corianders are smooth and rather hard, in colour buff or light brown. They have a very mild aromatic taste, and, when crushed, a peculiar fragrant smell. When unripe, their odour, like that of the fresh plant, is offensive. The nature of the chemical change that occasions this alteration in odour has not been made out.

The Indian corianders shipped from Bombay are of large size and of elongated form.

Microscopic Structure—The structural peculiarities of coriander fruit chiefly refer to the pericarp. Its middle layer is made up of thick walled ligneous prosenchyme, traversed by a few fibro-vascular bundles which in the zigzag ridges vary exceedingly in position.

Chemical Composition—The essential oil of coriander has a composition indicated by the formula C₁₀H₁₈O, and is therefore isomeric with borneol. If the elements of water are abstracted by phosphoric anhydride, it is converted, according to Kawalier (1852), into an oil of offensive odour, C₁₀H₁₆.

The fruits yield of volatile oil from 0·7 to 1·1 per cent.; as the vittæ are well protected by the woody pericarp, corianders should be bruised before being submitted to distillation. Trommsdorff (1835) found the fruits to afford 13 per cent. of fixed oil.

The fresh herb distilled in July when the fruits were far from ripe, yielded to one of us (F.) from 0·57 to 1·1 per mille of an essential oil possessing in a high degree the disagreeable odour already alluded to. This oil was found to deviate the ray of polarized light 1·1° to the right when examined in a column 50 mm. long. The oil distilled by us from ripe commercial fruit deviated 5·1° to the right.

Production and Commerce—Coriander is cultivated in various parts of Continental Europe, and, as already stated, to a small extent in England. It is also produced in Northern Africa and in India. In 1872-73, the export of coriander from the province of Sind was 948cwt.; from Bombay in the same year 619 cwt. From Calcutta there were shipped in 1870-71, 16,347 cwt.

Uses—Coriander fruits are reputed stimulant and carminative, yet are but little employed in medicine. They are however used in veterinary practice, and by the distillers of gin, also in some countries in cookery.

Fructus Cumini.

Fructus vel Semen Cymini; Cumin or Cummin Fruits, Cummin Seeds; F. Graines de Cumin; G. Mutterkümmel, Kreuzkümmel, Langer oder Römischer Kümmel, Mohrenkümmel.

Botanical Origin.—Cuminum Cyminum L., a small annual plant, indigenous to the upper regions of the Nile, but carried at an early period by cultivation to Arabia, India and China, as well as to the countries bordering the Mediterranean. The fruits of the plant ripen as far north as Southern Norway; but in Europe, Sicily and Malta alone produce them in quantity.

History—Cumin was well known to the ancients; it is alluded to by the Hebrew prophet Isaiah, and is mentioned in the gospel of Matthew as one of the minor titheable productions of the Holy Land. Under the name Κύμινον, it is commended for its agreeable taste by Dioscorides, in whose day it was produced on the coasts of Asia Minor and Southern Italy. It is named as Cuminum by Horace and Persius; Scribonius Largus, in the first century of our era, mentions Cuminum æthiopicum, silvaticum and thebaicum.

During the middle ages, cumin was one of the spices in most common use. Thus in a.d. 716, an annual provision of 150 lb. of cumin for the monastery of Corbie in Normandy, was not thought too large a supply. Edrisi mentioned cumin as a product of Morocco (see article Fructus Carui, p. 305), Algeria and Tunisia. It was in frequent use in England, its average price between 1264 and 1400 being a little over 2d. per lb. Cumin is enumerated in the Liber albus of the city of London, compiled in 1419, among the merchandize on which the king levied the impost called scavage. It is mentioned in 1453 as one of the articles of which the Grocers’ Company had the weighing and oversight, and was classed in 1484 in the same way in the German warehouse in Venice.

Description—The fruit, the colour of which is brown, has the usual structure of the order; it is of an elongated ovoid form, tapering towards each end, and somewhat laterally compressed. The mericarps, which do not readily separate from the carpophore, are about ¼ of an inch in length and ⅒ of an inch in greatest breadth. Each has 5 primary ridges which are filiform, and scabrous or muriculate, and 4 secondary covered with rough hairs. Between the primary ridges is a single elongated vitta, and 2 vittæ occur on the commissural surface. A transverse section of the seed shows a reniform outline. There is a form of C. Cyminum in cultivation, the fruit of which is perfectly glabrous.

Cumin has a strong aromatic taste and smell, far less agreeable than that of caraway.

Microscopic Structure—The hairs are rather brittle, sometimes ½ mm. in length, formed of cells springing from the epidermis. The larger consists of groups of cells, vertically or laterally combined, and enclosed by a common envelope; the smaller of but a single cell ending in a rounded point. The whole pericarp is rich in tannic matter, striking with salts of iron a dark greenish colour.

The tissue of the seed is loaded with colourless drops of a fatty oil; the vittæ with a yellowish-brown essential oil. But the most striking contents of the parenchyme of the albumen consist of transparent, colourless, spherical grains, 7 to 5 mkm. in diameter, several of which are enclosed in each cell. Under a high magnifying power, they show a central cavity with a series of concentric layers around it, frequently traversed by radial clefts. Examined in polarized light, these grains display exactly the same cross as is seen in granules of starch, although their behaviour with chemical tests at once proves that they are by no means that substance; in fact iodine does not render them blue, but intensely brown. Grains of the same character, assuming sometimes a crystalloid form, occur in most umbelliferous fruits, and in many seeds of other orders. All these bodies are composed of albuminous and fatty matters; the more crystalloid form as met with in the seeds of Ricinus and in the fruit of parsley, is the body called by Hartig Aleuron.

Chemical Composition—Cumin fruits yielded to Bley (1829) 7 per cent. of fat oil, 13 per cent. of resin (?), 8 of mucilage and gum, 15 of albuminous matter, and a large amount of malates. Their peculiar, strong, aromatic smell and taste, depend on the essential oil of which they afford as much as 4 per cent. It contains about 56 per cent. of

Cuminol (or Cuminaldehyde),

C₆H₄ CHO

C₃H₇ ,

a liquid of sp. gr. 0·972, boiling point 237° C. It has also been met with, in 1858, by Trapp in the oil of Cicuta virosa. By boiling cuminol with potash in alcoholic solution, cuminalcohol,

C₆H₄ CH₂OH

C₃H₇ ,

as well as the potassium salt of cuminic acid,

C₆H₄ COOH

C₃H₇ ,

are formed.

The oil of cumin, secondly, contains a mixture of hydrocarbons. That which constitutes about one-half of the crude oil has been first obtained in 1841 by Gerhardt and Cahours, just from the oil under notice, and therefore called Cymene (or also Cymol). It is a liquid of 0·873 sp. gr. at 0° (32° F.), boiling at 175°; neither cymene nor cuminol have the same odour and taste as the crude oil. Many other plants have been noticed as containing cymene among the constituents of their essential oils. Thus for instance Cicuta virosa L., Carum Ajowan (page 304), Thymus vulgaris (see art. Folia Thymi), Eucalyptus globulus Labill.

Cymene, C₆H₄ CH₃ (Propylmethyl-benzol),

C₃H₇

may also be artificially obtained from a large number of essential oils having the composition C₁₀H₁₆, or C₁₀H₁₄O, or C₁₀H₁₆O, or C₁₀H₁₈O. It differs very remarkably from the oils of the formula C₁₀H₁₆, inasmuch as cymene yields the crystallizable cymen-sulphonic acids when it is warmed with concentrated sulphuric acid.

Lastly, there is present in the oil of cumin a small amount of a terpene, C₁₀H₁₆, boiling at 155·8° C., as stated in 1865 by C. M. Warren, and in 1873 by Beilstein and Kupffer.

The dextrogyrate power of cuminol is a little less strong than that of cymene; artificial cymene is optically inert.

Commerce—Cumin is shipped to England from Mogador, Malta and Sicily. In Malta there were in 1863, 140 acres under cultivation with this crop; in 1865, 730 acres, producing 2766 cwt.

The export of cumin from Morocco in 1872 was 1657 cwt.; that from Bombay in the year 1872-73 was 6766 cwt.; and 20,040 cwt. from Calcutta in the year 1870-71.

Uses—Cumin is sold by druggists as an ingredient of curry powders, but to a much larger extent for use in veterinary medicine.

Caprifoliaceæ.

Flores Sambuci.

Elder Flowers; F. Fleurs de Sureau; G. Holunderblüthe, Fliederblumen.

Botanical Origin—Sambucus nigra L.—a large deciduous shrub or small tree, indigenous to Southern and Central Europe (not in Russia), Western Asia, the Crimea, the regions of the Caucasus and Southern Siberia. It is believed to be a native of England and Ireland, but not to be truly wild in Scotland. In other northern parts of Europe, as Norway and Sweden, the elder appears only as a plant introduced there during the middle ages by the monks.

History—The Romans, as we learn from Pliny, made use in medicine of the plant under notice as well as of the Dwarf Elder (S. Ebulus L.) Both kinds were employed in Britain by the ancient English and Welsh leeches, and in Italy in the medicine of the school of Salernum.

Description—The elder produces in the early summer, conspicuous, many-flowered cymes, 4 to 5 inches in diameter, of which the long peduncle divides into 5 branches, which subdivide once or several times by threes or fives, ultimately separating by repeated forking into slender, furrowed pedicels about ¼ of an inch long, each bearing a single flower. In the second or third furcations, the middle flower remains short-stalked or sessile, and opens sooner than the rest. In like manner, on the outermost small forks only one of the florets is usually long-stalked. The whole of this inflorescence forms a flattish umbelliform cyme, perfectly glabrous and destitute of bracts.

The calyx is combined with the ovary and bordered with 4 or 5 small teeth. The corolla, which is of a creamy white, is monopetalous with a very short tube and 5 spreading ovate lobes. The stamens which are about as long as the divisions of the corolla and alternate with them, are inserted in the tube of the latter. The yellow pollen which thickly powders the flowers, appears under the microscope 3-pored. The projecting ovary is crowned by a 2-or 3-lobed sessile stigma.

For use in pharmacy, the part of the flower most desirable is the corolla, to obtain a good proportion of which the gathered cymes are left for a few hours in a large heap; the mass slightly heats, the corollas detach themselves, and are separated from the green stalks by shaking, rubbing, and sifting; they require to be then rapidly dried. This done, they become much shrivelled and assume a dull yellow tint. When fresh, they have a sweet faint smell, which becomes stronger and somewhat different by drying, and is quite unlike the repulsive odour of the fresh leaves and bark. Dried elder flowers have a bitterish, slightly gummy flavour. On the Continent they are sold with the stalks, i.e. in entire cymes.

Chemical Composition—Elder flowers yield a very small percentage of a butter-like essential oil, lighter than water, and smelling strongly of the flowers; it is easily altered by exposure to the air. The oil is accompanied by traces of volatile acids.

Uses—Elder flowers are only employed in British medicine for making an aromatic distilled water, and for communicating a pleasant odour to lard (Unguentum Sambuci). The flowers of Sambucus canadensis L. indigenous in the United States, which are extremely similar to those of our species, appear to be more fragrant. The leaves of the latter are sometimes used for giving a fine green tint to oil or fat, as in the Oleum viride and Unguentum Sambuci foliorum of the shops. The bark, once much employed, is now obsolete.

Rubiaceæ.

Gambier.

Catechu pallidum, Extractum Uncariæ; Gambier, Pale Catechu, Gambier Catechu, Terra Japonica; F. Gambir, Cachou jaune; G. Gambir.

Botanical Origin—1. Uncaria Gambier Roxb. (Nauclea Gambir Hunter) a stout climbing shrub, supporting itself by means of its flower-stalks which are developed into strong recurved hooks. It is a native of the countries bordering the Straits of Malacca, and especially of the numerous islands at their eastern end; but according to Crawfurd it does not seem indigenous to any of the islands of the volcanic band. It also grows in Ceylon, where however no use is made of it.

2. U. acida Roxb., probably a mere variety of the preceding, and growing in the Malayan islands, appears to be used in exactly the same manner.

History—Gambier is one of the substances to which the name of Catechu or Terra Japonica is often applied; the other is Cutch, which has been already described (p. 243). By druggists and pharmaceutists the two articles are frequently confounded, but in the great world of commerce they are reckoned as quite distinct. In many price-currents and trade-lists, Catechu is not found under that name, but only appears under the terms Cutch and Gambier.

Crawfurd asserts that gambier has been exported from time immemorial to Java from the Malacca Straits. This statement appears highly questionable. Rumphius, who resided in Amboyna during the second half of the 17th century, was a merchant, consul and naturalist; and in these capacities became thoroughly conversant with the products of the Malay Archipelago and adjacent regions, as the six folio volumes of his Herbarium Amboinense, illustrated by 587 plates, amply prove.

Among other plants, he figures Uncaria Gambier, which he terms Funis uncatus, and states to exist under two varieties, the one with broad, and the other with narrow leaves. The first form, he says, is called in Malay Daun Gatta Gambir, on account of the bitter taste of its leaves, which is perceptible in the lozenges (trochisci) called Gatta Gambir, so much so that one might suppose they were made from these leaves, which however is not the case. He further asserts that the leaves have a detergent, drying quality by reason of their bitterness, which is nevertheless not intense but quite bearable in the mouth: that they are masticated instead of Pinang [Betel-nut] with Siri [leaf of Piper Betle] and lime: that the people of Java and Bali plant the first variety near their houses for the sake of its fragrant flowers; but though they chew its leaves instead of Pinang, it must not be supposed that it is this plant from which the lozenges Gatta are compounded, for that indeed is quite different.

Thus, if we may credit Rumphius, it would seem that the important manufacture of gambier had no existence at the commencement of the last century. As to “Gatta Gambir,” his statements are scarcely in accord with those of more recent writers. We may however remark that that name is very like the Tamil Katta Kāmbu, signifying Catechu, which drug is sometimes made into little round cakes, and was certainly a large export from India to Malacca and China as early as the 16th century (p. 241).

That gambier was unknown to Europeans long after the time of Rumphius, is evident from other facts. Stevens, a merchant of Bombay, in his Compleat Guide to the East India Trade, published in 1766, quotes the prices of goods at Malacca, but makes no allusion to gambier. Nor is there any reference to it in Savary’s Dictionnaire de Commerce (ed. of 1750), in which Malacca is mentioned as the great entrepôt of the trade of India with that of China and Japan.

The first account of gambier known to us, was communicated to the Batavian Society of Arts and Sciences in 1780, by a Dutch trader named Couperus. This person narrates how the plant was introduced into Malacca from Pontjan in 1758, and how gambier is made from its leaves; and names several sorts of the drug and their prices.

In 1807, a description of “the drug called Gutta Gambeer,” and of the tree from which it is made, was presented to the Linnean Society of London. The writer, William Hunter, well known for scientific observations in connection with India, states that the substance is made chiefly at Malacca, Siak and Rhio, that it is in the form of small squares, or little round cakes almost perfectly white, and that the finer sorts are used for chewing with betel leaf in the same manner as catechu, while the coarser are shipped to Batavia and China for use in tanning and dyeing.

Manufacture—The gambier plant is cultivated in plantations. These were commenced in 1819 in Singapore, where there were at one time 800 plantations; but owing to scarcity of fuel, without an abundant supply of which the manufacture is impossible, and dearness of labour, gambier-planting was in 1866 fast disappearing from the island. The official Blue Book, printed at Singapore in 1872, reports it as “much increased.” It is largely pursued on the mainland (Johore), and in the islands of the Rhio-Lingga Archipelago, lying south-east of Singapore. On the island of Bintang, the most northerly of the group, there were about 1,250 gambier-plantations in 1854.

The plantations are often formed in clearings of the jungle, where they last for a few years and are then abandoned, owing to the impoverishment of the soil and the irrepressible growth of the lalang grass (Imperata Kœnigii P. de B.), which is more difficult to eradicate than even primæval jungle. It has been found profitable to combine with the cultivation of gambier that of pepper, for which the boiled leaves of the gambier form an excellent manure.

The gambier plants are allowed to grow 8 to 10 feet high, and as their foliage is always in season, each plant is stripped 3 or 4 times in the year. The apparatus and all that belongs to the manufacture of the extract are of the most primitive description. A shallow cast-iron pan about 3 feet across is built into an earthen fireplace. Water is poured into the pan, a fire is kindled, and the leaves and young shoots, freshly plucked, are scattered in, and boiled for about an hour. At the end of this time they are thrown on to a capacious sloping trough, the lower end of which projects into the pan, and squeezed with the hand so that the absorbed liquor may run back into the boiler. The decoction is then evaporated to the consistence of a thin syrup, and baled out into buckets. When sufficiently cool it is subjected to a curious treatment:—instead of simply stirring it round, the workman pushes a stick of soft wood in a sloping direction into each bucket; and placing two such buckets before him, he works a stick up and down in each. The liquid thickens round the stick, and the thickened portion being constantly rubbed off, while at the same the whole is in motion, it gradually sets into a mass, a result which the workman affirms would never be produced by simple stirring round. Though we are not prepared to concur in the workman’s opinion, it is reasonable to suppose that his manner of treating the liquor favours the crystallization of the catechin in a more concrete form than it might otherwise assume. The thickened mass, which is said by another writer to resemble soft yellowish clay, is now placed in shallow square boxes, and when somewhat hardened is cut into cubes and dried in the shade. The leaves are boiled a second time, and finally washed in water, which water is saved for another operation.

From informations obtained in 1878 it would appear that now the prevailing part of gambier is made by means of pressure into blocks.

A plantation with five labourers contains on an average 70,000 to 80,000 shrubs, and yields 40 to 50 catties (1 catty = 1⅓ lb. = 604·8 grammes) of gambier daily.

Description—Gambier is an earthy-looking substance of light brown hue, consisting of cubes about an inch each side, more or less agglutinated, or it is in the form of entirely compact masses. The cubes are externally of a reddish-brown and compact, internally of a pale cinnamon hue, dry, porous, friable, devoid of odour, but with a bitterish astringent taste, becoming subsequently sweetish. Under the microscope, the cubes of gambier are seen to consist of very small acicular crystals.

Chemical Composition—In a chemical point of view, gambier agrees with cutch, especially with the pale variety made in Northern India (p. 242). Both substances consist mainly of Catechin, which may be obtained in the hydrated state as slender colourless needles, by exhausting gambier with cold water, and crystallizing the residue from 3 or 4 parts of hot water, which on cooling deposits nearly all the catechin. Ferric chloride strikes with the solution of catechin, even when much diluted, a green tint. If it is shaken with ferrous sulphate and an extremely small quantity of bicarbonate of sodium, a violet colour makes its appearance. The same reactions are produced by various substances of the tannic class.

The yellowish colouring matter of gambier was determined by Hlasiwetz (1867) and Löwe (1873) to be Quercetin, which is also a constituent of cutch. Quercetin is but very sparingly soluble in water, yet it is nevertheless found, in small quantity, in the aqueous extract of cutch, from which it may be removed by means of ether. As many species of Nauclea contain, according to De Vry, Quinovic Acid, it is probable that that substance may be detected in gambier.

Some fine gambier in regular cubes which we incinerated left 2·6 per cent. of ash, consisting mainly of carbonates of calcium and magnesium.

Commerce—Singapore, which is the great emporium for gambier, exported in 1871 no less than 34,248 tons, of which quantity 19,550 tons had been imported into the colony chiefly from Rhio and the Malayan Peninsula. In 1876 the export had increased to more than 50,000 tons of pressed block gambier and 2,700 tons of cubes. In 1877 it diminished to 39,117 tons, owing to difficulties which had arisen between the Chinese dealers, who supplied the drug in a rather wet state, and the European exporters. Of the above quantity 21,607 tons were shipped for London, 7,572 for Liverpool, 2,345 for Marseilles. Gambier usually fetches a lower price in the London market than cutch.

The quantity imported into the United Kingdom in 1872 was 21,155 tons, value £451,737, almost the whole being from the Straits Settlements.

Uses—Gambier, under the name of Catechu, is used medicinally as an astringent, but the quantity thus consumed is as nothing in comparison with that employed for tanning and dyeing.

Cortex Cinchonæ.

Cortex Peruvianus, Cortex Chinæ; Cinchona Bark, Peruvian Bark; F. Ecorce de Quinquina; G. Chinarinde.

Botanical Origin—The genus Cinchona constitutes together with Cascarilla (including Buena and Cosmibuena), Remijia, Ladenbergia, Macrocnemum, and about 30 other nearly allied genera, the well-characterized tribe Cinchoneæ of the order Rubiaceæ. This tribe consists of shrubs or trees with opposite leaves, 2-celled ovary, capsular fruit, and numerous minute, vertical or ascending, peltate, winged, albuminous seeds.

(A.) Remarks on the genus.—The genus Cinchona is distinguished by deciduous stipules, flowers in terminal panicles, 5-toothed superior calyx, tubular corolla expanding into 5 lobes fringed at the margin. The corolla is of an agreeable weak odour, and of a rosy or purplish hue or white. The fruit is a capsule of ovoid or subcylindrical form, dehiscing from the base (the fruit-stalk also splitting) into two valves, which are held together at the apex by the thick permanent calyx. The seeds, 30 to 40 in number, are imbricated vertically; they are flat, winged all round by a broad membrane, which is very irregularly toothed or lacerated at the edge.

The Cinchonas are evergreen, with finely-veined leaves, traversed by a strong midrib. The thick leafstalk, often of a fine red, is sometimes a sixth the length of the whole leaf, but usually shorter. The leaves are ovate, obovate, or nearly circular; in some species lanceolate, rarely cordate, always entire, glabrous or more rarely hirsute, often variable as to size and form in the same species.

Among the valuable species, several are distinguished by small pits called scrobiculi, situated on the under side of the leaf, in the axils of the veins which proceed from the midrib. These pits sometimes exude an astringent juice. In some species they are replaced by tufts of hair. The young leaves are sometimes purplish on the under side; in several species the full-grown foliage assumes before falling, rich tints of crimson or orange.

The species of Cinchona are so much alike that their definition is a matter of the utmost difficulty, and only to be accomplished by resorting to a number of characters which taken singly are of no great importance. Individual species are moreover frequently connected together by well-marked and permanent intermediate forms, so that according to the expression of Howard, the whole form a continuous series, the terminal members of which are scarcely more sharply separated from the allied genera, than from plants of their own series.

As to the number and value of the species known, there is some diversity of view. Weddell, in 1870, enumerated 33 species and 18 sub-species, besides numerous varieties and sub-varieties. Bentham and Hooker, in 1873, estimated the species as about 36.

