← Electricity for Boys

INDEXToC

A

  • Accumulated, 31.
  • Accumulation, 29.
  • Accumulator cell, 87.
  • Accumulators, 82, 88, 89.
  • Accumulators, plates, 83.
  • Acid, 34, 37, 125.
  • Acid maker, 125.
  • Acid, sulphuric, 31, 84.
  • Acidulated, 55.
  • Acidulated water, 34.
  • Acoustics, 110.
  • Actinic rays, 184, 185.
  • Actinium, 186.
  • Active element, 82.
  • Adjustable rod, 107.
  • Adjusting screw, 70, 71, 72, 73, 106.
  • Aerial wire, 108.
  • Agents, 13, 32.
  • Alarms, burglar, 11, 76, 80.
  • Alkali, 125.
  • Alkaline, 37.
  • Alternate, 127.
  • Alternating, 38, 149, 150, 153, 154, 155, 156.
  • Alternating current, 145.
  • Alternating periods, 149.
  • Alternations, 147.
  • Aluminum, 128, 129, 135, 137.
  • Aluminum hydrate, 129.
  • Amber, 5, 171.
  • Ammeter, 7, 88.
  • Amperage, 38, 61, 62, 132, 159, 160, 168.
  • Ampere, 7, 37, 60, 63, 139, 140, 167.
  • Amplitude, 111.
  • Annunciator, 65, 74, 76, 79, 80, 81.
  • Annunciator bells, 11.
  • Anode, 35, 133, 134.
  • Antennæ, 108.
  • Antimony 137, 143.
  • Anvil, 13, 14.
  • Apparatus, 11, 57, 106, 139, 145.
  • Arc, 163, 182.
  • Arc lighting, 38, 165.
  • Arc system, 166.
  • Armature, 18, 25, 38, 40, 42, 43, 45, 46, 47, 48, 53, 55, 70, 72, 73, 74, 90, 93, 112, 151, 152, 155, 163, 176, 177, 178, 179, 180.
  • Armature brush, 48.
  • Armature post, 71.
  • Armature, vertical, 75.
  • Armature winding, 42, 43, 156.
  • Asbestos, 140.
  • Astatic galvanometer, 108.
  • Atmosphere, 184.
  • Attract, 30.
  • Attracted, 72.
  • Attraction, 21, 25.
  • Attractive, 178.
  • Automatic, 120.
  • Auxiliary, 44.
  • Awls, 14.

B

  • Bacteria, 126, 187.
  • Bar, cross, 66.
  • Bar, horizontal, 46.
  • Bar, parallel switch, 67.
  • Bar, switch, 65, 68.
  • Base block, 66.
  • Batteries, 11, 93, 122.
  • Battery, 29, 30, 32, 35, 36, 46, 47, 80, 81, 82, 83, 85, 86, 88, 92, 94, 95, 107, 108, 116, 117, 118, 121, 134, 142.
  • Battery charging, 82.
  • Bearings, 45, 46.
  • Bells, 65, 73, 76, 122.
  • Bells, electric, 70.
  • Bench, 13, 15, 17.
  • Binding post, 52, 70, 71, 72, 103, 107, 108, 121.
  • Binding screw, 65, 66.
  • Bismuth, 18, 143.
  • Bit, 13.
  • Blue vitriol, 57.
  • Brass plate, 77, 78.
  • Brazing, 17, 65.
  • Bridge, 52.
  • Brush holder, 46.
  • Brushes, 48, 150, 151, 153, 167.
  • Burglar, 11.
  • Burglar alarm, 76, 80.
  • Buttons, contact, 80.
  • Buttons, push, 65, 68, 69, 70, 76, 79.