Kuntze, in the book quoted at the end of the present article, proposed to reduce all the species to the four following:

1. Cinchona Weddelliana O. Kuntze, nearly answering to C. Calisaya Weddell.

2. C. Pavoniana O. Kuntze, including C. micrantha Ruiz and Pavon and several allied plants.

3. C. Howardiana O. Kuntze, constituted of C. succirubra Pavon and a few other species of former authors.

4. C. Pahudiana Howard.

Kuntze, who has examined the living Cinchonæ as cultivated in India, is of the opinion that all the numerous forms hitherto observed, both in the wild plants and in cultivation, are merely either belonging to the above four species or deriving from them chiefly by hybridation. Though much in favour of a reduction of the species, we are not yet prepared to accept Kuntze’s arrangement.

(B.) Area, Climate and Soil.—The Cinchonas are natives of South America, where they occur exclusively on the western side of the continent between 10° N. lat. and 22° S. lat., an area which includes portions of Venezuela, New Granada, Ecuador, Peru, and Bolivia.

The plants are found in the mountain regions, no species whatever being known to inhabit the low alluvial plains. In Peru and Bolivia, the region of the Cinchona forms a belt, 1300 miles in length, occupying the eastern slope of the Cordillera of the Andes. In Ecuador and New Granada, the tree is not strictly limited to the eastern slopes, but occurs on other of the Andine ranges.

The average altitude of the cinchoniferous region is given by Weddell as 5,000 to 8,000 feet above the sea-level. The highest limit, as noted by Karsten, is 11,000 feet. One valuable species, C. succirubra, occurs exceptionally as low as 2,600 feet. Generally, it may be said that the altitude of the Cinchona zone decreases in proportion as it recedes from the equator, and that the most valuable sorts are not found lower than 5,000 feet.

The climate of the tropical mountain regions in which the Cinchonas flourish, is extremely variable,—sunshine, showers, storms, and thick mist, alternating in rapid succession, yet with no very great range of temperature. A transient depression of the thermometer even to the freezing point, and not unfrequent hail-showers, may be borne without detriment by the more hardy species. Yet the mean temperature most favourable for the generality of species, appears to be 12 to 20° C. (54 to 68° F.)

Climatic agencies appear to influence the growth of Cinchona far more than the composition of the soil. Though the tree occurs in a great variety of geological formations, there is no distinct evidence that these conditions control in any marked manner either the development of the tree or the chemical constitution of its bark. Manure on the other hand, though not increasing perceptibly luxuriance of growth, has a decided effect in augmenting the richness of the bark in alkaloids.

(C.) Species yielding officinal barks.—The Cinchona Barks of commerce are produced by about a dozen species; of these barks the greater number are consumed solely in the manufacture of quinine. Those admitted for pharmaceutical use are afforded by the following species:—

1. Cinchona officinalis Hooker—A native of Ecuador and Peru, existing under several varieties. It forms a large tree, having lanceolate or ovate leaves, usually pointed, glabrous, and shining on the upper surface, and scrobiculate on the under. The flowers are small, pubescent and in short lax panicles, and are succeeded by oblong or lanceolate capsules, ½ an inch or more in length.

2. C. Calisaya Weddell—Discovered by Weddell in 1847, although its bark had been an object of commerce since the latter half of the previous century.

The tree inhabits the warmest woods of the declivities which border the valleys of Bolivia and South-eastern Peru, at an altitude of 5000 to 6000 feet above the sea-level. More precisely, the chief localities for the tree are the Bolivian provinces of Enquisivi, Yungas de la Paz, Larecaja or Sorata, Caupolican or Apolobamba, and Muñecas: thence it passes northward into the Peruvian province of Carabaya, suddenly ceasing on the confines of the valley of Sandia, although, as Weddell observed, the adjacent valleys are to all appearance precisely similar.

When well grown, C. Calisaya has a trunk often twice as thick as a man’s body, and a magnificent crown of foliage overtopping all other trees of the forest. It has ovate capsules of about the same length (½ an inch) as the elegant pinkish flowers, which are in large pyramidal panicles. The leaves are 3 to 6 inches long, of very variable form, but usually oblong and obtuse, rarely acute.

A variety named after Joseph de Jussieu who first noticed it, β. Josephiana, but known in the country as Ichu-Cascarilla or Cascarilla del Pajonal, differs from the preceding in that it is a shrub, 6 to 10 feet high, growing on the borders of mountain meadows and of thickets in the same regions as the larger form.

Other forms known in Bolivia as Calisaya zamba, morada, verde or alta, and blanca, have been distinguished by Weddell as varieties of C. Calisaya.

Towards the middle of the year 1865, Charles Ledger, an English traveller, obtained seeds of a superior Cinchona, which had been collected near Pelechuco, eastwards of the lake Titicaca, about 68° W. long. and 15° S. lat., in the Bolivian province of Caupolican. In the same year the seeds arrived in England, but were subsequently sold to the Dutch government, and raised with admirable success in Java, and a little later also in private plantations in British India. The bark of “Cinchona Ledgeriana” has since proved by far the most productive in quinine of all Cinchona Barks. The tree is a mere form of C. Calisaya.

3. C. succirubra Pavon,—a magnificent tree, 50 to 80 feet high, formerly growing in all the valleys of the Andes which debouch in the plain of Guayaquil. The tree is now almost entirely confined to the forests of Guaranda on the western declivities of Chimborazo, at 2,000 to 5,000 feet above the level of the sea.

The bark appears to have been appreciated in its native country at an early period, if we may conclude that the Red Bark mentioned by La Condamine in 1737 was that under notice. It would seem, however, to have scarcely reached Europe earlier than the second half of the last century. The tree has broadly oval leaves, attaining about a foot in length, nearly glabrous above, pubescent beneath, large terminal panicles of rosy flowers, succeeded by oblong capsules 1 to 1¼ inches long.

The other species of Cinchona, the bark of which is principally consumed by the manufacturers of quinine, will be found briefly noticed, together with the foregoing, in the conspectus at page 355.

History—The early native history of Cinchona is lost in obscurity. No undoubted proofs have been handed down, to show that the aborigines of South America had any acquaintance with the medicinal properties of the bark. But traditions are not wanting.

William Arrot, a Scotch surgeon who visited Peru in the early part of the last century, states that the opinion then current at Loxa was that the qualities and use of the barks of Cinchona were known to the Indians before any Spaniard came among them. Condamine, as well as Jussieu, heard the same statements, which appear to have been generally prevalent at the close of the 17th century.

It is noteworthy, on the other hand, that though the Peruvians tenaciously adhere to their traditional customs, they make no use at the present day of Cinchona bark, but actually regard its employment with repugnance.

Humboldt declares that at Loxa the natives would rather die than have recourse to what they consider so dangerous a remedy. Pöppig (1830) found a strong prejudice to prevail among the people of Huanuco against Cinchona as a remedy for fevers, and the same fact was observed farther north by Spruce in 1861. The latter traveller narrates, that it was impossible to convince the cascarilleros of Ecuador that their Red Bark could be wanted for any other purpose than dyeing cloth; and that even at Guayaquil there was a general dislike to the use of quinine.

Markham notices the curious fact that the wallets of the native itinerant doctors, who from father to son have plied their art since the days of the Incas, never contain cinchona bark.

Although Peru was discovered in 1513, and submitted to the Spanish yoke by the middle of the century, no mention has been found of the febrifuge bark with which the name of the country is connected, earlier than the commencement of the 17th century.

Joseph de Jussieu, who visited Loxa in 1739, relates that the use of the remedy was first made known to a Jesuit missionary, who being attacked by intermittent fever, was cured by the bark administered to him by an Indian cacique at Malacotas, a village near Loxa. The date of this event is not given. The same story is related of the Spanish corregidor of Loxa, Don Juan Lopez Canizares, who is said to have been cured of fever in 1630.

Eight years later, the wife of the viceroy of Peru, Luis Geronimo Fernandez de Cabrera y Bobadilla, fourth count of Chinchon, having been attacked with fever, the same corregidor of Loxa sent a packet of powdered bark to her physician Juan de Vega, assuring him of its efficacy in the treatment of “tertiana.” The drug fully bore out its reputation, and the countess Ana was cured. Upon her recovery, she caused to be collected large quantities of the bark, which she used to give away to those sick of fever, so that the medicine came to be called Polvo de la Condesa, i.e. The Countess’ Powder. It was certainly known in Spain the following year (1639), when it was first tried at Alcala de Henares near Madrid.

The introduction of Peruvian Bark into Europe is described by Chifflet, physician to the archduke Leopold of Austria, viceroy of the Netherlands and Burgundy, in his Pulvis Febrifugus Orbis Americani ventilatus, published at Brussels in 1653 (or 1651?). He says that among the wonders of the day, many reckon the tree growing in the kingdom of Peru, which the Spaniards call Polo de Calenturas, i.e. Lignum febrium. Its virtues reside chiefly in the bark, which is known as China febris, and which taken in powder drives off the febrile paroxysms. He further states, that during the last few years the bark has been imported into Spain, and thence sent to the Jesuit Cardinal Joannes de Lugo at Rome. Chifflet adds, that it has been carried from Italy to Belgium by the Jesuit Fathers going to the election of a general, but that it was also brought thither direct from Peru by Michael Belga, who had resided some years at Lima.

Chifflet, though candidly admitting the efficacy of the new drug when properly used, was not a strong advocate for it; and his publication started an acrimonious controversy, in which Honoratius Faber, a Jesuit (1655), Fonseca, physician to Pope Innocent X., Sebastiano Bado of Genoa (1656 and 1663), and Sturm (1659) appeared in defence of the febrifuge; while Plempius (1655), Glantz, an imperial physician of Ratisbon (1653), Godoy, physician to the king of Spain (1653), René Moreau (1655), Arbinet and others contended in an opposite sense.

From one of these disputants, Roland Sturm, a doctor of Louvain, who wrote in 1659, we learn that four years previously, some of the new febrifuge had been sent by the archduke Leopold to the Spanish ambassador at the Hague, and that he (Sturm) had been required to report upon it. He further states, that the medicine was known in Brussels and Antwerp as Pulvis Jesuiticus, because the Jesuit Fathers were in the habit of administering it gratis to indigent persons suffering from quartan fever; but that it was more commonly called Pulvis Peruanus or Peruvianam Febrifugum. At Rome it bore the name of Pulvis eminentissimi Cardinalis de Lugo, or Pulvis patrum; the Jesuits at Rome received it from the establishments of their order in Peru, and used to give it away to the poor in Cardinal de Lugo’s palace. In 1658 Sturm saw 20 doses sent to Paris which cost 60 florins. He gives a copy of the handbill of 1651 which the apothecaries of Rome used to distribute with the costly powder.

The drug began to be known in England about 1655. The Mercurius Politicus one of the earliest English newspapers, contains in several of its numbers for 1658, a year remarkable for the prevalence in England of an epidemic remittent fever, advertisements offering for sale—“the excellent powder known by the name of the Jesuit’s Powder”—brought over by James Thomson, merchant of Antwerp.

Brady, professor of physic at Cambridge, prescribed bark about this time; and in 1660, Willis, a physician of great eminence, reported it as coming into daily use. This is also evidenced, with regard to the continent, by the pharmaceutical tariffs of the cities of Leipzig and Frankfurt of the year 1669, where “China Chinæ” has a place. ⅛ of an ounce (a “quint”) is quoted in the latter at 50 kreuzers (about 1s. 6d.), whereas the same quantity of opium is valued at 4 kreuzers, camphor 2 kreuzers, balsam of Peru 8 kreuzers.

Among those who contributed powerfully to the diffusion of the new medicine, was Robert Talbor alias Tabor. In his “Pyretologia” (see Appendix, T.) he by no means intimates that his method of cure depends on the use of bark. On the contrary, he cautions his readers against the dangerous effects of Jesuit’s Powder when administered by unskilful persons, yet admits that, properly given, it is a “noble and safe medicine.”

Talbor’s reputation increasing, he was appointed in 1678 physician in ordinary to Charles II., and in 1679, the king being ill of tertian fever at Windsor, Talbor cured him by his secret remedy. He acquired similar favour in France, and upon Talbor’s death (1681), Louis XIV. ordered the publication of his method of cure, which accordingly appeared by Nicolas de Blegny, surgeon to the king. This was immediately translated into English, under the title of The English Remedy: or, Talbor’s Wonderful Secret for Cureing of Agues and Feavers.—Sold by the Author Sir Robert Talbor to the most Christian King and since his Death, ordered by his Majesty to be published in French, for the benefit of his subjects, and now translated into English for Publick Good (Lond. 1682).

Cinchona bark was now accepted into the domain of regular medicine, though its efficacy was by no means universally acknowledged. It first appeared in the London Pharmacopœia in 1677, under the name of Cortex Peruanus.

For the first accurate information on the botany of Cinchona, science is indebted to the French.

Charles-Marie de la Condamine, while occupied in common with Bouguer and Godin, as an astronomer from 1736 to 1743, in measuring the arc of a degree near Quito, availed himself of the opportunity to investigate the origin of the famous Peruvian Bark. On the 3rd and 4th of February, 1737, he visited the Sierra de Cajanuma, 2½ leagues from Loxa, and there collected specimens of the tree now known as Cinchona officinalis var. a. Condaminea. At that period the very large trees had already become rare, but there were still specimens having trunks thicker than a man’s body. Cajanuma was the home of the first cinchona bark brought to Europe; and in early times it enjoyed such a reputation, that certificates drawn up before a notary were provided as proof that parcels of bark were the produce of that favoured locality.

Joseph de Jussieu, botanist to the French expedition with which La Condamine was connected, gathered, near Loxa in 1739, a second Cinchona subsequently named by Vahl C. pubescens, a species of no medicinal value.

In 1742 Linnæus established the genus Cinchona, and in 1753 first described the species C. officinalis, recently restored and exactly characterized by Hooker, aided by specimens supplied to him by Mr. Howard.

The cinchona trees were believed to be confined to the region around Loxa, until 1752 when Miguel de Santisteban, superintendent of the mint at Santa Fé, discovered some species in the neighbourhood of Popayan and Pasto.

In 1761 José Celestino Mutis, physician to the Marquis de la Vega, viceroy of New Granada, arrived at Carthagena from Cadiz, and immediately set about collecting materials for writing a Flora of the country. This undertaking he carried on with untiring energy, especially from the year 1782 until the end of his life in 1808,—first for seven years at Real del Sapo and Mariquita at the foot of the Cordillera de Quindiu, and subsequently at Santa Fé de Bogotá. Mutis gave up his medical appointment in 1772, for the purpose of entering a religious order, and ten years later was entrusted by the Government with the establishment and direction of a large museum of natural history, first at Mariquita, afterwards at Santa Fé.

A position similar to that of Mutis in New Granada had also been conferred in 1777 on the botanists Hipolito Ruiz and José Pavon with regard to southern Peru, whence originated the well-known Flora Peruviana et Chilensis, as well as most important direct contributions to our knowledge on the subject of Cinchona.

About the same time (1776), Renquizo (Renquifo or Renjifo) found cinchona trees in the neighbourhood of Huanuco, in the central tract of Peru, whereby the monopoly of the district of Loxa was soon broken up.

Numerous and important quinological discoveries were subsequently made by Mutis, or rather by his pupils Caldas, Zea, and Restrepo, as well as on the other hand by Ruiz and Pavon, and their successors Tafalla and Manzanilla. Mutis did not bring his labours to any definite conclusion, and his extensive botanical collections and 5,000 coloured drawings, were sent to Madrid only in 1817, and there remained in a lamentable state of neglect.

Some of his observations first appeared in print in 1793-94, under the title of El Arcano de la Quina in the Diario, a local paper of Santa Fé, and were reprinted at Madrid in 1828 by Don Manuel Hernandez de Gregorio. The botanical descriptions of the cinchonas of New Granada, forming the fourth part of the Arcano, remained forgotten and lost to science until rescued by Markham and published in 1867. The drawings belonging to the descriptions were photographed and engraved a little later, and form part of Triana’s Nouvelles Etudes sur les Quinquinas, which appeared in 1870.

The two Peruvian botanists succeeded somewhat better in securing their results. Ruiz in 1792, in his Quinologia, and in 1801 conjointly with Pavon in a supplement thereto, brought together a portion of their important labours relating to cinchona. But an essential part called Nueva Quinologia, written between 1821 and 1826, remained unpublished; and after an oblivion of over thirty years, it came by purchase into the hands of Mr. John Eliot Howard, who published it, and with rare liberality enriched it with 27 magnificent coloured plates, mostly taken from the very specimens of Pavon lying in the herbarium of Madrid.

Between the pupils of Mutis on the one hand, and those of Ruiz and Pavon on the other, there arose an acrimonious controversy regarding their respective discoveries, which has been equitably summarized by Triana in the work just mentioned.

Production—The hardships of bark-collecting in the primeval forests of South America are of the severest kind, and undergone only by the half-civilized Indians and people of mixed race, in the pay of speculators or companies located in the towns. Those who are engaged in the business, especially the collectors themselves, are called Cascarilleros or Cascadores, from the Spanish word Cascara, bark. A major-domo at the head of the collectors directs the proceedings of the several bands in the forest itself, where provisions and afterwards the produce are stowed away in huts of slight construction.

Arrot in 1736, and Weddell and Karsten in our own day, have given from personal observation a striking picture of these operations.

The cascarillero having found his tree, has usually to free its stem from the luxuriant climbing and parasitic plants with which it is encircled. This done, he begins in most cases at once to remove, after a previous beating, the sapless layer of outer bark. In order to detach the valuable inner bark, longitudinal and transverse incisions are made as high as can be reached on the stem. The tree is then felled, and the peeling completed. In most cases, but especially if previously beaten, the bark separates easily from the wood. In many localities it has to be dried by a fire made on the floor of a hut, the bark being placed on hurdles above,—a most imperfect arrangement. In Southern Peru and Bolivia however, according to Weddell, even the thickest Calisaya bark is dried in the sun without requiring the aid of the fire.

The thinner bark as it dries rolls up into tubes or quills called canutos or canutillos, while the pieces stripped from the trunks are made to dry flat by being placed one upon another and loaded with weights, and are then known as plancha or tabla. The bark of the root was formerly neglected, but is now in several instances brought into the market.

After drying, the barks are either assorted, chiefly according to size, or all are packed without distinction in sacks or bales. In some places, as at Popayan, the bark is even stamped, in order to reduce its bulk as much as possible. The dealers in the export towns enclose the bark in serons of raw bullock-hide, which, contracting as it dries, tightly compresses the contents (100 lb. or more) of the package. In many places however wooden chests are used for the packing of bark.

Conveyance to the Coast and Commercial Statistics—The ports to which bark is conveyed for shipment to Europe are not very numerous.

Guayaquil on the Pacific coast is the most important for produce of Ecuador. The quantity shipped thence in 1871 was 7,859 quintals. Pitayo bark is largely exported from Buenaventura in the Bay of Choco further north.

Payta, the most northerly port of Peru, and Callao, the port of Lima, likewise export bark, the latter being the natural outlet for the barks of Central Peru from Huanuco to Cusco.

Islay, and more particularly Arica, receive the valuable barks of Carabaya and of the high valleys of Bolivia. In 1877 the export of Arica was equal to 5100 cwt.

The barks of Peru and Bolivia find an exceptional outlet also by the Amazon and its tributaries, and are shipped to Europe from port of Brazil. Howard has given an interesting account of one of the first attempts to utilize this eastern route, made by Senr. Pedro Rada in 1868.

There is a large export of the barks of New Granada, principally from Santa Marta, whence the shipments in 1871 were 3,415,149 lb.; and in 1872, 2,758,991 lb. From the neighbouring port of Savanilla, which represents the city of Barranquilla, the sea-terminus of the navigation of the Magdalena, the export of bark in 1871 was 1,043,835 lb., value £38,715; it amounted to 2 millions of kilogrammes in 1877. All Columbia is stated, in 1877, to have shipped 3½ millions of kilogrammes of bark; yet a good deal of the excellent barks of the Columbian State of Santander, especially those of the neighbourhood of Bucaramanga, find their way to Maracaibo, taking the name of that place.

Some Cinchona bark is also shipped from Venezuela by way of Puerto Cabello.

The quantity of bark appearing in the Annual Statement of Trade as “Peruvian Bark” imported into the United Kingdom in 1872, was 28,451 cwt., valued £285,620; of which 11,843 cwt. was shipped from New Granada, 4,668 cwt. from Ecuador, and 5,829 cwt. from Peru, the remainder being entered as from the ports of Chili, Brazil, Central America and other countries. The imports into the United Kingdom in 1876 were 26,021 cwt., valued at £272,154.

Cultivation—The reckless system of bark-cutting in the forests of South America, which has resulted in the utter extermination of the tree from many localities, has aroused the attention of the Old World, and has at length prompted serious efforts to cultivate the tree on a large scale in other countries.

The idea of cultivating Cinchonas out of their native regions was advanced by Ruiz in 1792, and by Fée of Strassburg in 1824. Royle pointed out in 1839 that suitable localities for the purpose might be found in the Neilgherry Hills and probably in many other parts of India, and argued indefatigably in favour of the introduction of the tree.

The subject was also urged in reference to Java in 1837 by Fritze, director of medical affairs in that island; in 1846 by Miquel, and subsequently by other Dutch botanists and chemists.

Living Cinchonas had been taken to Algeria as early as 1849, by the intervention of the Jesuits of Cusco, but their cultivation met with no success.

Weddell in 1848 brought cinchona seeds from South America to France, and strenuously insisted on the importance of cultivating the plant. His seeds, especially those of C. Calisaya, germinated at the Jardin des Plantes in Paris, and in June 1850, living seedlings were sent to Algeria; and in April 1852, through the Dutch Government, to Java.

The first important attempts at cinchona cultivation were made by the Dutch. Under the auspices of the Colonial Minister Pahud, afterwards Governor-General of the Dutch East Indies, the botanist Hasskarl was despatched to Peru for the purpose of obtaining seeds and plants. His mission was so far successful, that a collection of plants contained in 21 Wardian cases, was shipped in August 1854 from Callao, in a frigate sent expressly to receive them. Notwithstanding every care, the plants did not reach Java in good condition; and when Hasskarl resigned his appointment in 1856, he bequeathed to his successor Junghuhn only 167 young cinchonas, though 400 specimens had been shipped from South America.

An impulse to the project of cinchona-planting was given in 1852 by Royle, in a report addressed to the East India Company, in which he pointed out that the Government of India were then spending more than £7,000 a year for Cinchona bark, in addition to about £25,000 for quinine.