C

  • Calorimeter, 56.
  • Cancerous, 187.
  • Candle power, 89, 139.
  • Cap, removable, 73.
  • Cap screws, 42.
  • Carbon, 35, 119, 121, 162, 163, 169.
  • Carbon block, 120.
  • Carbon pencil, 119.
  • Cathode, 35, 36, 133, 134.
  • Cell, 29, 33.
  • Cell, accumulator, 87.
  • Cell, charging, 87.
  • Channel, 43.
  • Channel, concave, 40.
  • Charged, 120.
  • Charged battery, 82.
  • Charging circuit, 82, 89.
  • Charging source, 83.
  • Charged wire, 147.
  • Chemical, 57.
  • Chisels, 13.
  • Chloride of lime, 84.
  • Choked, 157.
  • Choking coils, 145, 146, 156, 158.
  • Circuit, 33, 69, 73, 76, 78, 80, 81, 90, 92, 93, 109, 113, 116, 121, 122, 131, 134, 143, 156.
  • Circuit, primary, 99.
  • Circuit, secondary, 99.
  • Circuiting, 81, 155.
  • Circuiting system, 79.
  • Clapper arm, 70.
  • Closed rings, 26.
  • Coherer, 105, 108, 109.
  • Cohering, 106.
  • Coils, 18, 26, 52, 55, 74, 160.
  • Coils, choking, 145, 146, 156, 158.
  • Coils, induction, 99, 102.
  • Coils, primary, 109.
  • Coils, secondary, 102, 109.
  • Coincide, 42.
  • Cold, 14.
  • Collecting surfaces, 30.
  • Collector, 31.
  • Column, 61.
  • Combustion, 169.
  • Commutator, 44, 46, 151, 152.
  • Commutator brushes, 46.
  • Commutator plates, 45.
  • Compass, 22, 24, 172.
  • Composition, 83, 124.
  • Compound wound, 47.
  • Concave channel, 40.
  • Condenser, 98, 100, 101, 102, 108.
  • Conduct, 6, 108.
  • Conduction, 135, 136, 138, 166, 170.
  • Conduction current, 27.
  • Conductor, 21, 31, 33, 63, 98, 116, 161, 162.
  • Conduit, 72.
  • Conically formed, 126.
  • Conjunction, 143.
  • Connecting wire, 58.
  • Connection, 72, 76.
  • Construction, magnet, 39.
  • Consumption, 180.
  • Contact, 122, 123, 152, 162.
  • Contact finger, 150.
  • Contact plate, 67, 68, 79.
  • Contact screws, 93.
  • Contact surface, 66.
  • Continuous, 145.
  • Converter, 176.
  • Converting, 142, 145, 146.
  • Copper, 18, 34, 36, 65, 66, 132, 133, 134, 135, 136, 137, 142, 143.
  • Copper cyanide, 133.
  • Copper plate, 33, 35, 58, 67.
  • Copper sulphate, 57.
  • Copper voltameter, 55, 57.
  • Core, 27, 28, 36, 39, 40, 115.
  • Core, magnet, 75, 93.
  • Counter, clock-wise, 51.
  • Coupled, 36.
  • Crank, 30.
  • Crookes' tube, 184.
  • Cross bar, 52, 66.
  • Crown of cups, 32.
  • Crystal, 85.
  • Current, 6, 7, 13, 18, 26, 27, 28, 35, 36, 37, 38, 47, 50, 51, 52, 55, 56, 57, 58, 59, 62, 63, 70, 72, 73, 90, 95, 98, 105, 108, 116, 133, 134, 135, 136, 138, 139, 140, 141, 142, 143, 147, 148, 149, 150, 152, 153, 157, 160, 161, 163, 165, 166, 170.
  • Current, alternating, 150.
  • Current changing, 82.
  • Current conduction, 27.
  • Current, continuous, 164.
  • Current, direct, 145, 150.
  • Current direction, 50.
  • Current, exterior, 50, 150.
  • Current, reversing, 148.
  • Current strength, 7, 57.
  • Current testing, 143.
  • Cut-out, 120.
  • Cutter, 14.
  • Cutting, lines of force, 38.
  • Cylinder, 44.
  • Cylindrical, 43.

D

  • Dash, 95, 97.
  • Decoherer, 106, 108.
  • Decomposed, 57, 128.
  • Decomposes, 55.
  • Decomposing, 123.
  • Decomposition, 12, 35, 82.
  • Deflected, 54.
  • Degree, 135, 162.
  • Demagnetized, 24, 72.
  • Deposited, 58, 133.
  • Depression, 15, 140.
  • Detecting current, 49.
  • Detector, 49, 52, 54, 105.
  • Devices, measuring, 27.
  • Diagrams, 46, 48, 79, 89.
  • Diagrammatically, 81.
  • Diamagnetic, 19.
  • Diametrically, 114.
  • Diaphragm, 112, 113, 116, 120, 122.
  • Diamonds, 186.
  • Diluted, 86.
  • Direct current, 38, 140.
  • Direction of current, 50.
  • Direction of flow, 98.
  • Discharge, 172.
  • Disintegrate, 132.
  • Disk, 43.
  • Dissimilar, 37.
  • Disturbance, 176.
  • Dividers, 14.
  • Divisibility, 168.
  • Dot, 96, 97.
  • Dot and dash, 96.
  • Double click, 95.
  • Double line, 65.
  • Double-pole switch, 65.
  • Double-throw switch, 117.
  • Drawing, 20.
  • Drill, ratchet, 13.
  • Drops, 81.
  • Ductile, 186.
  • Duplex wire, 115.
  • Dynamo, 7, 27, 38, 42, 46, 48, 62, 82, 83, 87, 89, 132, 141, 142, 145, 150, 155, 161, 165, 167, 175, 176, 180, 187.
  • Dynamo fields, 40, 41.

E

  • Earth, 22.
  • Elasticity, 100, 142.
  • Electric, 6, 31, 49, 50, 76, 78, 81, 131, 142, 158, 162, 173, 176.
  • Electric arc, 63, 163.
  • Electric bell, 19, 69, 70, 71, 72, 106, 117.
  • Electric bulbs, 167.
  • Electric circuit, 118.
  • Electric fan, 55.
  • Electric field, 76.
  • Electric hand purifier, 129.
  • Electric heating, 135, 137, 161.
  • Electric iron, 130, 141.
  • Electric lamp socket, 139.
  • Electric light, 56, 66.
  • Electric lighting, 161.
  • Electric power, 113.
  • Electric welding, 183.
  • Electrical, 8, 11, 65, 96, 98, 104, 141, 159, 180, 184, 187.
  • Electrical impulses, 105, 147, 148.
  • Electrical manifestations, 175.
  • Electrically, 32, 70.
  • Electricity, 5, 6, 7, 8, 9, 12, 13, 18, 21, 26, 27, 28, 29, 38, 49, 54, 60, 61, 62, 82, 97, 98, 100, 104, 110, 112, 116, 123, 124, 133, 134, 136, 138, 145, 146, 147, 154, 156, 160, 166, 170, 171, 172, 175, 182, 187.
  • Electricity measuring, 49.
  • Electricity, thermo-, 142.
  • Electrified, 37, 186.
  • Electro-chemical, 55.
  • Electrode, 35, 124, 127, 128, 161, 162, 163, 164, 165, 184.
  • Electrolysis, 7, 123, 126, 132.
  • Electrolyte, 33, 35, 36, 57, 86, 88, 123, 132, 142.
  • Electrolytic, 55, 123, 125.
  • Electro-magnet, 59, 78.
  • Electro-magnetic, 7, 24, 25, 29, 37, 55, 92, 93, 94.
  • Electro-magnetic force, 7.
  • Electro-magnetic rotation, 7.
  • Electro-magnetic switch, 116.
  • Electro-meter, 7.
  • Electro-motive force, 37, 63, 99.
  • Electroplate, 12, 38, 48, 123, 132, 134.
  • Electro-positive-negative, 142, 143.
  • Elements, 36, 83.
  • Engine energy, 170, 180.
  • Equidistant, 127.
  • Ether, 104.
  • Example, 61.
  • Excited, 47.
  • Extension plate, 103.
  • Exterior, 3.
  • Exterior magnetic, 27.
  • External, 37.
  • External circuit, 153.
  • External current, 50.
  • External resistance, 37.

F

  • Factor, 61.
  • Ferrous oxide, 125.
  • Field, 46, 47.
  • Field, dynamo, 40, 41.
  • Field magnet cores, 155.
  • Field, magnetic, 38.
  • Field of force, 33.
  • Field wire, 48.
  • Filament, 168, 169, 170.
  • Filter, 128.
  • Flat iron, 140.
  • Flocculent, 128.
  • Force, 50.
  • Formulated, 19.
  • Friction, 32.
  • Frictional, 6, 7, 29.
  • Fuse, 169.

G

  • Galvani, 7.
  • Galvanic, 7, 23, 30.
  • Galvanometer, 7, 49, 108, 143.
  • Galvanoscope, 55, 58, 59.
  • Gaseous, 128.
  • Gasoline, 99.
  • Gas stove, 17.
  • Gelatine, 128.
  • Generate, 29, 38, 134, 136, 145.
  • Generated, 55.
  • Generating, 32, 134.
  • Generation, 170.
  • Generator, 32, 125, 147.
  • German silver, 136, 137.
  • Germicide, 187.
  • Gimlets, 17.
  • Glass, 30, 86, 126, 186.
  • Gold, 135.
  • Grid, 84.
  • Ground circuit, 121.
  • Gunpowder, 6.