After some unsatisfactory endeavours on the part of the British Government to obtain plants and seeds through the intervention of H. M. Consuls in South America, Mr. Markham offered his services, which were accepted. Markham, though not a professed botanist, was well qualified for the task by a previous acquaintance with the country and people of Peru and Bolivia, and by a knowledge of the Spanish and Quichua languages,—and even more so by a rare amount of zeal, intelligence, and forethought. Being fully aware of the difficulties of the undertaking, he earnestly insisted that nothing should be neglected which could ensure success; and in particular made repeated demands for a steam-vessel to convey the young plants across the Pacific to India, which unfortunately were not complied with. He further urged the desirableness of not confining operations to a single district, but of endeavouring to procure by different collectors all the more valuable species.

The prudence of this latter suggestion was evident, and Markham was enabled to engage the services of Richard Spruce, the distinguished botanist, then resident in Ecuador, who expressed his readiness to undertake a search for the Red Bark trees (C. succirubra) in the forests of Chimborazo. He also secured the co-operation of G. J. Pritchett for the neighbourhood of Huanuco, and of two skilful gardeners, John Weir and Robert Cross. The last named was employed in 1861 to procure seeds of C. officinalis from the Sierra de Cajanuma near Loxa, and in 1868-64 those of C. pitayensis from the province of Pitayo in Ecuador.

Markham reserved for himself the border-lands of Peru and Bolivia, in order to obtain C. Calisaya; and for this purpose started from Islay in March 1860. Arriving in the middle of April by way of Arequipa and Puno, at Curcero, the capital of the province of Carabaya, he made his way to the village of Sandia, near which he met with the first specimens of Cinchona in the form of the shrubby variety of C. Calisaya, termed Josephiana. He afterwards found the better variety a. vera, and also C. ovata R. et P., C. micrantha R. et P., and C. pubescens Vahl. Of these sorts, but chiefly of the first three, 456 plants were shipped at Islay in June 1860.

In consequence of the hostile attitude of the people, and the jealousy of the Bolivian Government, lest an important monopoly should be broken up, added to the difficulties arising from insalubrious climate and the want of roads, the obstacles encountered by Markham were very great, and no attempt could be made to wait for the ripening of the seeds of the Calisaya, which takes place in the month of August.

The expedition of Spruce was successful, but was also attended with much difficulty and danger, of which there are vivid pictures in the interesting narratives by himself and by Cross, published in the Parliamentary Returns of 1863 and 1866.

The service entrusted, to Pritchett was also efficiently performed; and he succeeded in bringing to Southampton six cases containing plants of C. micrantha and C. nitida, besides a large supply of seeds.

Some important supplies of plants and seed for British India have likewise been obtained from the Dutch plantations in Java. Seeds of C. lancifolia, the tree affording the valuable bark of New Granada, were procured through Dr. Karsten.

Previously to the arrival in India of the first consignment of plants, careful inquiries were instituted from a meteorological and geological point of view, as to the localities most adapted for the cultivation. This resulted in the selection for the first trial of certain spots among the Neilgherry (or Nilgiri) Hills on the south-west coast of India and in the Madras Presidency. Of this district, the chief town is Ootocamund (or Utakamand), situated about 60 miles south of Mysore and the same distance from the Indian Ocean. Here the first plantation was established in a woody ravine, 7,000 feet above the sea-level, a spot pronounced by Mr. Markham to be exceedingly analogous, as respects vegetation and climate, to the Cinchona valleys of Carabaya. Other plantations were formed in the same neighbourhood, and so rapid was the propagation, that in September 1866, there were more than 1½ millions of Cinchona plants on the Neilgherry Hills alone. The species that grows best there is C. officinalis.

The number was stated to be in 1872, 2,639,285, not counting the trees of private planters. The largest are about 30 feet high, with trunks over 3 feet in girth. The area of the Government plantations on the Neilgherry Hills is 950 acres.

Plantations have also been made in the coffee-producing districts of Wynaad, and in Coorg, Travancore and Tinnevelly, in all instances, we believe, as private speculations.

Cinchona plantations have been established by the Government of India in the valleys of the Himalaya in British Sikkim, and some have been started in the same region by private enterprise. In the former there were on the 31st March 1870, more than 1½ millions of plants permanently placed, the species growing best being C. succirubra and C. Calisaya. The Cinchona plantation of Rungbi near Darjiling (British Sikkim) covered in 1872 2,000 acres. In the Kangra valley of the Western Himalaya, plantations have been commenced, as well as in the Bombay Presidency, and in British Burma.

Ceylon offers favourable spots for the cultivation of Cinchona, in the mountain region which occupies the centre of the island, as at Hakgalle, near Neuera-Ellia, 5,000 feet above the sea, where a plantation was formed by Government in 1861. The production of bark has been taken up with spirit by the coffee-planters of Ceylon.

The Government of India has acted with the greatest liberality in distributing plants and seeds of Cinchona, and in promoting the cultivation of the tree among the people of India; and it has freely granted supplies of seed to other countries.

The plantations of Java commenced by Hasskarl, increased under Junghuhn’s management to such an extent, that in December 1862 there were 1,360,000 seedlings and young trees, among which however the more valuable species, as C. Calisaya, C. lancifolia, C. micrantha and C. succirubra, were by far the least numerous, whereas C. Pahudiana, of which the utility was by no means well established, amounted to over a million. The disproportionate multiplication of this last was chiefly due to its quickly yielding an abundance of seeds, and to its rapid and vigorous growth. Another defect in the early Dutch System of cultivation arose from the notion that the Cinchona requires to be grown in the shade of other trees, and to a less successful plan of multiplying by cuttings and layers.

These and other matters were the source of animated and often bitter discussions, which terminated on the one hand by the death of Junghuhn in 1864, and on the other by the skilful investigations of De Vry. This eminent chemist was despatched by the Government of Holland in 1857 to Java, that he might devote his chemical knowledge to the investigation of the natural productions of the island, including the then newly introduced Cinchona. It was March 16th, 1859, when Dr. de Vry laid before the governor-general, Mr. Pahud, the first crystals of sulphate of quinine he had prepared from bark grown in that island.

Under K. W. van Gorkom, who was appointed superintendent in 1864, the Dutch plantations have assumed a very prosperous state. J. C. Bernelot Moens, the present director, stated that at the end of 1878 the leading species was Calisaya in its various forms, including more than 400,000 plants of Ledger’s Calisaya. Numerous analyses of Bernelot Moens show a percentage of from 4½ to 10·6 of quinine in the latter variety. Some of them, however, in December 1878, afforded not more than 0·64 per cent. of quinine and 1·26 of cinchonidine.

The regular shipments of the barks from Java to the Amsterdam market are going on, and the barks are sold there with regard to the results of the government chemist’s analyses.

Cinchona Bark from the Indian plantations began to be brought into the London market in 1867, and now arrives in constantly increasing quantities.

The history of the transplantation of the Cinchona down to the year 1867 has been made the subject of the report of Soubeiran and Delondre mentioned at the end of the present article.

Description—(A.) Of Cinchona Barks generally—In the development of their bark, the various species of Cinchona exhibit considerable diversity. Many are distinguished from an early stage by an abundant exfoliation of the outer surface, while in others this takes place to a smaller degree, or only as the bark becomes old. The external appearance of the bark varies therefore very much, by reason of the greater or less development of the suberous coat. The barks of young stems and branches have a greyish tint more or less intense, while the outer bark of old wood displays the more characteristic shades of brown or red, especially after removal of the corky layers.

In the living bark, these colours are very pale, and only acquire their final hue by exposure to the air, and drying. Some of them however are characteristic of individual species, or at least of certain groups, so that the distinctions originated by the bark-collectors of pale, yellow, red, etc. and adopted by druggists, are not without reason.

In texture, the barks vary in an important manner by reason of diversity in anatomical structure. Their fracture especially depends upon the number, size, and arrangement of the liber-fibres, as will be shown in our description of their microscopic characters.

The taste in all species is bitter and disagreeable, and in some there is in addition a decided astringency. Most species have no marked odour, at least in the dried state. But this is not the case in that of C. officinalis, the smell of which is characteristic.

(B.) Of the Barks used in pharmacy—For pharmaceutical preparations as distinguished from the pure alkaloids and their salts, the Cinchona barks employed are chiefly of three kinds.

1. Pale Cinchona Bark, Loxa Bark, Crown Bark—This bark, which previous to the use of Quinine and for long afterwards, was the ordinary Peruvian Bark of English medicine, is only found in the form of quills, which are occasionally as much as a foot in length, but are more often only a few inches or are reduced to still smaller fragments. The quills are from ¾ down to an ⅛ of an inch in diameter, often double, and variously twisted and shrunken. The thinnest bark is scarcely stouter than writing paper; the thickest may be ⅒ of an inch or more. The pieces have a blackish brown or dark greyish external surface, variously blotched with silver-grey, and often beset with large and beautiful lichens. The surface of some of the quills is longitudinally wrinkled and moderately smooth; but in the majority it is distinctly marked by transverse cracks, and is rough and harsh to the touch. The inner side is closely striated and of a bright yellowish-brown.

The bark breaks easily with a fracture which exhibits very short fibres on the inner side. It has a well-marked odour sui generis, and an astringent bitter taste. Though chiefly afforded by C. officinalis, some other species occasionally contribute to furnish the Loxa Bark of commerce as shown in the conspectus at p. 355.

2. Calisaya Bark, Yellow Cinchona Bark.—This bark, which is the most important of those commonly used in medicine, is found in flat pieces (α.), and in quills (β.), both afforded by C. Calisaya Wedd., though usually imported separated.

α. Flat Calisaya—is in irregular flat pieces, a foot or more in length by 3 to 4 inches wide, but usually smaller, and ²/₁₀ to ⁴/₁₀ of an inch in thickness; devoid of suberous layers and consisting almost solely of liber, of uniform texture, compact and ponderous. Its colour is a rusty orange-brown, with darker stains on the outer surface. The latter is roughened with shallow longitudinal depressions, sometimes called digital furrows. The inner side has a wavy, close, fibrous texture. The bark breaks transversely with a fibrous fracture; the fibres of the broken ends are very short, easily detached, and with a lens are seen to be many of them faintly yellowish and translucent.

A well-marked variety, known as Bolivian Calisaya, is distinguished for its greater thinness, closer texture, and for containing numerous laticiferous ducts which are wanting in common flat Calisaya bark.

β. Quill Calisaya—is found in tubes ¾ to 1½ inch thick, often rolled up at both edges, thus forming double quills. They are always coated with a thick, rugged, corky layer, marked with deep longitudinal and transverse cracks, the edges of which are somewhat elevated. This suberous coat, which is silvery white or greyish, is easily detached, leaving its impression on the cinnamon-brown middle layer. The inner side is dark brown and finely fibrous. The transverse fracture is fibrous but very short. The same bark also occurs in quills of very small size, and is then not distinguishable with certainty from Loxa bark.

3. Red Cinchona Bark.—Though still retaining a place in the British Pharmacopœia, this is by far the least important of the Cinchona barks employed in pharmacy. But as the tree yielding it (C. succirubra) is now being cultivated on a large scale in India, the bark may probably come more freely into use.

Red Bark of large stems, which is the most esteemed kind, occurs in the form of flat or channelled pieces, sometimes as much as ½ an inch in thickness, coated with their suberous envelope which is rugged and warty. Its outermost layer in the young bark has a silvery appearance. The inner surface is close and fibrous and of a brick-red hue. The bark breaks with a short fibrous fracture.

(C.) Of the Barks not used in pharmacy—Among the non-officinal barks, the most important are afforded by Cinchona lancifolia Mutis and C. pitayensis Wedd., natives of the Cordilleras of Columbia.

These barks are largely imported and used for making quinine, the former under the name of Columbian, Carthagena, or Caqueta bark. It varies much in appearance, but is generally of an orange-brown; the corky coat, which scales off easily, is shining and whitish. The barks of C. lancifolia often occur in fine large quills or thick flattish pieces. Their anatomical structure agrees in all varieties which we have examined, in the remarkable number of thick-walled and tangentially-extended cells of the middle cortical layer and the medullary rays. In percentage of alkaloids, Carthagena barks are liable to great variation.

The Pitayo Barks are restricted to the south-western districts of Columbia, and are usually imported in short flattish fragments, or broken quills, of brownish rather than orange colour, mostly covered with a dull greyish or internally reddish cork. The middle cortical layer exhibits but few thick-walled cells; the liber is traversed by very wide medullary rays, and is provided with but a small number of widely scattered liber-fibres, which are rather thinner than in most other Cinchona barks. The Pitayo barks are usually rich in alkaloids, quinine prevailing. Cinchona pitayensis is one of the hardiest species of the valuable Cinchonas, and is therefore particularly suitable for cultivation, which however has not yet been carried out as largely as that of either C. officinalis or C. succirubra.

In the Conspectus on the next page, we have arranged the principal species of Cinchona, with short indications of the barks which some of them afford.

Microscopic Structure—The first examination of the minute structure of Cinchona barks is due to Weddell, whose observations have been recorded in one of his beautiful plates published in 1849. Since that time numerous other observers have laboured in the same field of research.

General Characters.—These barks, as contrasted with those of other trees, do not exhibit any great peculiarities of structure; and their features may be comprehended in the following statements. The epidermis, in the anatomical sense, occurs only in the youngest barks, which are not found in commerce. The corky layer, which replaces the epidermis, is constructed of the usual tabular cells. In some species as C. Calisaya, it separates easily, at least in the older bark, whereas in others as C. succirubra, the bark even of trunks is always coated with it. In several species the corky tissue is not only found on the surface, but strips of it occur also in the inner substance of the bark. In this case the portions of tissue external to the inner corky layers or bands are thrown off as bork-scales (periderm of Weddell). This peculiar form of suberous tissue was first examined (not in cinchona) in 1845 by H. von Mohl, who called it rhytidoma (Borke of the Germans). In C. Calisaya it is of constant occurrence, but not so usually in C. succirubra and some others; the rhytidoma therefore affords a good means of distinguishing several barks.

The inner portion of the bark exhibits a middle or primary layer (mesophlœum), made up of parenchyme; and a second inner layer or liber (endophlœum) displaying a much more complicated structure. The primary layer disappears if rhytidoma is formed: barks in which this is the case are therefore at last exclusively composed of liber, of which Flat Calisaya Bark is a good example.

CONSPECTUS OF THE PRINCIPAL
SPECIES OF CINCHONA.

SPECIES (EXCLUDING
SUB-SPECIES AND VARIETIES)
ACCORDING TO WEDDELL. WHERE
FIGURED. NATIVE
COUNTRY. WHERE
CULTIVATED. PRODUCT.

I. Stirps Cinchonæ officinalis

1. Cinchona officinalis Hook Bot. Mag. 5804 Ecuador (Loxa) India, Ceylon, Java. Loxa or Crown Bark, Pale Bark.

2. ” macrocalyx Pav. Howard N. Q. Peru Ashy Crown Bark. The sub-species
_C. Palton_ affords an important
sort called _Palton Bark_ much
used in the manufacture of quinine.

3. ” lucumæfolia Pav. Do. Ecuador, Peru.

4. ” lanceolata R. et P.(?) Do. Peru Carthagena Bark, confounded with
Palton Bark, but is not so good.

5. ” lancifolia Mutis Karsten tab. 11. 12. New Granada India Columbian Bark. Imported in large
quantities for manufacture of
quinine.The soft Columbian Bark
is produced by Howard’s var.
_oblonga_.

6. ” amygdalifolia Wedd. Wedd. tab. 6. Peru, Bolivia A poor bark, but not now imported.

II. Stirps Cinchonæ rugosæ

7. Cinchona pitayensis Wedd. Karst. tab. 22.
(C. Trianæ). New Granada
(Popayan) India Pitayo Bark. Very valuable; used by
makers of quinine; it is the chief
source of quinidine.

8. ” rugosa Pav. Howard N. Q. Peru Bark unknown, probably valueless.

9. ” Mutisii Lamb. Do. Ecuador Bark not in commerce, contains only
aricine.

10. ” hirsuta R. et P. Wedd. tab. 21. Peru

11. ” carabayensis Wedd. Wedd. tab. 19. Peru, Bolivia Bark not collected.

12. ” Pahudiana How. Howard N. Q. Peru India, Java A poor bark, yet of handsome
appearance; propagation of tree
discontinued.

13. ” asperifolia Wedd. Wedd. tab. 20. Bolivia Bark not collected.

14. ” umbellulifera Pav. Howard N. Q. Peru Bark not known as a distinct sort.

15. ” glandulifera R. et P. Do. Peru Do.

16. ” Humboldtiana Lamb. Do. Peru False Loxa Bark, Jaen Bark.
A very bad bark.

III. Stirps Cinchonæ micranthæ

17. Cinchona australis Wedd. Wedd. tab. 8. South Bolivia An inferior bark, mixed with
Calisaya.

18. ” scrobiculata H. et B. Do. Peru Bark formerly known as Red
Cusco Bark or Santa Ana Bark.

19. ” peruviana How. Howard N. Q. Peru

20. ” nitida R. et P. Do. Peru India Grey Bark, Huanuco or Lima Bark.
Chiefly consumed on the Continent.

21. ” micrantha R. et P. Do. Peru India

IV. Stirps Cinchonæ Calisayæ

22. Cinchona Calisaya Wedd. Wedd. tab. 9. Peru, Bolivia India, Ceylon, Java,
Jamaica, Mexico. Calisaya Bark, Bolivian Bark,
Yellow Bark. The tree exists under
many varieties, bark also very
variable.

23. ” elliptica Wedd. Do. Peru (Carabaya) Carabaya Bark. Bark scarcely now
imported. C. sunsura Miq.
(flower and fruit unknown)
may perhaps be this species.

V. Stirps Cinchonæ ovatæ

24. Cinchona purpurea R. et P. Howard N. Q. Peru (Huamalica) Huamalies Bark. Not now Imported.

25. ” rufinervis Wedd. Do. Peru, Bolivia Bark, a kind of light Calisaya.

26. ” succirubra Pav. Do. Ecuador India, Ceylon,
Java, Jamaica. Red Bark. Largely cultivated in
British India.

27. ” ovata R. et P. Do. Peru, Bolivia India(?), Java(?) Inferior Brown and Grey Barks.

28. ” cordifolia Mutis Karsten tab. 8. New Granada, Peru Columbian Bark (in part). Tree
exists under many varieties; bark
of some used in manufacture of
quinine.

29. ” tucujensis Karst. Karsten tab. 9. Venezuela Maracaibo Bark.

30. ” pubescens Vahl Wedd. tab. 16. Ecuador, Peru,
Bolivia Arica Bark (Cusco Bark from var.
Pelletieriana). Some of the
varieties contain aricine.
C. caloptera Miq. is probably
a var. of this species.

31. ” purpurascens Wedd. Wedd. tab. 18 Bolivia Bark unknown in commerce.

The liber is traversed by medullary rays, which in cinchona are mostly very obvious, and project more or less distinctly into the middle cortical tissue. The liber is separated by the medullary rays into wedges, which are constituted of a parenchymatous part and of yellow or orange fibres. The number, colour, shape, and size, but chiefly the arrangement of these fibres, confer a certain character common to all the barks of the group under consideration.

The liber-fibres are elongated and bluntly pointed at their ends, but never branched, mostly spindle-shaped, straight or slightly curved, and not exceeding in length 3 millimetres. They are consequently of a simpler structure than the analogous cells of most other officinal barks. They are about ¼ to ⅓ mm. thick, their transverse section exhibiting a quadrangular rather than a circular outline. Their walls are strongly thickened by numerous secondary deposits, the cavity being reduced to a narrow cleft, a structure which explains the brittleness of the fibres. The liber-fibres are either irregularly scattered in the liber-rays, or they form radial lines transversely intersected by narrow strips of parenchyme, or they are densely packed in short bundles. It is a peculiarity of cinchona barks that these bundles consist always of a few fibres (3 to 5 or 7), whereas in many other barks (as cinnamon) analogous bundles are made up of a large number of fibres. Barks provided with long bundles of the latter kind acquire therefrom a very fibrous fracture, whilst cinchona barks from their short and simple fibres exhibit a short fracture. It is rather granular in Calisaya bark, in which the fibres are almost isolated by parenchymatous tissue. In the bark of C. scrobiculata, a somewhat short fibrous fracture is due to the arrangement of the fibres in radial rows. In C. pubescens, the fibres are in short bundles and produce a rather woody fracture.

Besides the liber-fibres, there are some other cells contributing to the peculiarity of individual cinchona barks. This applies chiefly to the laticiferous ducts or vessels which are found in many sorts; they are scattered through the tissue intervening between the middle cortical layer and the liber, and consist of soft, elongated, unbranched cells, mostly exceeding in diameter the neighbouring parenchymatous cells.

As to the contents of the tissue of cinchona barks, crystallized alkaloids are not visible. Howard has published figures representing minute rounded aggregations of crystalline matter in the cells, which he supposes to be kinovates of the alkaloids; and also distinct acicular crystals which he holds to be of the same nature. These remarkable appearances are easily observable, yet only after sections of the bark have been boiled for a minute in weak caustic alkali and then washed with water; it may well be doubted whether they are strictly natural. The liquids which are capable of dissolving the alkaloids in the free state do not afford any if they are applied to the barks. The alkaloids being contained in the bark in the form of salts, the latter are decomposed by caustic lye, and the alkaloids set at liberty assume the crystallized state. This is in our opinion the origin of the crystals under notice.

The greater number of the parenchymatous cells are loaded with small starch granules, or in young and fresh barks with chlorophyll. In several barks, as in that of C. lancifolia Mutis, numerous cells of the middle cortical layer and even of the medullary rays, are provided with somewhat thick walls, and contain either a soft brown mass or crystalline oxalate of calcium. These cells have therefore been called resin-cells and crystal-cells; they are mostly isolated, not forming extensive groups or zones, and their walls are not strongly thickened as in true sclerenchymatous tissue. If thin sections of the barks are moistened with dilute alcoholic perchloride of iron, the walls of the cells, except the fibres and the cork, assume a blackish-green due to cincho-tannic acid; this applies even to the starch granules.

Characters of particular sorts.—The modifications of general structure just described, are sufficient to impart a special character to the bark of many species of Cinchona, provided the bark is examined at its full development, the structural peculiarities being far from well-marked in young barks.

Thus it is not possible to point out any distinctive features for the Loxa Bark of commerce, because it is mostly taken from young wood. We may say of it, that neither resin-cells nor crystal-cells occur in its middle layer, that its laticiferous vessels become soon obliterated, and have indeed disappeared in the older quills; and that the liber-fibres form interrupted, not very regular, radial rows.