H

  • Hack-saw, 14.
  • Hammer, 13.
  • Heart-shaped switch, 77.
  • Heater, 136.
  • Heating, 13, 38.
  • Hertzian rays, 170.
  • Hertzian wave, 184.
  • High tension, 38, 102, 184.
  • High tension apparatus, 98.
  • High tension coils, 103.
  • High voltage, 158.
  • Horizontal bar, 46.
  • Horseshoe magnet, 22, 24, 175.
  • Hydrate of aluminum, 129.
  • Hydrogen, 35, 123, 125, 128.

I

  • Igniting, 99.
  • Illumination, 162, 163, 165, 167, 170.
  • Immersed, 133.
  • Impulses, 60, 62, 96, 104, 109, 152, 179.
  • Incandescent, 166, 168.
  • Induced, 28.
  • Inductance, 149, 150.
  • Induction, 27, 37, 98, 147.
  • Induction coils, 99, 102, 106.
  • Influences, 178.
  • Initial charge, 88.
  • Insulated, 27, 28, 40, 43, 52, 55, 73, 115, 151, 180.
  • Insulating, 66, 69, 120, 140, 164.
  • Insulating material, 114.
  • Insulation, 40, 116.
  • Instruments, 49, 94, 112, 118, 120.
  • Instruments, measuring, 8.
  • Intensity, 55, 60, 104, 154.
  • Interior, magnetic, 23.
  • Internal resistance, 37.
  • Interruption, 102, 103.
  • Installation, 168.
  • Ionize, 186.
  • Iron, 19, 132, 133, 136, 142, 171.
  • Isolated, 186.

J

  • Jar, 29, 31, 32.
  • Journal, 46.
  • Journal block, 16, 146.
  • Jump spark, 99.

K

  • Key, 90, 91, 95.
  • Key, sending, 90.
  • Knob, 32.
  • Knob, terminal, 31.

L

  • Laboratory, 9.
  • Lead, 31, 136.
  • Lead, precipitated, 83, 85.
  • Lead, red, 83, 84.
  • Lever switching, 67.
  • Light, 104.
  • Light method, 56.
  • Lighting, 9, 38.
  • Lighting circuit, 48.
  • Lighting system, 82.
  • Lightning, 6, 171, 172, 173.
  • Lightning rod, 173.
  • Lime, chloride of, 84.
  • Line of force, 146.
  • Line wire, 122.
  • Line, magnetic, 22, 23.
  • Liquid, 32.
  • Litharge, 83.
  • Loadstone, 17.
  • Locomotives, 165.
  • Low tension, 38, 98, 102, 179.

M

  • Magnet bar, 20.
  • Magnet core, 16, 75, 93.
  • Magnet, electro, 59, 78.
  • Magnet, horseshoe, 22, 25, 175.
  • Magnet lines, 22, 23.
  • Magnet, permanent, 25, 38, 46, 50, 172.
  • Magnet, reversed, 20.
  • Magnet, steel, 53.
  • Magnet, swinging, 53.
  • Magnetic, 7, 19, 20, 21, 22, 25, 113, 178.
  • Magnetic construction, 39.
  • Magnetic exterior, 27.
  • Magnetic field, 22, 24, 27, 38, 50, 112, 146, 148, 155.
  • Magnetic interior, 23.
  • Magnetic pull, 59.
  • Magnetic radiator, 37.
  • Magnetism, 19, 54, 104, 110, 159, 171.
  • Magnetized, 18, 25, 27, 50.
  • Magnetized wire, 146.
  • Magnets, 13, 14, 18, 19, 20, 21, 22, 23, 24, 25, 39, 51, 53, 54, 70, 71, 73, 75, 81, 90, 93, 112, 113, 115, 147, 150, 163, 176, 177, 178.
  • Main conductor, 31.
  • Mandrel, 15, 16.
  • Manganese, 19.
  • Manifestations, 19.
  • Mariner, 172.
  • Material, non-conducting, 90.
  • Maximum, 154.
  • Measure, 55, 56, 60, 62.
  • Measurement, 62.
  • Measuring devices, 27.
  • Measuring instruments, 8.
  • Mechanism, 47, 180.
  • Medical batteries, 99.
  • Mercury, 63, 169.
  • Metal base, 73.
  • Mica, 186.
  • Microphone, 118, 119, 120.
  • Millimeter, 63.
  • Minus, 34.
  • Minus sign, 21.
  • Morse code, 76.
  • Motor, 7, 21, 27, 46, 47, 62, 82, 99, 150, 176, 180.
  • Mouthpiece, 115.
  • Mouthpiece rays, 188.
  • Moving field, 117.
  • Multiple, 168.
  • Musical scale, 111.