The quills of C. Calisaya display large laticiferous ducts, which are wanting in the flat bark. There is a peculiar sort of the latter called Bolivian Calisaya (already mentioned at p. 353), the flat pieces of which still possess very obvious laticiferous vessels. As to the liber-fibres of Calisaya bark, they are, as before stated (p. 356), scattered throughout the parenchymatous tissue or endophlœum. In the bark of C. scrobiculata, which might at first sight be confounded with Calisaya bark, the liber-fibres form radial, less interrupted rows. The microscope affords therefore the means of distinguishing these two barks.

The barks of C. succirubra are particularly rich in laticiferous ducts, mostly of considerable diameter, in which the formation of new parenchyme may not unfrequently be observed. The orange liber-fibres occurring in this bark are less numerous, more scattered, and of smaller size than in Calisaya. The fracture of Red Bark, especially the flat sort, is therefore more finely granular and not so coarse as that of Calisaya.

The structural characters of Cinchona barks may lastly be fully appreciated by examining barks of the allied genera Buena, Cascarilla and Ladenbergia, which were formerly known under the name of False Cinchona Barks. The microscope shows that the liber-fibres of the latter are soft, branched and long, densely packed into large bundles, imparting therefore a well-marked fibrous structure. The external appearance of these barks is widely different from that of true cinchona barks; none of them it would appear is now collected for the purpose of adulteration.

Chemical Composition—The most important and at the same time peculiar principles of Cinchona bark are the Alkaloids,—enumerated in the following table:—

Cinchonine C₂₀H₂₄N₂O.

or, as proposed by Skraup (1878) C₁₉H₂₂N₂O.

Cinchonidine (Quinidine of many writers) same formula.

Quinine C₂₀H₂₄N₂O₂.

Quinidine (Conquinine of Hesse) same formula.

Quinamine C₁₉H₂₄N₂O₂.

Conquinamine (Conchinamine) same formula.

B. A. Gomes of Lisbon (1810) first succeeded in obtaining active principles of cinchona, by treating an alcoholic extract of the bark with water, adding to the solution caustic potash, and crystallizing the precipitate from alcohol. The basic properties of the substance thus obtained, which Gomes called Cinchonino, were observed in the laboratory of Thénard by Houtou-Labillardière, and communicated to Pelletier and Caventou. Shortly before that time, Sertürner had asserted the existence of organic alkalis: and the French chemists, guided by that brilliant discovery, were enabled to show that the Cinchonino of Gomes belonged to the same class of substances. Pelletier and Caventou, however, speedily pointed out that it consisted of two distinct alkaloids, one of which they named Quinine, the other Cinchonine. In 1827 the Institut de France awarded to the two chemists for their discovery the Montyon prize of 10,000 francs (see page 57, note 4).

Cinchonidine (thus called by Pasteur in 1853) was first obtained and characterized under the name of Quinidine in 1847, by F. L. Winckler of Darmstadt, from Maracaibo Bark (C. tucujensis Karst.); and in 1852 it was more closely studied by Leers, still under the name of quinidine.

Cinchovatine, formerly stated to be a peculiar alkaloid, has been shown by Hesse in 1876 to agree with cinchonidine.

Quinidine is the name applied by Henry and Delondre to an alkaloid they obtained in 1833; its peculiar nature was not clearly proved until 1853, when Pasteur examined it, and 1857 when De Vry showed its identity with the Beta-quinine extracted in 1849 by Van Heijningnen from commercial quinoidin. The name quinidine having been since applied to different basic substances more or less pure, Hesse (1865) has proposed to replace it by that of Conquinine (Conchinin in German). The alkaloid is especially characteristic of the Pitayo barks, and also occurs in the Calisaya barks from Java.

Quinamine was discovered in 1872 by Hesse, in bark of C. succirubra cultivated at Darjiling in British Sikkim; it is also of common occurrence in the barks collected in Java. Conquinamine was extracted in 1873 by Hesse from old barks from British India.

Paricine is another basic substance discovered in 1845 by Winckler, in the bark of Buena hexandra Pohl. Hesse detected it along with quinamine in the bark of C. succirubra; its composition is not yet known.

Aricine, C₂₃H₂₆N₂O₄, and Cusconine, C₂₃H₂₆N₂O₄ + 2 OH₂, occur in the so-called false Cinchona barks of not ascertained botanic origin. These alkaloids differ in many respects from those of true Cinchona barks.

Pitoyine was pointed out by Peretti (1837), but Hesse has shown (1873) that the bark called China bicolorata Tecamez or Pitoya Bark from which it was obtained, is altogether destitute of alkaloid.

Lastly may be mentioned Paytine, C₂₁H₂₄N₂O + OH₂, a crystallizable alkaloid discovered in 1870 by Hesse in a white bark of uncertain origin. It is allied to quinamine and quinidine, but has not been met with in any known cinchona bark.

By heating for a length of time solutions of the cinchona alkaloids with an excess of some mineral acid, Pasteur (1753) obtained amorphous modifications of the natural bases. Quinine thus afforded Quinicine, having the same composition; cinchonine and cinchonidine furnished Cinchonicine, likewise agreeing in composition with the alkaloids from which it originates. These amorphous products may also be obtained by heating the natural bases in glycerin at 200° C., when a red substance is also formed. In quinine manufactories, amorphous alkaloids are constantly met with, being partly produced in the course of the manipulations to which the materials are subjected. Yet cinchona barks also afford amorphous alkaloids at the very outset of analysis, whence we must infer their existence in the living plant.

The name Quinoidine (or rather “Chinioïdin”) was applied by Sertürner (1829) to an uncrystallizable basic substance, which he prepared from cinchona barks, and found to be a peculiar alkaloid. The term has subsequently been bestowed upon a preparation which has found its way into commerce and medical practice, in the form of a dark brown brittle extractiform mass, softening below 100° C., and having usually a slight alkaline reaction. It is obtained in quinine factories by precipitating the brown mother-liquors with ammonia, and contains the amorphous alkaloids naturally occurring in the barks. Quinoidin should not be used unless, when previously dried at 100°, it proves to afford at least 70 per cent. of alkaloids soluble in ether.

Quinine and the allied alkaloids have not been met with in any appreciable amount in other parts of the cinchonas than the bark, nor has their presence been ascertained in other plants than those of the tribe Cinchoneæ.

Characters of the Cinchona Alkaloids.

1. Quinine.—It is obtained from alcoholic solutions, in prisms of the composition C₂₀H₂₄N₂O₂ + 3 OH₂, fusing at 57° C. The crystals may be deprived of water by warming or exposure over oil of vitriol, and they fuse at 177° C. The anhydrous alkaloid is likewise crystallizable; it requires about 21 parts of ether for solution, but dissolves more readily in chloroform or absolute alcohol. These solutions deviate the ray of polarized light to the left, and so do likewise solutions of the salts of quinine. Yet one and the same quantity of alkaloid exhibits a very different rotatory power according to the solvent used, though the volume of the solution remain the same. Even the common sulphate differs in this respect from the two other sulphates of quinine. The same remark applies to the optical power of the other alkaloids.

If ten volumes of a solution of quinine, or of one of its salts, are mixed in a test tube with one volume of chlorine water, and a drop of ammonia is added, a brilliant green colour makes its appearance. In solutions rich in quinine, a green precipitate, Thalleioquin or Dalleiochine is produced; in solutions containing less than ¹/₁₀₀₀ of quinine, no precipitate is formed, but the fluid assumes a green even more beautiful than in a stronger solution. The test succeeds with a solution containing only one part of quinine in 5,000, and in a solution containing not more than ¹/₂₀₀₀ of quinine, if bromine is used instead of chlorine.

The bitter taste of quinine is not appreciable in solutions containing less than one part in 100,000. The blue fluorescence displayed by a solution of quinine in dilute sulphuric acid is observable in solutions containing much less than one part in 200,000 of water; yet it is not apparent in very strong solutions.

Besides the common medicinal sulphate, 2 C₂₀H₂₄N₂O₂ + SO₄H₂ + 8 OH₂, quinine forms two other crystallizable sulphates, namely the sulphate, C₂₀H₂₄N₂O₂ + SO₄H₂ + 7 OH₂, and a third having the composition C₂₀H₂₄N₂O₂ + 2 SO₄H₂ + 7 OH₂.

Herapath, at Bristol, showed in 1852 that quinine forms with sulphuric acid and iodine a peculiar compound, Iodo-sulphate of Quinine, having the composition (C₂₀H₂₄N₂O₂)₄ + 3 (SO₄H₂) + 2 HI + 4 I + 3 OH₂. As this substance possesses optical properties analogous to those of tourmaline, it was called by Haidinger, Herapathite. It may be easily obtained by dissolving sulphate of quinine in 10 parts of weak spirit of wine containing 5 per cent. of sulphuric acid, and adding an alcoholic solution of iodine until a black precipitate is no longer formed. This precipitate is collected on a filter and washed with alcohol; then dissolved in boiling spirit of wine and allowed to crystallize. The tabular crystals thus obtained are extremely remarkable on account of their dichroism and polarizing power, as well as for the sparing solubility, since they require 1000 parts of boiling water for solution; their sparing solubility in cold alcohol may be utilized for separating quinine from the other cinchona alkaloids and estimating its quantity.

2. Quinidine or Conquinine—forms crystals having the composition, C₂₀H₂₄N₂O₂ + 2 OH₂; the anhydrous alkaloid melts at 168° C., and requires about 30 parts of ether for solution. Its solutions are strongly dextrogyre; it agrees with quinine as regards bitterness, fluorescence and the thalleioquin test, and forms a neutral and an acid sulphate. The most striking character of quinidine is afforded by its hydriodate, the crystals of which require for solution at 15° C., 1250 parts of water or 110 parts of alcohol sp. gr. ·834. Quinidine may therefore be separated from the other alkaloids of bark by a solution of iodide of potassium which will precipitate the hydriodate. According to Hesse (1873), quinidine is further characterized by the fact that its sulphate is soluble in 20 parts of chloroform at 15° C., the sulphates of the other cinchona alkaloids being far less soluble in that liquid. The common medicinal sulphate of quinine, e.g., requires for solution 1000 parts of chloroform.

3. Cinchonine.—This alkaloid forms crystals which are always anhydrous; they fuse at 257° C., and require about 400 parts of ether and 120 of spirit of wine for solution. Cinchonine further differs from quinine by its dextrogyre power, its want of fluorescence, and its non-susceptibility to the thalleioquin test. Its hydriodate is readily soluble in water, and still more so in alcohol whether dilute or strong.

4. Cinchonidine.—forms anhydrous crystals melting at 206° C., soluble in 76 parts of ether, or 20 of spirit of wine, then affording levogyre liquids, devoid of fluorescence, and not acquiring a green colour (thalleioquin) by means of chlorine water and ammonia. Hydrochlorate of cinchonidine forms pyramidal crystals of the monoclinic system, very different from the hydrochlorates of the allied alkaloids.

5. Quinamine.—The crystals are anhydrous, fuse at 172° C., and form at a temp. of 20°, with 32 parts of ether or 100 parts of spirit of wine, a dextrogyre solution. Quinamine is even to some extent soluble in boiling water, and abundantly in boiling ether, benzol, or petroleum ether. The solutions of quinamine do not stand the thalleioquin test, nor do they display fluorescence; in acid solution, the alkaloid is liable to be transformed into an amorphous state. Quinamine moistened with concentrated nitric acid, assumes like paytine a yellow coloration. Its hydriodate is readily soluble in boiling water, but very sparingly in cold water, especially in presence of iodide of potassium, in which respect it is allied to quinidine as well as to paytine.

The more important properties of the Cinchona alkaloids may be summarized as follows:—

a. Hydrated crystals are formed by Quinine, Quinidine, (or Conquinine).

No hydrated crystals by Cinchonine, Cinchonidine, Quinamine.

b. Abundantly_ soluble in ether Quinine, Quinidine, Quinamine,
and the amorphous alkaloids.

Sparingly soluble in ether Cinchonidine.

Almost insoluble in ether

c. Levogyre solutions afforded by Quinine, Cinchonidine.

Dextrogyre solutions by Cinchonine, Quinidine, Quinamine,
Conquinamine, and the amorphous alkaloids.

d. Thalleioquin is formed by Quinine, Quinidine, and also by Quinicine.

Thalleioquin cannot be obtained from Cinchonine, Cinchonidine, Quinamine,
nor from Cinchonicine.

e. Fluorescence is displayed by solutions of Quinine, Quinidine.

No fluorescence in solutions of pure Cinchonine, Cinchonidine, Quinamine.

Proportion of Alkaloids in Cinchona Barks—This is liable to very great variation. We know from the experiments of Hesse (1871), that the bark of C. pubescens Vahl is sometimes devoid of alkaloid. Similar observations made near Bogota upon C. pitayensis Wedd., C. corymbosa Karst., and C. lancifolia Mutis, are due to Karsten. He ascertained that barks of one district were sometimes devoid of quinine, while those of the same species from a neighbouring locality yielded 3½ to 4½ per cent. of sulphate of quinine.

Another striking example is furnished by De Vry in his examination of quills of C. officinalis grown at Ootacamund, which he found to vary in percentage of alkaloids, from 11·96 (of which 9·1 per cent. was quinine) down to less than 1 per cent. An extremely remarkable variation has also been displayed, as already alluded to at p. 351, by Ledger’s Calisaya.

Among the innumerable published analyses of cinchona bark, there are a great number showing but a very small percentage of the useful principles, of which quinine, the most valuable of all, is not seldom altogether wanting. The highest yield on the other hand hitherto observed, was obtained by Broughton from a bark grown at Ootacamund. This bark afforded not less than 13½ per cent. of alkaloids, among which quinine was predominant. In Java too, Cinchona Ledgeriana (see pp. , ) has proved since to afford much more alkaloid than any American barks; as much as 13·25 per cent. of quinine have been observed in its bark.

The few facts just mentioned show that it is impossible to state even approximately any constant percentage of alkaloids in any given bark. We may however say that good Flat Calisaya Bark, as offered in the drug trade for pharmaceutical preparations, contains at least 5 to 6 per cent. of quinine.

As to Crown or Loxa Bark, the Cortex Cinchonæ pallidæ of pharmacy, its merits are, to say the least, very uncertain. On its first introduction in the 17th century, when it was taken from the trunks and large branches of full-grown trees, it was doubtless an excellent medicinal bark; but the same cannot be said of much of that now found in commerce, which is to a large extent collected from very young wood. Some of the Crown Bark produced in India is however of extraordinary excellence, as shown by the recent experiments of De Vry.

As to Red Bark, the thick flat sort contains only 3 to 4 per cent. of alkaloids, but a large amount of coloring matter. The quill Red Bark of the Indian plantations is a much better drug, some of it yielding 5 to 10 per cent. of alkaloids, less than a third of which is quinine and a fourth cinchonidine, the remainder being cinchonine and sometimes also traces of quinidine (conquinine).

The variations in the amount of alkaloids relates not merely to their total percentage, but also to the proportion which one bears to another. Quinine and cinchonine are of the most frequent occurrence; cinchonidine is less usual, while quinidine is still less frequently met with and never in large amount. The experiments performed in India have already shown that external influences contribute in an important manner to the formation of this or that alkaloid; and it may even be hoped that the cultivators of cinchona will discover methods of promoting the formation of quinine and of reducing, if not of excluding, that of the less valuable alkaloids.

Most salts of the alkaloids of cinchona afford a beautiful purple tar when they are heated in a test tube, and the same is also produced with the powdered bark, provided alkaloids be present. No other bark, as far as we know, yields a similar product of the dry distillation. It is not observed even in using true Cinchona barks, which are devoid of alkaloids. This method for ascertaining the presence of alkaloids in Cinchona barks has been proposed in 1858 by Grahe of Kasan. Hesse has improved Grahe’s test in the following way: he extracts the powdered bark with slightly acidulated water and dries up the liquid with a little of the powder. Grahe’s test at once shows whether a given bark contains Cinchona alkaloids or not.

Acid principles of Cinchona Barks—Count Claude de la Garaye observed (1746) a crystalline salt deposited in extract of cinchona bark, which salt was known for some time in France as Sel essential de la Garaye. Hermbstädt at Berlin (1785) showed it to be a salt of calcium, the peculiarity of whose acid was pointed out in 1790 by C. A. Hoffmann, an apothecary of Leer in Hanover, who termed it Chinasäure. The composition of this substance, which is the Kinic Acid of English chemists, was ascertained by Liebig in 1830 to be C₇H₁₂O₆, or now C₆H₇(OH)₄COOH. The acid forms large monoclinic prisms, fusible at 162° C., of a strong and pure acid taste, soluble in two parts of water, also in spirit of wine, but hardly in ether. The solutions are levogyre. Kinic acid appears to be present in every species, and also to occur in barks of allied genera; and in fact to be of somewhat wide distribution in the vegetable kingdom. By heating it or a kinate, interesting derivatives are obtained; thus, by means of peroxide of manganese and sulphuric acid, we get yellow crystals of Kinone or Quinone, C₆H₄O₂,—a reaction which may be used for ascertaining the presence of kinic acid. Kinic acid is devoid of any noteworthy physiological action.

Cincho-tannic Acid—is precipitated from a decoction of bark by acetate of lead, after the decoction has been freed from cinchona-red by means of magnesia. Dr. de Vry informed us that the Indian barks are usually richer in cincho-tannic acid; their cold infusion becomes turbid on addition of hydrochloric acid, which forms an insoluble compound with the former.

The cincho-tannate of lead decomposed by sulphuretted hydrogen, and the solution cautiously evaporated in vacuo, yields the acid as an amorphous, hygroscopic substance, readily soluble in water, alcohol, or ether. The solutions, especially in presence of an alkali, are quickly decomposed, a red flocculent matter, Cinchona-red, being produced. Solutions of cincho-tannic acid assume a greenish colour on addition of a ferric salt. By destructive distillation, cincho-tannic acid affords pyrocatechin.

Quinovic (or Chinovic) Acid, C₂₄H₃₈O₄, crystallizes in hexagonal scales which are sparingly soluble in cold alcohol, more readily in boiling alcohol, but not dissolved by water, ether, or chloroform. It occurs in cinchona barks, and has been met with by Rembold (1868) in the rhizome of Potentilla Tormentilla Sibth.

Other Constituents of Cinchona Barks—Quinovic acid is accompanied by Quinovin (or Chinovin), C₃₀H₄₈O₈, an amorphous bitter substance, first obtained (1821) by Pelletier and Caventou under the name of Kinovic Acid, from China nova, in which it occurs combined with lime. Quinovin in alcoholic solution was shown in 1859 by Hlasiwetz to be resolved by means of hydrochloric gas into quinovic acid, C₂₄H₃₈O₄, and an uncrystallizable sugar, Mannitan, C₆H₁₂O₅, with subtraction of H₂O. The formation of quinovic acid takes place more easily, if quinovin is placed in contact with sodium amalgam and spirit of wine, when, after 12 hours, mannitan and quinovate of sodium are formed (Rochleder, 1867).

Quinovin, although an indifferent substance, may be removed from cinchona barks by weak caustic soda, from which it is precipitable by hydrochloric acid, together with quinovic acid and cinchona-red. Milk of lime then dissolves quinovin and quinovic acid, but not the red substance. Quinovic acid and quinovin again precipitated by an acid, may be separated by chloroform in which the latter only is soluble, or also by cold dilute alcohol sp. gr. about 0·926, quinovin being readily removed by this liquid.

Quinovin dissolves in boiling water; its solutions, as well as those of quinovic acid, are dextrogyre. Quinovin seems to be a constituent of almost every part of the cinchonas and the allied Cinchoneæ, although the amount of it in barks does not apparently exceed 2 per cent. It is accompanied by quinovic acid: both substances are stated to have tonic properties.

Cinchona-red, an amorphous substance to which the red hue of cinchona barks is due, is produced as shown by Rembold (1867), when cincho-tannic acid is boiled with dilute sulphuric acid, sugar being formed at the same time. By fusing cinchona-red with potash, protocatechuic acid, C₇H₆O₄, is produced. Cinchona-red is sparingly soluble in alcohol, abundantly in alkaline solutions, but neither in water nor in ether. Thick Red Bark in which it is abundant, affords it to the extent of over 10 per cent.

The Cinchona barks yield but a scanty percentage of ash, not exceeding 3 per cent., a fact well according with the small amount they contain of oxalate and kinate of calcium.

Estimation of the Alkaloids in Cinchona Bark—The microscope will enable us, as already shown, to ascertain whether a given bark is derived from Cinchona, but it can furnish no exact information as to the actual value of such bark as a drug.

Yet there is a very simple test by which the presence of a cinchona-alkaloid may be demonstrated. These alkaloids heated in a glass tube in the presence of a volatile acid or of substances capable of producing a volatile acid, evolve heavy vapours of a beautiful crimson colour, as mentioned p. 363.

But to ascertain the real value of a cinchona bark, a quantitative estimation of the alkaloids is necessary. A good process for this operation has been given by De Vry. It is as follows:—Mix 20 grammes of powdered bark, dried at 100° C., with milk of lime (5 grm. slaked lime to 50 grm. water), dry the mixture slowly; by stirring it frequently, the cincho-tannic acid loses its solubility, being gradually transformed into cinchona-red. Then boil the dry powder with 200 cubic centimetres of alcohol 0·830 sp. gr. Pour the liquid on to a small filter, and afterwards the residual bark and lime mixed with 100 cub. cent. more alcohol. Wash the powder on the filter with 100 cub. cent. of spirit From the mixed liquids, about 370 cub. cent., separate the calcium by a few drops of weak sulphuric acid. Filter, distill off the spirit and pour into a capsule the residual liquid,—to which add a small quantity of spirit and water with which the distilling apparatus has been rinsed out. Let the capsule be now heated on a water-bath until all the spirit shall have been expelled; and let the remaining liquor which contains all the alkaloids in the form of acid sulphates be filtered. There will remain on the filter quinovic acid and fatty substances, which must be washed with slightly acidulated water. The filtrate and washings reduced to about 50 cub. cent., should be treated while still warm with caustic soda in excess. After cooling, this is decanted off from the precipitate, and then water added to it before throwing it on to a filter. It is then to be washed with the smallest quantity of water pressed between folds of blotting paper, removed therefrom and dried. The weight multiplied by 5 will indicate the percentage of mixed alkaloids in the bark.

To separate the alkaloids from each other, treat the powdered mass with ten times its weight of ether. This will resolve it into two portions—(a) insoluble in ether, (b) soluble in ether.

(a.) This should be converted into neutral acetates, and to the solution there should be added iodide of potassium, which will possibly separate a little quinidine. After removal of the latter (if present), add solution of tartrate of potassium and sodium, which will throw down in a crystalline form tartrate of cinchonidine; from the mother-liquor, cinchonine may be precipitated by caustic soda.

(b.) The ether having been evaporated, the residue is to be dried at 100° C. and weighed. It may in many cases practically be considered as consisting of quinine only. If however the estimation of quinidine (conquinine) and quinamine is required, the residue, or a determined portion of it, should be dissolved in acetic acid just as much as will be necessary for affording a neutral solution. From this the hydroiodate of quinidine is precipitated by means of an alcoholic solution of iodide of potassium. In the filtrate quinine may be precipitated by adding a few drops of dilute sulphuric acid and an alcoholic tincture of iodine. The herapathite thus formed (see p. 360) is collected after a day, dried at 100° and weighed; it then contains 55 per cent. of quinine.

After adding a few drops of sulphurous acid, the alcohol should now be evaporated from the fluid from which the crystals of herapathite have been removed, and caustic lye added, by which the amorphous alkaloids will be precipitated, including quinamine if present.

Uses—Cinchona bark enjoys the reputation of being a most valuable remedy in fevers. But the uncertainty of its composition and its inconvenient bulk render it a far less eligible form of medicine than the alkaloids themselves. It is nevertheless much used as a general tonic in various pharmaceutical preparations.

As to the alkaloids, the only one which is in general use is quinine. The neglect of the others is a regrettable waste, which the result of recent investigations ought to obviate. In the year 1866 the Madras Government appointed a Medical Commission to test the respective efficacy in the treatment of fever, of Quinine, Quinidine, Cinchonine and Cinchonidine. Of the sulphates of these alkaloids, a due supply, specially prepared under Mr. Howard’s superintendence, was placed at the disposal of the Commission. From the report it appears that the number of cases of paroxysmal malarious fevers treated was 2472,—namely 846 with Quinine, 664 with Quinidine, 569 with Cinchonine, and 403 with Cinchonidine. Of these 2472 cases, 2445 were cured, and 27 failed. The difference in remedial value of the four alkaloids, as deduced from these experiments, may be thus stated:—

Quinidine— ratio of failure per 1000 cases treated 6

Quinine ”” 7

Cinchonidine ”” 10

Cinchonine ”” 23

The Indian Government, acting on the recommendation of Mr. Howard, has officially advised (Dec. 16, 1873) the more free use India of cinchona alkaloids other than quinine, and especially of sulphate of cinchonidine, which is procurable in abundance from Red Bark. Quinidine on the other hand, which has proved the most valuable of all, is only obtainable from a few barks and in very limited amount.

Dr. de Vry since 1876 advocates the use of what he calls Quinetum. This preparation is obtained by exhausting the barks with slightly acidulated water, and precipitating the whole amount of alkaloids by caustic soda. In India the remedy is known as “the Febrifuge.”

Adulteration—There is not now any frequent importation of spurious cinchona barks, but the substitution of bad varieties for good is sufficiently common. To discriminate these in a positive manner by ascertaining the percentage of quinine, which is the chief criterion of value, recourse must be had to chemical analysis, a method of performing which has been described. Entirely worthless barks may be easily recognized by means of Grahe’s test (p. 363). Modern Works relating to Cinchona.

The following enumeration has been drawn up for the sake of those desiring more ample information than is contained in the foregoing pages, but it has no pretension to be a complete list of all publications that have lately appeared on the subject.

Berg (Otto), Chinarinden der pharmakognostischen Sammlung zu Berlin. Berlin, 1865, 4°. 48 pages and 10 plates showing the microscopic structure of barks.

Bergen (Heinrich von), Monographie der China. Hamburg, 1826, 4°. 348 pages and 7 coloured plates representing the following barks:—China rubra, Huanuco, Calisaya, flava, Huamalies, Loxa, Jaen. An exhaustive work for its period in every direction.

Blue books—East India (Chinchona Plant). Folio.

a. Copy of Correspondence relating to the introduction of the Chinchona Plant into India, and to proceedings connected with its cultivation from March 1852 to March 1863. Ordered by the House of Commons to be printed, 20 March 1863. 272 pages.

Contains Correspondence of Royle, Markham, Spruce, Pritchett, Cross, McIvor, Andersen and others, illustrated by 5 maps.

b. Copy of further Correspondence relating to the introduction of the Chinchona Plant into India, and to proceedings connected with its cultivation, from April 1863 to April 1866. Ordered by the House of Commons to be printed, 18 June 1866. 379 pages.

Contains Monthly Reports of the plantations on the Neilgherry Hills; Annual Reports for 1863-64, 1864-65, with details of method of propagation and cultivation, barking, mossing, attacks of insects, illustrated by woodcuts and 4 plates; report of Cross’s journey to Pitayo, with map; Cinchona cultivation in Wynaad, Coorg, the Pulney Hills and Travancore, with map; in British Sikkim, the Kangra, Valley (Punjab), the Bombay Presidency, and Ceylon.

c. Copy of all Correspondence between the Secretary of State for India and the Governor-General, and the Governors of Madras and Bombay, relating to the cultivation of Chinchona Plants, from April 1866 to April 1870. Ordered by the House of Commons to be printed, 9 August 1870. 285 pages.

Contains reports on the Neilgherry and other plantations, with map; appointment of Mr. Broughton as analytical chemist, his reports and analyses; reports on the relative efficacy of the several cinchona alkaloids, on cinchona cultivation at Darjiling and in British Burma.

d. Copies of the Chinchona Correspondence (in continuation of return of 1870), from August 1870 to July 1875. Ordered by the House of Commons to be printed, 21 June 1877. 190 pages.

Contain also reports on the alkaloid manufactory in India, collection and shipment of barks, and analyses of barks.

Delondre (Augustin Pierre) et Bouchardat (Apollinaire), Quinologie, Paris, 1854, 4°. 48 pages, and 23 good coloured plates exhibiting all the barks then met with in commerce.

Delondre (Augustin), see Soubeiran.

Gorkom (K. W. van), Die Chinacultur auf Java, Leipzig, 1869, 61 pages. An account of the management of the Dutch plantation.

Hesse (Oswald). This chemist has summarized his elaborate researches on Cinchona in the German Dictionary of Chemistry, articles Chinin, Cinchonin, etc. 1876-1877.

Howard (John Eliot), Illustrations of the Nueva Quinologia of Pavon. London, 1862, folio, 163 pages and 30 beautiful coloured plates.—Figures of Cinchona mostly taken from Pavon’s specimens in the herbarium of Madrid, and three plates representing the structure of several barks.

Howard (J. E.), Quinology of the East India Plantations. London, 1869, folio x. and 43 pages, with 3 coloured plates exhibiting structural peculiarities of the barks of cultivated Cinchonæ.

Howard (J. E.) The same, parts ii. and iii., Lond. 1876, folio xiv. and 74 p., with 2 views, 2 black plates and 13 coloured figures of Cinchona Calisaya (Ledgeriana), C. officinalis, C. pitayensis, and others.

Karsten (Hermann), Die medicinischen Chinarinden Neu-Granada’s. Berlin, 1858, 8°. 71 pages, and 2 plates showing microscopic structure of a few barks. An English translation prepared under the supervision of Mr. Markham, has been printed by the India Office under the title of Notes on the Medicinal Cinchona Barks of New Granada by H. Karsten, 1861. The plates have not been reproduced.

Karsten (Hermann), Floræ Columbiæ terrarumque adjacentium specimina selecta. Berolini, 1858, folio. Beautiful coloured figures of various plants including Cinchona, under which name are several species usually referred to other genera. Only three parts have been published.

King (George), A Manual of Cinchona cultivation in India. Calcutta, 1876, 80 pages, small folio.

Kuntze (Otto), Cinchona. Arten, Hybriden and Cultur der Chininbäume. Leipzig, 1878. 124 pages and 3 plates. A review of this book will be found in the Archiv der Pharmacie, 213, (1878) 473-480.

McIvor (W. G.) Notes on the propagation and cultivation of the medicinal Cinchonas or Peruvian bark trees. Madras, 1867, 33 pages, 9 plates. The author explains the “mossing system” alluded to p. 362.

McIvor (William Graham), A letter on the cultivation of Chinchona on the Nilgiris. Ootacamund, 1876, 27 pages.

Markham (Clements Robert), The Chinchona Species of New Granada, containing the botanical descriptions of the species examined by Drs. Mutis and Karsten; with of their labours. London, 1867, 8°. 139 pages and 5 plates. The plates are not coloured, yet are good reduced copies of those contained in Karsten’s Flora Columbiæ; they represent the following:—Cinchona corymbosa, C. Trianæ, C. lancifolia, C. cordifolia, C. tucujensis.

Markham. A Memoir of the Lady Ana de Osorio, Countess of Chinchon, vice-queen of Peru (a.d. 1629-1639), with a plea for the correct spelling of the Chinchona genus. London, 1874, 4°. 99 pages, with a map, heraldic figures and views.

See also Hanbury, Science Papers, 1876, p. 475.

Miquel (Friedrich Anton Wilhelm), De Cinchonæ speciebus> quibusdam, adjectis iis quæ in Java coluntur. Commentatio ex Annalibus Musei Botanici Lugduno-Batavi exscripta. Amstelodami, 1869,4°. 20 pages.

Oudemans (Anthony Cornelis), Sur le pouvoir rotatoire spécifique des principaux alcaloïdes du quinquina. Archives néerlandaises, x. (1875), 193-268, and xii. (1877).

Phoebus (Philipp), Die Delondre-Bouchardat’schen China-Rinden. Giessien, 1864, 8°. 75 pages and a table. The author gives a description without figures, of the microscopic structure of the type-specimens figured in Delondre and Bouchardat’s Quinologie.

Planchon (Gustave), Des Quinquinas. Paris et Montpellier, 1864, 8°. 150 pages. A description of the cinchonas and their barks. An English translation has been issued under the superintendence of Mr. Markham by the India Office, under the title of Peruvian Barks by Gustave Planchon. London, printed by Eyre and Spottiswoode, 1866.

Soubeiran (J. Léon) et Delondre (Augustin), De l’introduction et de l’acclimation des Cinchonas dans les Indes néerlandaises et dans les Indes britanniques. Paris, 1868, 8°. 165 pages.

Triana (José), Nouvelles études sur les Quinquinas. Paris, 1870, folio, 80 pages, and 33 plates. An interesting account of the labours of Mutis, illustrated by uncoloured copies of some of the drawings prepared by him in illustration of his unpublished Quinologia de Bogotá, especially of the several varieties of Cinchona lancifolia; also an enumeration and short descriptions of all the species of Cinchona, and of New Granadian plants (chiefly Cascarilla) formerly placed in that genus.

An abstract of the book will be found in Just’s Botanischer Jahresbericht für 1873, 484-494.

Vogl (August), Chinarinden des Wiener Grosshandels und der Wiener Sammlungen. Wien, 1867, 8°. 134 pages, no figures. A very exhaustive description of the microscopic structure of the barks occurring in the Vienna market, or preserved in the museums of that city.

Vogl (A.), Beiträge zur Kenntniss der sogenannten falschen Chinarinden. Wien, 1876, 4°. 26 pages, 7 microscopic sections.

Vrij (John Eliza de), Kinologische studiën. More than 30 papers published since 1868 in the Nieuw Tijdschrift voor de Pharmacie in Nederland. They are chiefly devoted to the chemistry of the barks from Java and British India.

Weddell (Hugh Algernon), Histoire naturelle des Quinquinas, ou monographie du genre Cinchona, suivie d’une description du genre Cascarilla et de quelques autres plantes de la même tribu. Paris, 1849, folio, 108 pages, 33 plates, and map. Excellent uncoloured figures of Cinchona and some allied genera, and beautiful coloured drawings of the officinal barks. Plate I. exhibits the anatomical structure of the plant; Plate II. that of the bark.

Weddell (H. A.), Notes sur les Quinquinas, Extrait des Annales des Sciences naturelles, 5ᵉ série, tomes xi. et xii. Paris, 1870, 8°. 75 pages. A systematic arrangement of the genus Cinchona, and description of its (33) species, accompanied by useful remarks on their barks. An English translation has been printed by the India Office with the title—Notes on the Quinquinas by H. A. Weddell, London, 1871, 8°. 64 pages. A German edition by Dr. F. A Flückiger has also appeared under the title Uebersicht der Cinchonen von H. A. Weddell. Schaffhausen and Berlin, 1871, 8°. 43 pages, with additions and indexes.

Radix Ipecacuanhæ.

Ipecacuanha Root, Ipecacuan; F. Racine d’Ipécacuanha annelee; G. Brechwurzel.

Botanical Origin—Cephaëlis Ipecacuanha A. Richard—This is a small shrub, 8 to 16 inches high, with an ascending, afterwards erect, simple stem, and somewhat creeping root, growing socially in moist and shady forests of South America, lying between 8° and 22° S. lat., especially in the Brazilian provinces of Pará, Maranhão, Pernambuco, Bahia, Espiritu Santo, Minas, Rio de Janeiro, and São Paulo. Within the last half century, it has been discovered in the vast interior province of Matto Grosso, chiefly in that part of it which forms the valley of the Rio Paraguay. From information given to Weddell, it would seem probable that the plant extends beyond the frontiers of Brazil to the Bolivian province of Chiquitos.

The root which is brought into commerce is furnished chiefly by the region lying between the towns of Cuyabá, Villa Bella, Villa Maria, and Diamantina in the province of Matto Grosso; but to some extent also by the woods in the neighbourhood of the German colony of Philadelphia on the Rio Todos os Santos, a tributary of the Mucury, north of Rio de Janeiro.

Prof. Balfour of Edinburgh, who has paid much attention to the propagation of ipecacuanha, finds that the plant exists under two varieties, of which he has published figures; they may be thus distinguished:

a. Stem woody, leaves of firm texture, elliptic or oval, wavy at the edges, with but few hairs on surface and margin. Long in cultivation: origin unknown.

b. Stem herbaceous, leaves less firm in texture, more hairy on margin, not wavy. Grows in the neighbourhood of Rio de Janeiro.

The plant cultivated in India seems disposed to run into several varieties, but according to the experience gained in Edinburgh, the diversity of form apparent in young plants tends to disappear with age.

History—In an account of Brazil, written by a Portuguese friar, who, it would seem, had resided in that country from about 1570 to 1600, and published by Purchas, mention is made of three remedies for the bloody flux, one of which is called Igpecaya or Pigaya; the drug here spoken of is probably that under notice.

Piso and Marcgraf in their scientific exploration of Brazil met with two kinds of ipecacuanha; the one provided with a brown root is Cephaëlis Ipecacuanha, which they figured. The root of the other variety, which they called Ipecacuanha blanca, is that of Richardsonia scabra (see page 376 below). Piso and Marcgraf described the virtues of these roots, apparently supposing them to be much the same as to their action. Although in common use in Brazil, ipecacuanha was not employed in Europe prior to the year 1672. At that date, a traveller named Legras brought from South America a quantity of the root to Paris, some of which came into the possession of the “maître appoticaire” Claquenelle. It would appear that the root was prescribed from the latter by Legras (said to have been himself acquainted with the practice of medicine), and also by Jean Adrien Helvetius, a young Dutch physician, then living in Paris. Yet no success at first was obtained, the drug being administered in too large doses. In 1680, a merchant of Paris named Garnier became possessed of 150 lb. of ipecacuanha, the valuable properties of which in dysentery he vaunted to his medical attendant Afforty, and to Helvetius. Garnier on his convalescence made a present of some of the new drug to Afforty, who attached to it but little importance. Helvetius, on the other hand, was induced to prescribe the root in cases of dysentery, which he did with the utmost success. It is stated by Eloy that Helvetius even caused placards to be affixed to the corners of the streets (about the year 1686), announcing his successful treatment with the new drug, supplies of which he obtained through Garnier from Spain, and sold as a secret medicine. The fame of the cures effected by Helvetius reached the French Court, and caused some trials of the drug to be made at the Hôtel Dieu. These having been fully successful, Louis XIV. accorded to Helvetius the sole right of vending his remedy. Subsequently several great personages, including the Dauphin of France, having experienced its benefit, the king consulted his physician, Antoine d’Aquin, and the well-known Jesuit Père François de Lachaise, who had become the King’s confessor in 1675. Through them was chiefly negotiated the purchase from Helvetius of his secret, for 1000 louis d’or, and made public in 1688. The right of Helvetius to this payment was disputed in law by Garnier, but maintained by a decision of the Châtelet of Paris.

The botanical source of ipecacuanha was the subject of much dispute until finally settled by Antonio Bernardino Gomez, a physician of the Portuguese navy, who brought authentic specimens from Brazil to Lisbon in the year 1800.

Collection—The ipecacuanha plant, Poaya of the Brazilians, grows in valleys, yet prefers spots which are rather too much raised to be inundated or swampy. Here it is found under the thick shade of ancient trees growing mostly in clumps. In collecting the root, the poayero, for so the collector of poaya is called, grasps in one handful if he can, all the stems of a clump, pushing under it obliquely into the soil a pointed stick to which he gives a see-saw motion. A lump of earth enclosing the roots is thus raised; and, if the operation has been well performed, those of the whole clump are got up almost unbroken. The poayero shakes off adhering soil, places the roots in a large bag which he carries with him, and goes on to seek other clumps. A good collector may thus get as much as 30 lb. of roots in the day; but generally a daily gathering does not exceed 10 or 12 lb., and there are many who scarcely get 6 or 8 lb. In the rainy season, the ground being lighter, the roots are removed more easily than in dry weather. The poayeros, who work in a sort of partnership, assemble in the evening, unite their gatherings, which having been weighed, are spread out to dig. Rapid drying is advantageous; the root is therefore exposed to sunshine as much as possible, and if the weather is favourable, it becomes dry in two or three days. But it has always to be placed under cover at night on account of the dew. When quite dry, it is broken into fragments, and shaken in a sieve in order to separate adherent sand and earth, and finally it is packed in bales for transport.

The harvest goes on all the year round, but is relaxed a little during the rains, on account of the difficulty of drying the produce. As fragments of the root grow most readily, complete extirpation of the plant in any one locality does not seem probable. The more intelligent poayeros of Matto Grosso are indeed wise enough intentionally to leave small bits of root in the place whence a clump has been dug, and even to close over the opening in the soil.

Cultivation—The importance in India of ipecacuanha as a remedy for dysentery, and the increasing costliness of the drug, have occasioned active measures to be taken for attempting its cultivation in that country. Though known for several years as a denizen of botanical gardens, the ipecacuanha plant has always been rare, owing to its slow growth and the difficulty attending its propagation.

It was discovered in 1869 by McNab, curator of the Botanical Garden of Edinburgh, that if the annulated part of the root of a growing ipecacuanha plant be cut into short pieces even only ¹/₁₆ of an inch thick, and placed in suitable soil, each piece will throw out a leaf-bud and become a separate plant. Lindsay, a gardener of the same establishment, further proved that the petiole of the leaf is capable of producing roots and buds, a discovery which has been utilized in the propagation of the plant at the Rungbi Cinchona plantation in Sikkim.

In 1871, well-formed fruits were obtained from the ipecacuanha plants growing in the Edinburgh Botanical Garden: this was promoted by artificial fertilization, especially when the flowers of a plant producing long styles were fertilized with the pollen of one having short styles,—for Cephaëlis like Cinchona has dimorphic flowers.

With regard to the acclimatization of the plant in India, much difficulty has been encountered, and successful results are still problematical. The first plant was taken to Calcutta by Dr. King in 1866, and by 1868 had been increased to nine; but in 1870-71, it was reported that, notwithstanding every care, the plants could not be made to thrive. Three plants which had been sent to the Rungbi plantation in 1868, grew rather better; and by adopting the method of root propagation, they were increased by August 1871, to 300. Three consignments of plants, numbering in all 370, were received from Scotland in 1871-72, besides a smaller number from the Royal Gardens, Kew. From these various collections, the propagation has been so extensive, that on 31 March 1873, there were 6,719 young plants in Sikkim, in addition to about 500 in Calcutta, and much more in 1874.

The ipecacuanha plant in India has been tried under a variety of conditions as regards sun and shade, but thus far with only a moderate amount of success. The best results are those that have been obtained at Rungbi, 3000 feet above the sea, where the plants, placed in glazed frames, were reported in May 1873 as in the most healthy condition.

Description—The stem creeps a little below the surface of the soil, emitting a small number of slightly branching contorted roots, a few inches long. These roots when young are very slender and thread-like, but grow gradually knotty and become by degrees invested with a very thick bark, transversely corrugated or ringed. Close examination of the dry root shows that the bark is raised in narrow warty ridges, which sometimes run entirely round the root, sometimes encircle only half its circumference. The whole surface is moreover minutely wrinkled longitudinally. The rings or corrugations of a full sized root number about 20 in an inch; not unfrequently they are deep enough to penetrate to the wood.

The root attains a maximum diameter of about ²/₁₀ of an inch; but as imported, a large proportion of it is much smaller. The woody central part is scarcely ¹/₂₀ of an inch in diameter, subcylindrical, sometimes striated, and devoid of pith.

Ipecacuanha is of a dusky grey hue, occasionally of a dull ferruginous brown. The root is hard, breaks short and granular (not fibrous), exhibiting a resinous, waxy, or farinaceous interior, white or greyish. The bark, which constitutes 75 to 80 per cent. of the entire root, may be easily separated from the less brittle wood. It has a bitterish taste and faint, musty smell; when freshly dried it is probably much more odorous. The wood is almost tasteless. In the drug of commerce the roots are always much broken, and there is often a considerable separation of bark from wood; portions of the non-annulated, woody, subterraneous stem are always present.

During the last few years there has been imported into London a variety of ipecacuanha, distinguished as Carthagena or New Granada Ipecacuanha, and differing from the Brazilian drug chiefly in being of larger size. Thus, while the maximum diameter of the annulated roots of Brazilian ipecacuanha is about ²/₁₀ of an inch, corresponding roots of the New Granada variety attain nearly ³/₁₀. The latter, moreover, has a distinct radiate arrangement of the wood, due to a greater developement of the medullary rays, and is rather less conspicuously annulated. Lefort (1869) has shown that the New Granada drug is a little less rich in emetine than the ipecacuanha of Brazil.

Mr. R. B. White, of Medellin in the valley of the Cauca, New Granada, near which place the drug has been collected, has been good enough to send us herbarium specimens of the plant with roots attached; they agree entirely with Cephaëlis Ipecacuanha.

Microscopic Structure—The root is coated with a thin layer of brown cork-cells; the interior cortical tissue is made up of a uniform parenchyme, in which medullary rays cannot be distinguished. In the woody column they are obvious; the prevailing tissue consists of short pitted vessels. The cortical parenchyme and the medullary rays are loaded with small starch granules. Some cells of the interior part of the bark contain however only bundles of acicular crystals of oxalate of calcium.