N

  • Negative, 21, 35, 36, 68, 83, 86, 87, 94, 125, 151, 152, 154, 165, 177, 178, 179.
  • Neutral, 125.
  • Neutral plate, 84.
  • Nickel, 136.
  • Nickel plating, 132.
  • Nitrate of silver, 62.
  • Nitrogen, 126.
  • Non-conducting material, 90.
  • Non-conductor, 164.
  • Non-magnetic, 19.
  • North pole, 20, 21, 22, 23, 25, 50, 54, 156.
  • Number plate, 75.
  • N-ray, 188.

O

  • Ohms, 60, 63.
  • Ohms, international, 63.
  • Ohms law, 7.
  • Operator, 95, 118.
  • Oscillating, 99, 105.
  • Osmium, 169.
  • Oxides, 125.
  • Oxidizing, 183.
  • Oxygen, 35, 123, 125, 126, 128, 129, 169.

P

  • Packing ring, 124.
  • Paraffine, 56, 100, 101, 102.
  • Paraffine wax, 86.
  • Parallel, 87, 88, 89.
  • Parallel switch bar, 67.
  • Parallel wires, 28, 49.
  • Partition, 124.
  • Peon, 13.
  • Percolate, 128.
  • Periodicity, 159.
  • Periods of alternations, 149.
  • Permanent, 18, 19, 50.
  • Permanent magnet, 25, 38, 46, 50, 172.
  • Phase, 19.
  • Phenomenon, 27, 65.
  • Photograph, 186.
  • Physical, 21.
  • Pile, voltaic, 33.
  • Pipe, 61.
  • Pitchblende, 186.
  • Pivot pin, 53.
  • Pivotal, 22.
  • Plane, 13.
  • Plate, 57, 93.
  • Plate, contact, 67, 68, 79.
  • Plate, copper, 33, 35, 58, 67.
  • Plate, negative, 84.
  • Plate, number, 75.
  • Plate, positive, 84, 88.
  • Plate, zinc, 33.
  • Platinum, 13, 57, 137.
  • Pliers, 14.
  • Plus sign, 21, 24.
  • Pointer, 53.
  • Polarity, 154, 177, 178, 179.
  • Polarization, 35.
  • Pole, north, 20, 21, 22, 23, 25, 50, 54, 156.
  • Pole piece, 40, 42.
  • Pole, south, 20, 21, 22, 25, 50, 54, 156.
  • Poles, 177, 179.
  • Polonium, 186.
  • Porcelain, 86.
  • Porous, 85.
  • Positive, 4, 21, 25, 36, 40, 68, 83, 86, 87, 94, 123, 125, 151, 152, 153, 155, 165.
  • Post, binding, 52, 71.
  • Potentiality, 105, 109.
  • Power, 38, 186.
  • Power, candle, 89, 139.
  • Precipitate of lead, 83, 85.
  • Precision, 7.
  • Pressure, 87.
  • Primary, 35, 62, 98, 134, 142, 159, 184.
  • Primary battery, 7, 99.
  • Primary circuit, 99.
  • Primary coil, 106, 109.
  • Prime conductor, 6.
  • Projected, 185.
  • Propagated, 105, 185.
  • Properties, 55.
  • Purification, 123, 128.
  • Purifier, 126, 131.
  • Push button, 65, 68, 69, 70, 76, 79.

Q

  • Quantity, 55, 60, 61, 138.
  • Quartz, 186.