Chemical Composition—The peculiar principles of ipecacuanha are Emetine and Ipecacuanhic Acid, together with a minute proportion of a fœtid volatile oil. The activity of the drug appears to be due solely to the alkaloid, which taken internally is a potent emetic.

Emetine, discovered in 1817 by Pelletier and Magendie, is a bitter substance with distinct alkaline reaction, amorphous in the free state as well as in most of its salts; we have succeeded in preparing a crystallized hydrochlorate.

The root yields of the alkaloid less than 1 per cent.; the numerous higher estimates that have been given relate to impure emetine, or have been arrived at by some defective methods of analysis.

The formula assigned to emetine by Reich (1863) was C₂₀H₃₀N₂O, that given by Glénard (1875) C₁₅H₂₂NO₂, and lastly that found in 1877 by Lefort and F. Würtz, C₂₈H₄₀N₂O₅.

The alkaloid may be obtained by drying the powdered bark of the root with a little milk of lime, and exhausting the mixture with boiling chloroform, petroleum-benzin or ether. It is a white powder turning brown on exposure to light and softening at 70° C. Emetine assumes an intense and permanent yellow colour with solution of chlorinated lime and a little acetic acid, as shown by Power (1877). A solution containing but ¹/₆₀₀₀ of emetine still displays that reaction. We found the alkaloid to be destitute of rotatory power, at least in the chloroform solution.

The above reactions may be easily shown thus:—Take 10 grains of powdered ipecacuanha, and mix them with 3 grains of quicklime and a few drops of water. Dry the mixture in the water bath and transfer it to a vial containing 2 fluid drachms of chloroform: agitate frequently, then filter into a capsule containing a minute quantity of acetic acid, and allow the chloroform to evaporate. Two drops of water now added will afford a nearly colourless solution of emetine, which, placed in a watch-glass, will readily give amorphous precipitates upon addition of a saturated solution of nitrate of potassium, or of tannic acid, or of a solution of mercuric iodide in iodide of potassium. To the nitrate Power’s test may be further applied.

If the wood separated as exactly as possible from the bark is used, and the experiment performed in the same way, the solution will reveal only traces of emetine. By addition of nitrate of potassium, no precipitate is then produced, but tannic acid or the potassico-mercuric iodate afford a slight turbidity. This experiment confirms the observation that the bark is the seat of the alkaloid, as might indeed be inferred from the fact that the wood is nearly tasteless.

Ipecacuanhic Acid, regarded by Pelletier as gallic acid, but recognised in 1850 as a peculiar substance by Willigk, is reddish-brown, amorphous, bitter, and very hygroscopic. It is related to caffetannic and kinic acids; Reich has shown it to be a glucoside.

Ipecacuanha contains also, according to Reich, small proportions of resin, fat, albumin, and fermentable and crystallizable sugar; also gum and a large quantity of pectin. The bark yielded about 30 per cent., and the wood more than 7 per cent. of starch.

Commerce—The imports of ipecacuanha into the United Kingdom in 1870 amounted to 62,952 lb., valued at £16,639.

Uses—Ipecacuanha is given as an emetic, but much more often in small doses as an expectorant and diaphoretic. In India it has proved of late a most important remedy for dysentery. Since the year 1858 when the administration of ipecacuanha in large (30 grains) doses began to be adopted, the mortality in the cases treated for this complaint has greatly diminished.

Adulteration and Substitutes—It can hardly be said that ipecacuanha as at present imported is ever adulterated. Although it may contain an undue proportion of the woody stems of the plant, it is not fraudulently admixed with other roots. But it very often arrives much deteriorated by damp: we have the authority of an experienced druggist for saying that at least three packages out of every four offered in the London drug sales, have either been damaged by sea-water or by damp during their transit to the coast.

Several roots have been described as False Ipecacuanha, but we know not one that would not be readily distinguished at first sight by any druggist of average knowledge and experience.

In Brazil the word Poaya is applied to emetic roots of plants of at least six genera, belonging to the orders Rubiaceæ, Violarieæ, and Polygaleæ; while in the same country, the name Ipecacuanha is used for various species of Ionidium as well as for Cephaëlis.

Some of these roots, which are occasionally brought to Europe under the notion that they may find a market, have been described and figured by pharmacologists. We shall notice only the following:—

1. Large Striated Ipecacuanha—This is the root of Psychotria emetica Mutis (Rubiaceæ), a native of New Granada. It is considerably stouter than true ipecacuanha, but consists like the latter of a woody column covered with a thick brownish bark. The latter, though marked here and there with constrictions and fissures, is not annulated like ipecacuanha, but has very evident longitudinal furrows. But its most remarkable character is that it remains soft and moist, tough to the knife, even after many years; and the cut surface has a dull violet hue. The root has a sweetish taste and abounds in sugar; its decoction is not rendered blue by iodine, nor is any starch to be detected by means of the microscope. The drug occasionally appears in the London market.

2. Small Striated Ipecacuanha—This drug in outward appearance closely resembles the preceding, but is usually of smaller size, sometimes much smaller and in short pieces tapering towards either end. It also differs in being brittle, abounding in starch, and having its woody column provided with numerous pores, easily visible under a lens. Prof. Planchon of Paris, who has particularly examined both varieties of Striated Ipecacuanha, is of opinion that the drug under notice may be derived from some species of Richardsonia.

3. Undulated Ipecacuanha—The root thus called is that of Richardia scabra L. (Richardsonia scabra St. Hilaire), a plant of the same order as Cephaëlis, very common in Brazil, where it grows in cultivated ground and sandy places, or by roadsides, and even in the less frequented streets of Rio de Janeiro. Authentic specimens have been forwarded to us by Mr. Glaziou of Rio de Janeiro, and Mr. J. Correa de Méllo of Campinas; and we have also had ample supplies of the plant cultivated by us near London and at Strassburg, where Richardsonia succeeds in the open air.

The root in the fresh state is pure white, but by drying becomes of a deep iron-grey. In the Brazilian specimens, there is a short crown emitting as many as a dozen prostrate stems; below this there is generally, as in true ipecacuanha, a naked woody portion, which extends downwards into a thicker root, ²/₁₀ of an inch in diameter, and six or more inches long. This part of the root is marked by deep fissures on alternate sides, which give it a knotty, sinuous, or undulating outline. It has a brittle, very thick bark, white and farinaceous within, surrounding a strong flexible slender woody column. The root has an earthy odour not altogether unlike that of ipecacuanha, and a slightly sweet taste. It affords no evidence of emetine when tested in the manners described at p. 374, and can therefore easily be distinguished from the true drug.

Valerianaceæ.

Radix Valerianæ.

Valerian Root; F. Racine de Valériane; G. Baldrianwurzel.

Botanical Origin—Valeriana officinalis L., an herbaceous perennial plant, growing throughout Europe from Spain to Iceland, the North Cape and the Crimea, and extending over Northern Asia to the coasts of Manchuria. The plant is found in plains and uplands, ascending even in Sweden to 1200 feet above the sea-level.

In England, valerian is cultivated in many villages near Chesterfield in Derbyshire, the wild plant which occurs in the neighbourhood not being sufficiently plentiful to supply the demand.

In Vermont, New Hampshire and New York, as well as in Holland, the plant is grown to some extent, but by far the largest supply would appear to be grown in the environs of the German town Cölleda, not far from Leipzig.

Valerian is propagated by separating the young plants which are developed at the end of runners emitted from the rootstock.

The wild plant, according to the situation it inhabits, exhibits several divergent forms. Among eight or more varieties noticed by botanists, we may especially distinguish α. major with a comparatively tall stem and all the leaves toothed, β. minor (V. angustifolia Tausch) with entire or slightly dentate leaves, and also V. sambucifolia Mikan, having only 4 or 5 pairs of leaflets.

History—The plant which the Greeks and Romans called Φοῦ or Phu, and which Dioscorides and Pliny describe as a sort of wild nard, is usually held to be some species of valerian.

The word Valeriana is not found in the classical authors. We first meet with it in the 9th or 10th century, at which period and for long afterwards, it was used as synonymous with Phu or Fu.

Thus in the writings of Isaac Judæus occurs the following:—“Fu id est valeriana, melior rubea et tenuis et quæ venit de Armenia et est diversa in sua complexione....”

Constantinus Africanus—“Fu, id est valeriana. Naturam habet sicut spica nardi....”

The word Valeriane occurs in the recipes of the Anglo-Saxon leeches written as early as the 11th century. Valeriana, Amantilla and Fu are used as synonymous in the Alphita, a mediæval vocabulary of the school of Salernum.

Saladinus of Ascoli directs (circa a.d. 1450) the collection in the month of August of “radices fu id est valerianæ.”

Valerian was anciently called in English Setwall, a name properly applied to Zedoary; and the root was so much valued for its medicinal virtues, that as Gerarde (1567) remarks, the poorer classes in the north of England esteemed “no broths, pottage, or physicall meats” to be worth anything without it. Its odour, now considered intolerable, was not so regarded in the 16th century, when it was absolutely the custom to lay the root among clothes as a perfume in the same way as those of Valeriana celtica L. and the Himalayan valerians are still used in the East.

Some of the names applied to valerian in Northern and Central Europe are remarkable. Thus in Scandinavia we find Velandsrot, Velamsrot, Vandelrot (Swedish); Vendelród, Venderód, Vendingsród (Norwegian); and Velandsurt (Danish)—names all signifying Vandels’ root. Valerian is also called in Danish Danmarks græs. Among the German-speaking population of Switzerland, a similar word to the last, namely Tannmark, is applied to valerian. The Denemarcha mentioned by St. Hildegard, about a.d. 1160, is the same. These names seem to point to some connexion with Northern Europe which we are wholly unable to explain.

Pentz, a pharmaceutical assistant at Pyrmont, was the first, in 1829, to draw attention to the acid reaction of the distilled water of valerian. Another German assistant, Grote, at Verden, showed in 1831 that the acidity was by no means due to acetic acid, but to a peculiar kind of acid. The latter was identified in 1843 by Dumas with the acid artificially obtained from amylic alcohol and that extracted in 1817 by Chevreul from the fat of dolphins.

Description—The valerian root of the shops consists of an upright rhizome of the thickness of the little finger, emitting a few short horizontal branches, besides numerous slender rootlets. The rhizome is naturally very short, and is rendered still more so by the practice of cutting it in order to facilitate drying. The rootlets, which are generally 3 to 4 inches long, attain ⅒ of an inch in diameter, tapering and dividing into slender fibres towards their extremities. They are shrivelled, very brittle, and, as well as the rhizome, of a dull, earthy brown. When broken transversely, they display a dark epidermis, forming part of a thick white bark which surrounds a slender woody column. The interior of the rhizome is compact, firm and horny, but when old becomes hollow, a portion of the tissue remaining however in the form of transverse septa.

The drug has a peculiar, somewhat terebinthinous and camphor-like odour, and a bitterish, aromatic taste. The root when just taken from the ground has no distinctive smell, but acquires its characteristic odour as it dries.

Microscopic Structure—In the rhizome as well as in the rootlets, the cortical part is separated from the central column by a dark cambial zone; the medullary rays are not distinctly obvious. In old rootstocks, sclerenchymatous cells are met with in the cortical tissue.

The parenchyme of the drug is loaded with small starch granules, brownish grains of tannic matter and drops of essential oil. Numerous oil ducts are met with in the outer layer of the tissue.

Chemical Composition—Volatile oil is contained in the dry root to the extent of ½ to 2 per cent., yet on an average appears scarcely to exceed ⁴/₅ per cent. This variation in quantity is partly explained by the influence of locality, a dry, stony soil yielding a root richer in oil than one that is moist and fertile. In the latter the plant may be distinguished as the variety sambucifolia, which has a less vigorous root, devoid of runners.

Schoonbroodt has shown that the most important influence is the recent condition of the root. He states that if the root is submitted to distillation when perfectly fresh, it yields a neutral water and a large quantity of essential oil. The latter has but a very faint odour, but by exposure to the air it slowly acidifies, especially if a little alkali is added, and acquires a strong smell. Valerianic Acid which is thus formed amounts to 6 per mille of the fresh root. The dried root yields a distillate of decided valerian odour, containing valerianic acid, but in proportion not exceeding 4 per mille of the root calculated as fresh.

The oil of valerian is of a very peculiar yellowish or brownish, sometimes even almost a little greenish hue, and possessing the characteristic odour of the drug. We found it to deviate the plane of polarization from 11° to 13° to the left when examined by Wild’s Polaristrobometer in a column of 50 millimetres. By submitting it to fractional distillation we noticed that it affords a magnificent blue fraction. A superb violet or blue colour is produced if one drop of the crude oil dissolved in about 20 drops of bisulphide of carbon is mixed with 1 drop of nitric acid 1·20 sp. gr. Other colorations are produced if bromine or concentrated sulphuric acid are used; even the tincture of valerian displays similar reactions.

Bruylants (1878) has isolated from oil of valerian—1st. A hydrocarbon, C₁₀H₁₆, boiling at 157° C., yielding a crystallized compound with HCl. 2nd. The liquid compound C₁₀H₁₈O, which by means of chromic acid affords common camphor and formic, acetic and valerianic acids, which are met with in old valerian root, owing no doubt to the slow oxidation of the compound C₁₀H₁₈O. 3rd. There is also present a crystallizable compound of the same composition, which is probably identical with the camphor of Dryobalanops aromatica (see our article on Camphora). It would appear that this substance is of alcoholic nature, being combined in the root with the 3 organic acids mentioned under 2nd. On distilling, these compound ethers are resolved partly into the alcohol C₁₀H₁₈O (borneol) and the acids. This decomposition is fully performed, if the root is macerated with alkaline water, and then, on distilling, a slight excess of sulphuric acid is added. 4th. At about 300° a greenish portion is coming over, which can be obtained colourless by again rectifying it. This oil assumes intense colorations if it is shaken with concentrated mineral acids; it becomes blue by distilling it over potash.

Valerianic acid as afforded by the root is not agreeing with normal valerianic acid. It is, more exactly, isovalerianic acid, or isopropyl-acetic acid: (CH₃)₂CH·CH₂COOH, which is produced by Valeriana as well as by Archangelica officinalis and Viburnum Opulus. The same acid also may be obtained from the fat of Dolphinus globiceps.

After the root has been submitted to the distillation of the oil, there is found a strongly acid residue containing malic acid, resin, and sugar,—the last capable, according to Schoonbroodt, of reducing cupric oxide.

Uses—Valerian is employed as a stimulant and antispasmodic.

Substitutes—In the London market there has been offered “Kesso” the root of Patrinia scabiosaefolia Link, a Japanese herb of the order Valerianaceæ. This drug consists of a very short rootstock giving off a large number of rootlets about 5 inches long and ⅒ of an inch in diameter. By the absence of a well-marked upright rhizome in this Japanese Valerian it is widely differing from our Valerian, although at first sight it agrees to some extent with it. As to the odour and taste we find Kesso almost identical with true Valerian.

The less aromatic and now disused root of Valeriana Phu L. consists of a thicker rhizome which lies in the earth obliquely; it is less closely annulated and rooted at the bottom only. It resembles by no means true Valerian.

Compositæ.

Radix Inulæ.

Radix Enulæ, Radix Helenii; Elecampane; F. Racine d’Aunée; G. Alantwurzel.

Botanical Origin—Inula Helenium L.—This stately perennial plant is very widely distributed, occurring scattered throughout the whole of central and southern Europe, and extending eastward to the Caucasus, Southern Siberia and the Himalaya. It is found here and there apparently wild in the south of England and Ireland, as well as in Southern Norway and in Finland (Schübeler).

Elecampane was formerly cultivated in gardens as a medicinal and culinary plant, and in this manner has wandered to North America. In Holland and some parts of England and Switzerland, it is cultivated on a somewhat larger scale, most largely probably near Cölleda (see p. 377).

History—The plant was known to the ancient writers on agriculture and natural history, and even the Roman poets were acquainted with it, and mention Inula as affording a root used both as a medicine and a condiment. Vegetius Renatus, about the beginning of the 5th century, calls it Inula Campana, and St. Isidore in the beginning of the 7th names it as Inula, adding—“quam Alam rustici vocant.” It is frequently mentioned in the Anglo-Saxon writings on medicine current in England prior to the Norman Conquest; it is also the “marchalan” of the Welsh Physicians of the 13th century and was generally well known during the middle ages. Not only was its root much employed as a medicine, but it was also candied and eaten as a sweetmeat.

Description—For pharmaceutical use, the root is taken from plants two or three years old; when more advanced, it becomes too woody. The principle mass of the root is a very thick short crown, dividing below into several fleshy branches of which the larger are an inch or two in diameter, covered with a pale yellow bark, internally whitish, and juicy. The smaller roots are dried entire; the larger are variously sliced, which occasions them to curl up irregularly. When dried, they are of a light grey, brittle, horny, smooth-fractured. Cut transversely the young root exhibits an indistinct radiate structure, with a somewhat darker cambial zone separating the thick bark from the woody nucleus. The pith is not sharply defined, and is often porous and hollow. In the older roots the bark is relatively much thinner, and the internal substance is nearly uniform. Elecampane root has a weak aromatic odour suggestive of orris and camphor, and a slightly bitter, not unpleasant, aromatic taste.

Microscopic Structure—The medullary rays, both of the woody column and the inner part of the bark (endophlœum), exhibit large balsam-ducts. In the fresh root they contain an aromatic liquid, which as it dries deposits crystals of helenin, probably derived from the essential oil. The parenchymatous cells of the drug are loaded with inulin in the form of splinter-like fragments, devoid of any peculiar structure.

Chemical Composition—It was observed by Le Febvre, as early as 1660, that when the root of elecampane is subjected to distillation with water a crystallizable substance collects in the head of the receiver from which it speedily passes on as the operation proceeds. Similar crystals may also be observed after carefully heating a thin slice of the root, and are even found as a natural efflorescence on the surface of root that has been long kept. They can be extracted from the root by means of alcohol and precipitated with water. Kallen (1874, 1876) showed that the crystals chiefly consist of the anhydride, C₁₅H₂₀O₂, of alantic acid, melting at 66° C. The anhydride, which is very little aromatic, can easily be sublimed, although it begins to boil only at 275°, yet not without decomposition. Alantic anhydride dissolves in caustic lye, but on saturating the solution with an acid, alantic acid, C₁₅H₂₂O₃, separates. It is not present in the root.

The anhydride is accompanied by a small quantity of Helenin, C₆H₈O, and Alantcamphor (i.e. Elecampane-camphor). The crystals of helenin have a slightly (?) bitterish taste, but no odour, and melt at 110°. The camphor, occurring in but very small amount, has not yet been analyzed; it agrees probably with the formula C₁₀H₁₆O; it melts at 64° C., and in taste and smell is suggestive of peppermint. It is very difficult entirely to remove helenin from alantcamphor, these substances being soluble to nearly the same extent in alcohol or ether. By distilling the second of them with pentasulphide of phosphorus, Cymene, C₁₀H₁₄, was obtained.

By distilling the root under notice with water, the alantic anhydride is chiefly obtained, but impregnated with Alantol, C₁₀H₁₆O (probably). The latter can be removed from the crystals by pressing them between folds of bibulous paper. On submitting this again to distillation, alantol is obtained as an aromatic liquid, boiling at 200°.

The substance most abundantly contained in elecampane root is Inulin, discovered in it by Valentine Rose at Berlin in 1804. It has the same composition as starch, C₆H₁₀O₅, but stands to a certain extent in opposition to that substance, which it replaces in the root-system of Compositæ. In living plants, inulin is dissolved in the watery juice, and on drying is deposited within the cells in amorphous masses, which in polarized light are inactive, and are not coloured by iodine. There are various other characters, by which inulin differs from starch. Thus for instance, inulin readily dissolves in about 3 parts of boiling water; the solution is perfectly clear and fluid, not paste-like; but on cooling deposits nearly all the inulin. The solution is levogyre and is easily transformed into uncrystallizable sugar. With nitric acid, inulin affords no explosive compound as starch does.

Sachs showed in 1864 that by immersing the roots of elecampane, or Dahlia variabilis or of many other perennial Compositæ, in alcohol or glycerin, inulin may be precipitated in a crystalline form. Its globular aggregates of needle-shaped crystals (“sphæro-crystals”) then exhibit under the polarizing microscope a cross similar to that displayed by starch grains.

The amount of inulin varies according to the season, but is most abundant in the autumn. Of the various sources for it, the richest appears to be elecampane. Dragendorff, who has made it the subject of a very exhaustive treatise, obtained from the root in October not less than 44 per cent., but in spring only 19 per cent.

In the roots of the Compositæ inulin is accompanied, according to Popp, by two closely allied substances, Synanthrose, C₁₂H₂₂O₁₁ + H₂O, and Inuloïd, C₆H₁₀O₅ + H₂O. Synanthrose is soluble in dilute alcohol, devoid of any rotatory power, and deliquescent. Inuloïd is much more readily soluble in water than inulin. Both these substances are probably present in elecampane.

Inulin is widely distributed in the perennial roots of compositæ, and has also been met with in the natural orders Campanulaceæ, Goodenovieæ (or Goodeniaceæ), Lobeliaceæ, Stylidieæ, and lastly by Kraus (1879) in the root of Ionidium Ipecacuanha St. Hilaire, Violaceæ; the formerly so-called Ipecacuanha alba lignosa (see p. 375, note 4).

Uses—Elecampane is an aromatic tonic, but as a medicine is now obsolete. It is chiefly sold for veterinary practice. In France and Switzerland (Neuchâtel), it is employed in the distillation of Absinthe.

Substitutes—Dioscorides in speaking of Costus root states that it is often mixed with that of elecampane of Kommagene (north-western Syria). The former, derived from Aplotaxis auriculata DC. (A. Lappa Decaisne, Aucklandia Costus Falconer), is remarkably similar to elecampane both in external appearance and structure. Costus is an important spice, incense and medicine in the east from the antiquity down to the present day; it would be of great interest to examine it chemically with regard to elecampane.

Radix Pyrethri.

Pellitory Root, Pellitory of Spain; F. Pyrèthre-salivaire; G. Bertramwurzel.

Botanical Origin—Anacylus Pyrethrum DC. (Anthemis Pyrethrum L.), a low perennial plant with small, much divided leaves, and a radiate flower resembling a large daisy. It is a native of northern Africa, especially Algeria, growing on the high plateaux that intervene between the fertile coast regions and the desert.

History—The πύρεθρον of Dioscorides was an umbelliferous plant, the determination of which must be left to conjecture. The pellitory of modern times was familiar to the Arabian writers on medicine, one of whom, Ibn Baytar, describes it very correctly from specimens gathered by himself near the city of Constantine in Algeria. The plant, says he, called by the Berbers sandasab, is found nowhere but in Western Africa, from which region it is carried to other countries.

Pellitory root is a favourite remedy in the East, and has long been an article of export by way of Egypt to India. An Arabic name for it is Aāqarqarhā or Akulkara, a word which, under slight variations, is found in the principal languages of India. In Germany, pellitory was known as early as the 12th century; it is named in the oldest printed works on materia medica. In the 13th century “pellitory of Spain” (Pelydr ysbain) was a proved “remedy for the toothache” with the Welsh physicians.

Description—The root as found in the shops is simple, 3 to 4 inches long by ⅜ to ⁴/₈ of an inch thick, cylindrical, or tapering, sometimes terminated at top by the bristly remains of leaves, and having only a few hair-like rootlets. It has a brown, rough, shrivelled surface, is compact and brittle, the fractured surface being radiate and destitute of pith. The bark, at most ¹/₂₅ of an inch thick, adheres closely to the wood, a narrow zone of cambium intervening. The woody column is traversed by large medullary rays in which, as in the bark, numerous dark resin-ducts are scattered. The root has a slight aromatic smell, and a persistent, pungent taste, exciting a singular tingling sensation, and a remarkable flow of saliva. The drug is very liable to the attacks of insects.

Microscopic Structure—The cortical part of this root is remarkable on account of its suberous layer, which is partly made up of sclerenchyme (thick-walled cells). Balsam-ducts (oil-cells) occur as well in the middle cortical layer as in the medullary rays. Most of the parenchymatous cells are loaded with lumps of inulin; pellitory in fact is one of those roots most abounding in that substance.

Chemical Composition—Pellitory has been analysed by several chemists, whose labours have shown that its pungent taste is due in great part to a resin, not yet fully examined. The root also contains a little volatile oil besides, sugar, gum, and a trace of tannic acid. The so-called Pyrethrin is a mixed substance.

Commerce—The root is collected chiefly in Algeria and is exported from Oran and to a smaller extent from Algiers. But from the information we have received from Colonel Playfair, British Consul-General for Algeria, and from Mr. Wood, British Consul at Tunis, it appears that the greater part is shipped from Tunis to Leghorn and Egypt. Mr. Wood was informed that the drug is imported from the frontier town of Tebessa in Algeria into the regency of Tunis, to the extent of 500 cantars (50,000 lb.) per annum.

Bombay imported in the year 1871-72, 740 cwt. of this drug, of which more than half was shipped to other ports of India.

Uses—Chiefly employed as a sialogogue for the relief of toothache, occasionally in the form of tincture as a stimulant and rubefacient.

Substitute—In Germany, Russia and Scandinavia, African pellitory is replaced by the root of Anacyclus officinarum Hayne, an annual herb long cultivated in Prussia and Saxony. Its root of a light grey is only half as thick as that of A. Pyrethrum, and is always abundantly provided with adherent remains of stalks and leaves. It is quite as pungent as that of the perennial species.

Flores Anthemidis.

Chamomile Flowers; F. Fleurs de Camomille Romaine; G. Römische Kamillen.

Botanical Origin—Anthemis nobilis L., the Common or Roman Chamomile, a small creeping perennial plant, throwing up in the latter part of the summer solitary flowerheads.

It is abundant on the commons in the neighbourhood of London, and generally throughout the south of England; and extends to Ireland, but is not a native of Scotland, except the islands of Bute and Cumbrae, where Anthemis is stated to grow wild. It is plentiful in the west and centre of France, Spain, Portugal, Italy, and Dalmatia; and occurs as a doubtful native in Southern and Central Russia.

History—The identification of the chamomile in the classical and other ancient authors seems to be impossible, on account of the large number of allied plants having similar inflorescence.

The chamomile has been cultivated for centuries in English gardens, the flowers being a common domestic medicine. The double variety was well known in the 16th century.

The plant was introduced, according to Gesner, into Germany from Spain about the close of the middle ages. Tragus first designated it Chamomilla nobilis, and Joachim Camerarius (1598), who had observed its abundance near Rome, gave it the name of Roman Chamomile.

Porta, about the year 1604, states that 100 pounds of Flores Chamœmeli yielded 2 drachmæ of a green volatile oil; we suppose he distilled the flowers under notice.

Production—The camomile is cultivated at Mitcham, near London, the land applied to this purpose being in 1864 about 55 acres, and the yield reckoned at about 4 cwt. per acre. The flowers are carefully gathered, and dried by artificial heat; and fetch a high price in the market.

The plant is grown on a large scale at Kieritzsch, between Leipzig and Altenburg, and near Zeiz and Borna, all in Saxony; and likewise to some extent in Belgium and France.

Description—The chamomile flowers found in commerce are never those of the wild plant, but are produced by a variety in which the tubular florets have all, or for the greater part been converted into ligulate florets. In the flowers of some localities this conversion has been less complete, and such flowers having a somewhat yellow centre, are called by druggists Single Chamomiles; while those in which all the florets are ligulate and white, are known as Double Chamomiles.

Chamomile flowers have the general structure found in the order Compositæ. They are ½ to ¾ of an inch across, and consist of a hemispherical involucre about ⅜ of an inch in diameter, composed of a number of nearly equal bracts, scarious at the margin. The receptacle is solid, conical, about ¼ of an inch in height, beset with thin, concave, blunt, narrow, chaffy scales, from the bases of which grow the numerous florets. In the wild plant, the outer of these, to the number of 12 or more, are white, narrow, strap-shaped, and slightly toothed at the apex. The central or disc florets are yellow and tubular, with a somewhat bell-shaped summit from which project the two reflexed stigmas. In the cultivated plant, the ligulate florets predominate, or replace entirely the tubular. The florets which are wholly destitute of pappus are reflexed, so that the capitulum when dried has the aspect of a little white ball. Minute oil-glands are sparingly scattered over the tubular portion of the florets of either kind. The flowers of chamomile, as well as the green parts of the plant, have a strong aroma, and a very bitter taste.

In trade, dried chamomile flowers are esteemed in proportion as they are of large size, very double, and of a good white—the last named quality being due in great measure to fine dry weather during the flowering period. Flowers that are buff or brownish, or only partially double, command a lower price.

Chemical Composition—Chamomile flowers yield from 0·6 to 0·8 per cent. of essential oil, which is at first of a pale blue, but becomes yellowish-brown in the course of a few months.

At Mitcham, oil of chamomile is usually distilled from the entire plant, after the best flowers have been gathered. The oil has a shade of green, to remove which it is exposed to sunlight; it thus acquires a brownish-yellow colour, at the same time throwing down a considerable deposit.

The investigations of several chemists, performed in 1878-79 in Fittig’s laboratory, have shown the oil to contain the following constituents:—At 147-148° C. isobutylic ethers and hydrocarbons are distilling, at 177° angelicate of isobutyl, at 200°-201° angelicate of isamyl, at 204°-205° tiglinate of isamyl (both these compound ethers answering to the formula C₅H₇O·OC₅H₁₁). In the residual portion hexylic alcohol, C₆H₁₃OH, and an alcohol of the formula C₁₀H₁₆O, are met with, both probably occurring in the form of compound ethers. By decomposing the angelicates and the tiglinate above named with potash, angelic acid, C₅H₈O₂, and tiglinic (or methylcrotonic) acid, isomeric to the former, are obtained to the extent of about 30 or more per cent. of the crude oil. In the oil examined by Fittig, angelic acid was prevailing; from another specimen E. Schmidt (1879) obtained but very little of it, tiglinic acid was by far prevailing (see also article Oleum Crotonis).

We have performed some experiments in order to isolate the bitter principle, but have not succeeded in obtaining it in a satisfactory state of purity; it forms a brown extract, apparently a glucoside. We can also confirm the statement that no alkaloid is present.

Uses—An infusion or an extract of chamomile is often used as a bitter stomachic and tonic.

Adulteration and Substitution—The flowerheads of Matricaria Chamomilla L., designated in Germany Common Chamomiles (gemeine Kamillen), are sometimes asked for in this country. In aspect as well as in odour, they are very different from the chamomiles of English pharmacy; they are quite single, not bitter, and have the receptacle devoid of scales and hollow.

A cultivated variety of Chrysanthemum Parthenium Pers., or Feverfew, with the florets all ligulate, and some scales on the receptacle (not having the receptacle naked, as in the wild form), common in gardens, has flowerheads exceedingly like double chamomiles. But they may be distinguished from the latter by their convex or nearly flat receptacle, with the scales lanceolate and acute, and less membranous.

The chamomiles of the Indian bazaars which are brought from Persia and known as Bābūnah, are (as we infer from the statement of Royle) the flowers of Matricaria suaveolens L., a slender form of M. Chamomilla, growing in Southern Russia, Persia, Southern Siberia, also in North America.

The fresh wild plant of Anthemis nobilis L., pulled up from the ground, is sold in London for making extract, a proceeding highly reprehensible supposing the extract to be sold for medicinal use.

Santonica.

Flores Cinæ, Semen Cinæ, Semen Santonicæ, Semen Zedoariæ, Semen Contra, Semen Sanctum; Wormseed; F. Semen-contra, Semencine, Barbotine; G. Wurmsamen, Zitwersamen.

Botanical Origin—Artemisia maritima, var. a. Stechmanniana Besser (A. Lercheana Karel. et Kiril, in Herbb. Kew, et Mus. Brit.; A. maritima var. a. pauciflora Weber, quoad Ledebour, Flor. Ross. ii. 570).

Artemisiæ of the section Seriphidium assume great diversity of form: they have been the object of attentive study on the part of the Russian botanists Besser (1834-35) and Ledebour (1844-46), whose researches have resulted in the union of many supposed species, under the head of the Linnæan Artemisia maritima. This plant has an extremely wide distribution in the northern hemisphere of the old world, occurring mostly in saltish soils. It is found in the salt marshes of the British Islands, on the coasts of the Baltic, of France and the Mediterranean, and on saline soils in Hungary and Podolia; thence it extends eastward, covering immense tracts in Southern Russia, the regions of the Caspian, and Central Siberia, to Chinese Mongolia.

The particular variety which furnishes at least the chief part of the drug, is a low, shrubby, aromatic plant, distinguished by its very small, erect, ovoid flowerheads, having oblong, obtuse, involucral scales, the interior scales being scarious. The stem in its upper half is a fastigiate, thyrsoid panicle, crowned with flowerheads. The localities for the plant are the neighbourhood of the Don, the regions of the lower Volga near Sarepta and Zaritzyn, and the Kirghiz deserts.

The drug, which consists of the minute, unopened flowerheads, is collected in large quantities, as we are informed by Björklund (1867), on the vast plains or steppes of the Kirghiz, in the northern part of Turkestan. It was formerly gathered about Sarepta, a German colony in the Government of Saratov, but from direct information we have (1872) received, it appears to be obtained there no longer.

The emporium for wormseed is the great fair of Nishnei-Novgorod (July 15th to Aug. 27th), whence the drug is conveyed to Moscow, St. Petersburg, and Western Europe.

Wormseed is found in the Indian bazaars. A specimen received by us from Bombay does not materially differ in form from the Russian drug, but is slightly shaggy and mixed with tomentose stalks. It is probably brought from Afghanistan and Cabul.

Wilkomm has described, as mother plant of wormseed, an Artemisia which he calls A. Cina. It was obtained in Turkestan by Prof. Petzholdt, who received it from the people gathering the drug. The specimen kindly communicated to us by Prof. Willkomm has flowerheads which do not entirely resemble the wormseed of trade, in that they have fewer scales, but their number may be somewhat varying.

History—Several species of Absinthium are mentioned by Dioscorides, one of which called Ἀψίνθιον Θαλάσσιον or Σέριϕον, having very small seeds (capitules), and growing in Cappadocia, he states to be taken in honey as a remedy for ascarides and lumbrici: one can hardly doubt but that this is the modern wormseed. Another species is described by the same author as being called Σαντόνιον, from its growing in the country of the Santones in Gaul (the modern Saintonge); he asserts it to resemble σέριϕον in its properties.

In an epistle on intestinal worms attributed to Alexander Trallianus, who practised medicine with great success at Rome in the 6th century, the use is recommended of a decoction of Absinthium marinum (θαλασσία ἀψίνθη) as a cure for ascarides and round worms.

Semen sanctum vel Alexandrinum is mentioned as a vermifuge for children by Saladinus about a.d. 1450, and by Ruellius, Dodonæus, the Bauhins, and other naturalists of the 16th century. Tragus mentions that it is imported by way of Genoa. Its ancient reputation has been fully maintained in modern times, and in the form partly of Santonin, the drug is still extensively employed.

Description—Good samples of the drug consist almost exclusively of entire, unopened flowerheads or capitules, which are so minute that it requires about 90 to make up the weight of one grain. In samples less pure, there is an admixture of stalks, and portions of a small pinnate leaf. The flowerheads are of an elliptic or oblong form, about ⅒ of an inch long, greenish yellow when new, brown if long kept; they grow singly, less frequently in pairs, on short stalks, and are formed of about 18 oblong, obtuse, concave scales, closely imbricated. This involucre is much narrowed at the base in consequence of the lowermost scales being considerably shorter than the rest. The capitule is sometimes associated with a few of the upper leaves of the stem, which are short, narrow, and simple. Notwithstanding its compactness, the capitule is somewhat ridged and angular, from the involuclar scales having a strong, central nerve or keel. The middle portion of each scale is covered with minute, yellow, sessile glands, which are wanting on the transparent scarious edge. The latter is marked with extremely fine striæ and is quite glabrous; in the young state the keel bears a few woolly colourless hairs, but at maturity the whole flowerhead is shining and nearly glabrous. The florets number from 3 to 5; they have (in the bud) an ovoid corolla, glandular in its lower portion, a little longer than the ovary, which is destitude of pappus.

Wormseed when rubbed in the hand exhales a powerful and agreeable odour, resembling cajuput oil and camphor; it has a bitter aromatic taste.

Chemical Composition—Wormseed yields from 1 to 2 per cent. of essential oil, having its characteristic smell and taste. The oil is slightly levogyrate and chiefly consists of the liquid C₁₀H₁₈O, accompanied by a small amount of hydrocarbon. The former has the odour of the drug, yet rather more agreeable; sp. gr. 0·913 at 20° C. It boils without decomposition at 173°-174°, but in presence of P₂O₅ or P₂S₅ abundantly yields cymol (see p. 333). The latter had alreadybeen observed by Völckel (1854) under the name of cinene or cynene, yet he assigned to it the formula C₁₂H₉; Hirzel (1854) called it cinæbene.

The water which distills over carries with it volatile acids of the fatty series, also angelic acid (see pp. , ).

The substance to which the remarkable action of wormseed on the human body is due is Santonin, C₁₅H₁₈O₃. It was discovered in 1830 by Kahler, an apothecary of Düsseldorf, who gave a very brief notice of it in the Archiv der Pharmacie of Brandes (xxxiv. 318). Immediately afterwards Augustus Alms, a druggist’s assistant at Penzlin in the grand duchy of Mecklenburg-Schwerin, knowing nothing of Kahler’s discovery, obtained the same substance and named it Santonin. Alms recommended it to the medical profession, pointing out that it is the anthelminthic principle of wormseed. Santonin constitutes from 1½ to 2 per cent. of the drug, but appears to diminish in quantity very considerably as the flowers open. It is easily extracted by milk of lime, for, though not an acid and but sparingly soluble in water even at a boiling heat, it is capable of combining with bases. With lime it forms then santoninate of calcium, which is readily soluble in water. On addition of hydrochloric acid, santoninic acid, C₁₅H₂₀O₄, separates, but parts with OH₂, santonin being thus immediately reproduced. Similar facts have been recorded with regard to alantic acid (see p. 381).

Santonin forms crystals of the orthorhombic system, melting at 170°, which are inodorous, but have a bitter taste, especially when dissolved in chloroform or alcohol. They are colourless, but when exposed to daylight, or to the blue or violet rays, but not to the other colours of the spectrum, they assume a yellow hue, and split into irregular fragments. This change, which takes place even under water, alcohol or ether, is not accompanied by any chemical alteration. This behaviour of santonin when exposed to light, resembles that of erythrocentaurin, C₂₇H₂₄O₈. The latter has been obtained by means of ether, from the alcoholic extract of Erythræa Centaurium, and of some other Gentianaceæ. Méhu (1866) has shown that the colourless crystals of that substance when exposed to sunlight, assume a brilliant red colour, without undergoing any chemical alteration. The colourless solutions of this body in chloroform or alcohol yield the original substance. Yet as to santonin, Sestini and Cannizzaro (1876) have shown, that its dilute alcoholic solution, on long exposure to sunlight, affords a compound ether of photosantonic acid, namely C₁₅H₁₃O₄(C₂H₅)₂.

Wormseed contains, in addition to the above described bodies, resin, sugar, waxy fat, salts of calcium and potassium, and malic acid; when carefully selected and dried, it yielded us 6·5 per cent. of ash, rich in silica.

Commerce—Ludwig of St. Petersburg has stated that the imports of wormseed into that city were about as follows:—In 1862, 7400 cwt.; in 1863, 10,500 cwt.; in 1864, 11,400 cwt. The drug was brought from the Kirghiz steppes by Semipalatinsk and by Orenburg.

Uses—The drug is employed exclusively for its anthelminthic properties, partly in the form of santonin. It proves of special efficacy for the dislodgement of Ascaris lumbricoides.

Radix Arnicæ.

Rhizoma Arnicæ, Arnica Root; F. Racine d’Arnica; G. Arnicawurzel.

Botanical Origin—Arnica montana L., a perennial plant growing in meadows throughout the northern and central regions of the northern hemisphere, but not reaching the British Islands. In western and central Europe it is an inhabitant of the mountains, but in colder countries it grows in the plains.

In high latitudes, as in Arctic Asia and America, a peculiar form of the plant distinguished by narrow, almost linear leaves has been named A. angustifolia Vahl; but numerous transitional forms prove its identity with the ordinary A. montana of Europe.

History—The older botanists as Matthiolus, Gesner, Camerarius, Tabernæmontanus, and Clusius were acquainted with Arnica and had some knowledge of its medicinal powers, which appear to have been expressly recommended, towards the end of the 16th century, by Franz Joël, professor of Greifswald, Germany. All parts of the plant were no doubt popular remedies in Germany at an early period, but Arnica was only introduced into regular medicine on the recommendation of Johann Michael Fehr of Schweinfurt and of several other physicians. But for enthusiastic laudation of the new remedy, all these writers fall far short of Collin of Vienna, who imagined that in Arnica he had found a European plant possessing all the virtues of Peruvian Bark. In his hands fevers and agues gave way under its use, and more than 1000 patients in the Pazman Hospital were alleged to have been cured of intermittents by an electuary of the flowers, between 1771 and 1774. Such happy results were not obtained by other physicians.

Arnica (herba, flos, radix) had a place in the London Pharmacopœia of 1788, but it soon fell out of notice, so that Woodville writing in 1790, remarks that he had been unable to procure the plant from any of the London druggists. Of late years it has gained some popular notoriety as an application in the form of tincture, for preventing the blackness of bruises, but in England it is rarely prescribed internally.

Description—The arnic root of pharmacy consists of a slender, contorted, dark brown rootstock, an inch or two long, emitting from its under side an abundance of wiry simple roots, 3, 4 or more inches in length; it usually bears the remains of the rosette of characteristic, ovate, coriaceous leaves, which are 3-to 5-nerved, ciliated at the margin, and slightly pubescent on their upper surface. It has a faintly aromatic, herby smell, and a rather acrid taste.

Microscopic Structure—On a transverse section, the rootstock exhibits a large pith surrounded by a strong woody ring. In the innermost part of the cortical layer, large oil-ducts are found corresponding to the fibro-vascular bundles. Neither starch granules, inulin, or oxalate of calcium are visible in the tissue. The rootlets are of a different structural character, but also contain oil-ducts.

Chemical Composition—Several chemists have occupied themselves in endeavouring to isolate the active principle of arnica. Bastick described (1851) a substance which he obtained in minute quantity from the flowers and named Arnicine. He states it to possess alkaline properties, to be non-volatile, slightly soluble in water, more so in alcohol or ether; when neutralized with hydrochloric acid, it forms a crystalline salt.

The Arnicin extracted by Walz (1861) both from the root and flowers of arnica is a different substance; it is an amorphous yellow mass of acrid taste, slightly soluble in water, freely in alcohol or ether, and dissolving also in alkaline solutions. It is precipitable from its alcoholic solution by tannic acid or by water. Walz assigns to arnicin the formula C₂₀H₃₀O₄; other chemists that of C₃₅H₅₄O₇. Arnicin has not yet been proved a glucoside, although it is decomposed by dilute acids.

Sigel (1873) obtained from dried arnica root about ½ per cent. of essential oil, and 1 per cent. from the fresh; the oil of the latter had a sp. gr. of 0·999 at 18° C. The oil was found to be a mixture of various bodies, the principle being dimethylic ether of thymohydroquinone

C₁₀H₁₂ OCH₃

OCH₃,

boiling at about 235°.

The water from which the oil separates contains isobutyric acid, probably also a little angelic and formic acid; but neither capronic nor caprylic acid, which had been pointed out by Walz.

Arnica root contains inulin, which Dragendorff extracted from it to the extent of about 10 per cent.

Uses—Arnica is used chiefly in the form of tincture as a popular application to bruises and chilblains; internally it is occasionally prescribed as a stimulant and diaphoretic.

Adulteration—Arnica root has been met with adulterated with the root of Geum urbanum L., a common herbaceous plant of the order Rosaceæ. The latter is thicker than the rhizome of arnica, being ³/₁₀ to ⁴/₁₀ of an inch in diameter; it is a true root, furnished on all sides with rootlets, and has an astringent taste. The leaves of Geum are pinnate and quite unlike those of arnica.

Flores Arnicæ.

Botanical Origin—See preceding article.

History—The flowers probably in the first line attracted the attention of popular medicine in Germany, as we pointed out, page 390.

Description—Arnica montana produces large, handsome, orange-yellow flowers, solitary at the summit of the stem or branches. The involucral scales of the capitulum (20 to 24) are of equal length, but are imbricated, forming a double row. They are very hairy, the shorter hairs being tipped with viscid glands. The receptacle is chaffy, ¼ of an inch in diameter, with about 20 ligulate florets, and of tubular a much larger number. The ligulate florets, an inch in length, are oblong, toothed at the apex, and traversed by about 10 parallel veins. The achenes are brown and hairy, crowned by pappus consisting of a single row of whitish barbed hairs.

The receptacle is usually inhabited by a fly, Trypeta arnicivora Löw; the Pharmacopœia Germania (1872) therefore ordered the florets to be deprived of the involucre and receptacle—“flosculi a peranthodio liberati.” From a chemical point of view the usefulness of this direction may be doubted.

Arnica flowers have a weak, not unpleasant odour; they were formerly used in making the tincture, but as the British Pharmacopœia now directs that preparation to be made with the root, they have almost gone out of use in Great Britain.

Chemical Composition—The flowers appear to be rather richer in arnicin than the root, and are said to be equal if not superior to it in medicinal powers; yet the essential oil they contain is not the same. It is obtained in but extremely small amount and has a greenish or blue coloration. Hesse (1864) has proved that the flowers are devoid of a peculiar volatile alkaloid which had been supposed to be present in them.

Radix Taraxaci.

Dandelion Root, Taraxacum Root; F. Pissenlit; G. Löwenzahnwurzel.

Botanical Origin—Taraxacum officinale Wiggers T. Dens-leonis Desf., Leontodon Taraxacum L., a plant of the northern hemisphere, found over the whole of Europe, Central and Northern Asia, and North America, extending to the Arctic regions. It varies under a considerable number of forms, several of which have been regarded as distinct species. In many districts it is a troublesome weed.

History—Though the common Dandelion is a plant which must have been well known to the ancients, no indubitable reference to it can be traced in the classical authors of Greece and Italy; it is thought that ἀθάκη of Theophrast and others means it. The word Taraxacum is however usually regarded as of Greek origin; we have first met with as Tarakhshagun in the works of the Arabian physicians, who speak of it as a sort of Wild Endive. It is thus mentioned by Rhazes in the 10th, and by Avicenna in the 11th century.

The name Dens Leonis, an equivalent of which is found in nearly all the languages of Europe, is stated in the herbal of Johann von Cube to have been bestowed on this plant by one Wilhelm, a surgeon, who held it in great esteem; but of this personage and of the period during which he lived we have sought information in vain, and we may remember that Dens Leonis (“Dant y Llew”) is already met with in the Welsh medicine of the 13th century.

Dandelion was also much valued as medicine in the time of Gerarde and Parkinson, and is still extensively employed.

Collection—In England, taraxacum root is considered to be in perfection for extract in the month of November, the juice at that period affording an ampler and better product than at any other. Bentley contends that it is more bitter in March, and most of all in July, and that at the former period at least it should be preferred.

Description—The root is perennial, and tapering, simple, or slightly branched, attaining in a good soil a length of a foot or more, and half an inch to an inch in diameter. Old roots divide at the crown into several heads. The root is fleshy and brittle; externally of a pale brown, internally white, and abounding in an inodorous milky juice of bitter taste. It shrinks very much in drying, losing in weight about 76 per cent.

Dried dandelion root is half an inch or less in thickness, dark brown, shrivelled with wrinkles running lengthwise often in a spiral direction; when quite dry, it breaks easily with a short corky fracture, showing a very thick white bark, surrounding a woody column. The latter is yellowish, very porous, without pith or rays. A rather broad but indistinct cambium-zone separates the wood from the bark, which latter exhibits numerous well-defined concentric layers. The root has a bitterish taste.

Microscopic Structure—On the longitudinal section, especially in a tangential direction, the brownish zones are seen to contain laticiferous vessels, only about 2 mkm. in diameter. These traverse their zones in a vertical direction, giving off numerous lateral branches, which however remain always confined to their zone. Within each of these zones, the lacticiferous vessels form consequently an anastomosing net. We may say that the root is thus vertically traversed by about 10 to 20 concentric rings of lacticiferous vessels. They may be made beautifully evident by means of anilin-blue, with which a thin longitudinal section of the fresh root may be moistened. The root must be allowed to partially dry, but only till the milky juice coagulates; the thin slice then energetically absorbs the colouring matter.

The tissue of the dried root is loaded with inulin, which does not occur in the solid form in the living plant. The woody part of taraxacum root is made up of large scalariform vessels accompanied by parenchymatous tissue, the former much prevailing.

Chemical Composition—The fresh milky juice of dandelion is bitter and neutral, but it soon acquires an acid reaction and reddish brown tint, at the same time coagulating with separation of masses of what has been called by Kromayer (1861), Leontodonium. This chemist, by treating this substance with hot water, obtained a bitter solution yielding an active (?) principle to animal charcoal, from which it was removed by means of boiling spirit of wine. After the evaporation of the alcohol, Kromayer purified the liquid by addition of basic acetate of lead, saturation of the filtered solution with sulphuretted hydrogen and evaporation to dryness. The residue then yielded to ether an acrid resin, and left a colourless amorphous mass of intensely bitter taste, named by Kromayer Taraxacin. Polex (1839) obtained apparently the same principle in warty crystals; he simply boiled the milky juice with water and allowed the concentrated decoction to evaporate.

The portion of the “Leontodonium,” not dissolved by water, yields to alcohol a crystalline substance, Kromayer’s Taraxacerin, C₈H₁₆O. It resembles lactucerin and has in alcoholic solution an acrid taste. How far the medicinal value of dandelion is dependent on the substances thus extracted, is not yet known.

Dragendorff (1870) obtained from the root gathered near Dorpat in October and dried at 100° C., 24 per cent. of Inulin and some sugar. The root collected in March from the same place yielded only 1·74 per cent. of inulin, 17 of uncrystallizable sugar and 18·7 of Levulin. The last named substance, discovered by Dragendorff, has the same composition as inulin, but dissolves in cold water; the solution tastes sweetish, and is devoid of any rotatory power. Inulin is often to be seen as a glistening powder when extract of taraxacum is dissolved in water.

T. and H. Smith of Edinburgh (1849) have shown that the juice of the root by a short exposure to the air undergoes a sort of fermentation which results in the abundant formation of Mannite, not a trace of which is obtainable from the perfectly fresh root. Sugar which readily underwent the vinous fermentation was found by the same chemists in considerable quantity.

The leaves and stalks of dandelion (but not the roots) were found by Marmé (1864) to afford the Inosite, C₆H₁₂O + 2 OH.

The root collected in the meadows near Bern immediately before flowering, carefully washed and dried at 100° C., yielded us 5·24 per cent. of ash, which we found to consist of carbonates, phosphates, sulphates, and in smaller quantity also of chlorides.

Uses—Taraxacum is much employed as a mild laxative and tonic, especially in hepatic disorders.

Adulteration—The roots of Leontodon hispidus L. (Common Hawkbit) have occasionally been supplied by fraudulent herb-gatherers in place of dandelion. Both plants have runcinate leaves, but those of hawkbit are hairy, while those of dandelion are smooth. The (fresh) root of the former is tough, breaking with difficulty and rarely exuding any milky juice.

The dried root of dandelion is exceedingly liable to the attacks of maggots, and should not be kept beyond one season.

Herba Lactucæ Virosæ.

Prickly Lettuce; F. Laitue vireuse; G. Giftlattich.

Botanical Origin—Lactuca virosa L., a tall herb occurring on stony ground, banks and roadsides, throughout Western, Central and Southern Europe. It is abundant in the Spanish Peninsula and in France, but in Britain is only thinly scattered, reaching its northern limit in the south-eastern Highlands of Scotland.

History—The introduction of this lettuce into modern medicine is due to Collin (the celebrated physician of Vienna, mentioned in our article on Rad. Arnicæ, p. 390), who about the year 1771 recommended the inspissated juice in the treatment of dropsy. In long standing cases, this extract was given to the extent of half an ounce a day.

The College of Physicians of Edinburgh inserted Lactuca virosa L. in their pharmacopœia of 1792, while in England its place was taken by the Garden Lettuce, L. sativa L. The Authors of the British Pharmacopœia of 1867 have discarded the latter, and directed that Extractum Lactucæ shall be prepared by inspissating the juice of L. virosa.

Description—The plant is biennial, producing in its first year depressed obovate undivided leaves, and in its second a solitary upright stem, 3 to 5 feet high, bearing a pinacle of small, pale yellow flowers, resembling those of the Garden Lettuce. The stem, which is cylindrical and a little prickly below, has scattered leaves growing horizontally; they are of a glaucous green, ovate-oblong, often somewhat lobed, auricled, clasping, with the margin provided with irregular spinescent teeth, and midrib white and prickly. The whole plant abounds in a bitter, milky juice of strong, unpleasant, opiate smell.

Chemical Composition—We are not aware of any modern chemical examination having been made of Lactuca virosa. The more important constituents of the plant are those found in Lactucarium, to the article on which the reader is referred.

Uses—The inspissated expressed juice of the fresh plant is reputed narcotic and diuretic, but is probably nearly inert.

Lactucarium.

Lactucarium, Lettuce Opium, Thridace; F. and G. Lactucarium.

Botanical Origin—The species of Lactuca from which lactucarium is obtained, are three or four in number, namely—

1. Lactuca virosa L., described in the foregoing article.

2. L. Scariola L., a plant very nearly allied to the preceding and perhaps a variety of it, but having the foliage less abundant, more glaucous, leaves more sharply lobed, much more erect and almost parallel with the stem. It has the same geographical range as L. virosa.

3. L. altissima Bieb., a native of the Caucasus, now cultivated in Auvergne in France for yielding lactucarium. It is a gigantic herb, having when cultivated a height of 9 feet and a stem 1½ inches in diameter. Prof. G. Planchon believes it to be a mere variety of L. Scariola L.

4. L. sativa L., the common Garden Lettuce.

History—Dr. Coxe of Philadelphia was the first to suggest that the juice of the lettuce, collected in the same manner as opium is collected from the poppy, might be usefully employed in medicine. The result of his experiments on the juice which he thus obtained from the garden lettuce (L. sativa L.), and called Lettuce Opium, was published in 1799.

The experiments of Coxe were continued some years later by Duncan, Young, Anderson, Scudamore and others in Scotland, and by Bidault de Villiers and numerous observers in France. The production of lactucarium in Auvergne was commenced by Aubergier, pharmacien of Clermont-Ferrand, about 1841.

Secretion—All the green parts of the plant are traversed by a system of vessels, which when wounded, especially during the period of flowering, instantly exude a white milky juice. The stem, at first solid and fleshy but subsequently hollow, owes its rigidity to a circle of about 30 fibro-vascular bundles, each of which includes a cylinder of cambium. At the boundary between this tissue and the primary cortical parenchyme, is situated the system of milk-vessels, exhibiting on transverse section a single or double circle of thin-walled tubes, the cavities of which contain dark brown masses of coagulated juice. In longitudinal section, they appear branched and transversely bound together, as in the milk-vessels of taraxacum. The larger of these tubes, 35 mkm. in diameter, correspond pretty regularly in position with the vascular bundles. Each of the latter is also separated from the pith by a band or arch of cambium, in the circumference of which isolated smaller milk-vessels occur.

The system of milk-vessels is therefore double, belonging to the pith on the one side, and to the bark on the other, the two being separated by juiceless wood. The milk vessels of the bark are covered by only 2 to 6 rows of parenchyme-cells of the middle bark, rapidly decreasing in size from within outwards, and these are protected by a not very thick-walled epidermis. Hence it is easy to understand how the slightest puncture or incision may reach the very richest milk-cells.

The drops of milky juice, when exposed to the air, quickly harden to small yellowish-brown masses, whitish within.

Collection and Description—Lactucarium has been especially collected since about the year 1845, in the neighbourhood of the small town of Zell on the Mosel between Coblenz and Trèves in Rhenish Prussia. The introduction of this industry is due to Mr. Goeris, apothecary of that place, to whom we are indebted for the following information, and for some further particulars, to Mr. Meurer of Zell.

The plant is grown in gardens, where it produces a stem only in its second year. In May just before it flowers, its stem is cut off at about a foot below the top, after which a transverse slice is taken off daily until September. The juice, which is pure white but readily becomes brown on the surface, is collected from the wounded top by the finger, and transferred to hemispherical earthen cups, in which it quickly hardens so that it can be turned out. It is then dried in the sunshine until it can be cut into four pieces, when the drying is completed by exposure to the air for some weeks on frames.

At Zell, 300 to 400 kilogrammes (661 to 882 lb.) of lactucarium are annually produced; the whole district furnishes at best but 20 quintals annually. The price the drug fetches on the spot varies from 4 to 10 thalers per kilogramme (about 6s. to 14s. per lb.) In the Eifel district, where lactucarium was formerly collected, none is now produced.

As found in trade, German lactucarium consists of angular pieces formed as already described, but rendered more or less shrunken and irregular by loss of moisture and by fracture. Externally they are of a dull reddish-brown, internally opaque and wax-like, and when recent, of a creamy white. By exposure to the air, this white becomes yellow and then brown. Lactucarium has a strong unpleasant odour, suggestive of opium, and a very bitter taste.

The lactucarium produced by Aubergier of Clermont-Ferrand is of excellent quality, but does not appear to differ from that obtained on the Mosel, except that it is in circular cakes about 1½ inches in diameter, instead of in angular lumps.

Scotch lactucarium, which was formerly the only sort found in the market, is still (1872) met with. Mr. Fairgrieve, who produces it in the neighbourhood of Edinburgh, collects the juice into little tin vessels, in which it quickly thickens; it is then turned out and dried with a gentle heat, the drug being broken up as the process of drying goes on. It is thus obtained in irregular earthy-looking lumps of a deep brown hue, of which the larger may be about an inch in length. In smell, it exactly resembles the drug collected on the Continent.

We have also before us Austrian lactucarium, prepared at Waidhofen on the Thaya, where about 35 kilogrammes are annually produced. It is in fine tears of vigorous smell.

We are unacquainted with Russian lactucarium, which has been quoted at a very high price in some continental lists.

Chemical Composition—Lactucarium is a mixture of very different organic substances, together with 8 to 10 per cent. of inorganic matter. It is not completely taken up by any solvent, and when heated merely softens but does not melt. Nearly half the weight of lactucarium consists of a substance called Lactucerin or Lactucon, which in our opinion is closely allied to if not identical with similar substances occurring in numerous milky juices. Lactucerin as afforded by the drug under examination is probably a mixture of several bodies. It may be obtained by exhausting lactucarium with boiling alcohol sp. gr. 0·830; it is deposited in crystals, which when duly purified have the form of slender colourless, microscopic needles. Lactucerin is an inodorous, tasteless substance, insoluble in water, but dissolving in ether and in oils both fixed and volatile, not quite so readily either in benzol, or in bisulphide of carbon. We found it to melt at 232° C. and to agree with the formula C₁₉H₃₀O; Franchimont (1879) assigns to it the formula C₁₄H₂₄O, melting point 296°.

Euphorbon (see Euphorbium), echicerin (see Cortex Alstoniæ), taraxacerin (p. 394), the cynanchol, C₁₅H₂₄O, extracted in 1875 by Buttleroff from Cynanchum acutum L., are remarkably analogous to lactucerin.

In the lactucarium of Zell, we further met with a large amount of a substance which is readily soluble in bisulphide of carbon. It is an amorphous mass, melting below 100°, separating from alcohol as a syrupy mass.

Cold alcohol, as well as boiling water, takes out of lactucarium about 0·3 per cent. of a crystallizable bitter substance, Lactucin, C₁₁H₁₂O₃H₂O, which although it reduces alkaline cupric tartrate, is not a glucoside. It may be best obtained by means of dialyse. Lactucin forms white pearly scales, readily soluble in acetic acid, but insoluble in ether. It loses its bitterness when treated with an alkali.

From the mother-liquors that have yielded lactucin, Ludwig, in 1847, obtained Lactucic Acid, as an amorphous light yellow mass, becoming crystalline after long standing. Lastly lactucarium has further afforded in small quantity an amorphous substance named Lactucopicrin, C₄₄H₆₄O₂₁, apparently produced from lactucin by oxidation; it is stated by Kromayer (1862) to be soluble in water or alcohol, and to be very bitter.

Of the widely diffused constituents of plants, lactucarium contains caoutchouc (40-50 per cent.), gum, oxalic, citric, malic and succinic acids, sugar, mannite, and asparagin, together with potassium, calcium and magnesium salts of nitric and phosphoric acids. We obtained crystals of nitrate of potassium by concentrating the aqueous decoction of lactucarium. On distillation with water, a volatile oil having the odour of lactucarium passes over in very small quantity.

Uses—The soporific powers universally ascribed in ancient times to the lettuce are supposed to exist in a concentrated form in lactucarium. Yet numerous experiments have failed to show that this substance possesses more than very slight sedative properties, if indeed it is not absolutely inert.

Lobeliaceæ.

Herba Lobeliæ.

Lobelia, Indian Tobacco; F. Lobelie enflée; G. Lobeliakraut.

Botanical Origin—Lobelia inflata L., an annual herb, 9 to 18 inches high, with an angular upright stem, simple or more frequently branching near the top, widely diffused throughout the eastern part of North America from Canada to the Mississippi, growing in neglected fields, along roadsides, and on the edges of woods, and thriving well in European gardens.

History—Lobelia inflata was described and figured by Linnæus from specimens cultivated by him at Upsala about 1741, but he does not attribute to the plant any medicinal virtues.

The aborigines of North America made use of the herb, which from this circumstance and its acrid taste, came to be called Indian Tobacco. In Europe it was noticed by Schöpf, but with little appreciation of its powers. In America it has long been in the hands of quack doctors, but its value in asthma was set forth by Cutler in 1813. It was not employed in England until about 1829, when, with several other remedies, it was introduced to the medical profession by Reece.

Description—The leaves are 1 to 3 inches long, scattered, sessile, ovate-lanceolate, rather acute, obscurely toothed, somewhat pubescent. The edge of the leaf bears small whitish glands, and between them isolated hairs which are more frequent on the under than on the upper surface. They are usually in greater abundance on the lower and middle portions of the stem.

The stem of the growing plant exudes when wounded a small quantity of acrid milky juice, contained in laticiferous vessels running also into the leaves. The inconspicuous blossoms are arranged in a many-flowered, terminal, leafy raceme. The five-cleft, bilabiate corolla is bluish with a yellow spot on the under lip, its tube being as long as the somewhat divergent limb of the calyx.

The capsule is ovoid, inflated, ten-ribbed, crowned by five elongated sepals which are half as long as the ripe fruit. The latter is two-celled, and contains a large number of ovate-oblong seeds about ¹/₅₀ of an inch in length, having a reticulated, pitted surface.

The herb found in commerce is in the form of rectangular cakes, 1 to 1¾ inches thick, consisting of the yellowish-green chopped herb, compressed as it would seem while still moist, and afterwards neatly trimmed. The cakes arrive wrapped in paper, sealed up and bearing the label of some American druggist or herb-grower.

Lobelia has a herby smell and, after being chewed, a burning acrid taste resembling that of tobacco.

Chemical Composition—Lobelia has been examined by Procter, Pereira (1842), Reinsch (1843), Bastick (1851), also by F. F. Mayer. The first-named chemist traced the activity of the plant to an alkaloid which he termed Lobelina, and his observations were confirmed by the independent experiments of Bastick. Lewis (1878) obtained it by mixing the drug with charcoal and exhausting the powder with water containing a little acetic acid. The liquid is cautiously evaporated to the consistency of an extract and triturated with magnesia, from the excess of which the aqueous solution of lobeline is separated by filtration. It is agitated with amylic alcohol (or ether), which by spontaneous evaporation affords the alkaloid. The latter is again dissolved in water and filtered through animal charcoal; from the dried powder lobeline is to be removed by ether.

Lobeline is an oily, yellowish fluid with a strong alkaline reaction, especially when in solution. In the pure state it smells slightly of the plant, but more strongly when mixed with ammonia. Its taste is pungent and tobacco-like, and when taken in minute doses, it exercises in a potent manner the poisonous action of the drug. Lobeline is to some extent volatile, but its decomposition begins when it is heated to 100° C. either pure or in presence of dilute acids or caustic alkalis. Lobeline dissolves in water, but more readily in alcohol or ether, the latter of which is capable of removing it from its aqueous solution. It neutralizes acids, forming with some of them crystallizable salts, soluble in water or alcohol.

The herb likewise contains traces of essential oil (the Lobelianin of Pereira?), resin and gum. The seeds afforded Procter about 30 per cent. of fixed oil, sp. gr. 0·940, which was found to dry very rapidly. The Lobeliin of Reinsch appears to be an indefinite compound.

In 1871 Enders at our request performed some researches on Lobelia in order to isolate the acrid substance to which the herb owes its taste. He exhausted the drug with spirit of wine and distilled the liquid in presence of charcoal, which then retained the acrid principle. The charcoal was washed with water, and then treated with boiling alcohol. This on evaporation yielded a green extract, which was further purified by means of chloroform. Warty tufts were thus finally obtained, yet always of a brownish colour. The tufts are readily soluble in ether and chloroform, but only slightly in water; they possess the acrid taste of lobelia. This substance, which we may term Lobelacrin, is decomposed if merely boiled with water; by the influence of alkalis or acids it is resolved into sugar and Lobelic Acid. The latter is soluble in ether, water, and alcohol, and is non-volatile; it yields a soluble salt with baryum oxide, whereas its plumbic salt is insoluble in water.

Lewis suggests that lobelacrin is nothing else than lobeliate of lobeline, which he believes to exist ready formed in the plant. From a decoction of the drug, on addition of sulphate of copper, lobeliate of copper is precipitated. By decomposing the latter with sulphuretted hydrogen, concentrating the solution and shaking it with warm ether, Lewis obtained a yellow solution affording on evaporation a crystalline mass of lobelic acid.

Uses—Lobelia is a powerful nauseating emetic; in large doses an acro-narcotic poison. It is prescribed in spasmodic asthma.

Ericaceæ.

Folia Uvæ Ursi.

Bearberry Leaves; F. Feuilles de Busserole; G. Bärentraubenblätter.

Botanical Origin—Arctostaphylos Uva-ursi Sprengel (A. officinalis Wimmer et Grabowsky, Arbutus Uva-ursi L.), a small, procumbent, evergreen shrub, distributed over the greater part of the northern hemisphere. It occurs in North America, Iceland, Northern Europe, and Russian Asia, and on the chief mountain chains of Central and Southern Europe. In Britain it is confined to Scotland, the north of England, and Ireland.

History—The bearberry was used in the 13th century by the Welsh “Physicians of Myddfai,” described by Clusius in 1601, and recommended for medicinal use in 1763 by Gerhard of Berlin and others. It had a place in the London Pharmacopœia for the first time in 1788.