R

  • Radio-activity, 186.
  • Radium, 184, 185, 187, 188.
  • Ratchet drill, 13.
  • Reaction, 148.
  • Receiver, 12, 90, 97, 121, 122.
  • Receiving station, 109.
  • Rectangular, 69.
  • Rectifiers, 146.
  • Red lead, 83, 84.
  • Reel, 13.
  • Reflected, 185.
  • Refraction, 185.
  • Refractory, 182.
  • Register, 57.
  • Removable, 54.
  • Removable cap, 73.
  • Repel, 20.
  • Repulsion, 21, 128.
  • Reservoir, 61, 62.
  • Resiliency, 99.
  • Resistance, 7, 36, 37, 60, 63, 99, 135, 136, 137, 138, 140, 141, 156, 157, 163, 166, 168.
  • Resistance bridge, 7.
  • Resistance, external, 37.
  • Resistance, internal, 37.
  • Rheostat, 7.
  • Reversed, 20, 50, 153.
  • Reversible, 163.
  • Reversing, 176.
  • Reversing switch, 67.
  • Revolubly, 46.
  • Revolve, 179.
  • Revolving, 177.
  • Roentgen rays, 184.
  • Roentgen tube, 187.
  • Rotation, 149.
  • Rubber, 40, 46, 77, 115, 126, 130, 138.

S

  • Sad-irons, 13.
  • Saline, 133.
  • Sanitation, 12.
  • Saturated, 85.
  • Screw, 15.
  • Screw, binding, 65, 66.
  • Screw-driver, 14.
  • Screw, set, 72.
  • Sealing wax, 53.
  • Secondary, 62, 98, 105, 158, 159, 160.
  • Secondary circuit, 99.
  • Secondary coil, 107, 108.
  • Self-induction, 149, 156.
  • Sender, 90, 97.
  • Sending apparatus, 106.
  • Sending key, 90.
  • Separately excited, 46.
  • Series-wound, 47.
  • Severed magnet, 20.
  • Sewage, 12.
  • Shaft, 30.
  • Shears, 14, 17.
  • Shellac, 40.
  • Shunt-wound, 47.
  • Signal, 118.
  • Silver, 19, 63, 125.
  • Silver nitrate, 62.
  • Socket, 54, 139.
  • Soldering, 14.
  • Soldering iron, 17.
  • Solution, 55, 57, 62, 63, 84, 86, 133, 134, 142.
  • Sounder, 90, 92, 95, 96.
  • Sounding board, 119.
  • Source, charging, 83.
  • South pole, 20, 21, 22, 25, 50, 54, 156.
  • Spark gap, 102, 106.
  • Spark jump, 99.
  • Spring finger, 69.
  • Square, 14, 17.
  • Standard, 62, 63.
  • Station, 94, 95, 117, 122.
  • Steel, 18, 19.
  • Steel magnet, 53.
  • Sterilized, 12.
  • Stirrup, 75.
  • Stock bit, 13.
  • Stock contact, 121.
  • Storage, 82.
  • Storage battery, 107.
  • Storing, 82.
  • Substances, 135.
  • Sulphate, 55, 128, 133.
  • Sulphur, 19.
  • Sulphuric acid, 31, 84.
  • Sulphuric acid voltameter, 55, 57.
  • Superstition, 171, 173.
  • Surging, 153, 154.
  • Swinging magnet, 53.
  • Swinging switch blade, 67.
  • Switch blades, 66.
  • Switches, 65, 66, 70, 77, 78, 90, 117.
  • Switches, bar, 65, 68, 90, 91.
  • Switches, bar, parallel, 67.
  • Switches, heart-shaped, 78.
  • Switches, piece, 77.
  • Switches, reversing, 67.
  • Switches, sliding, 67, 80.
  • Switches, terminal, 8.
  • Switches, two-pole, 65.
  • System, circuiting, 79.

T

  • Tail-piece, 16.
  • Tantalum, 169.
  • Telegraph, 11, 90, 96.
  • Telegraph key, 106.
  • Telegraph sounder, 108, 109.
  • Telegraphing, 94.
  • Telephone, 12, 110, 113, 117, 118, 119, 120.
  • Telephone circuit, 118.
  • Telephone connections, 116.
  • Telephone hook, 122.
  • Temperature, 56, 88, 134, 161, 170.
  • Tension, high, 38, 102, 184.
  • Tension, low, 38, 98, 102, 179.
  • Terminal, 31, 34, 35, 40, 48, 82, 86, 93, 95, 107, 116, 121, 122, 151, 152, 153, 154, 156.
  • Terminal knob, 31.
  • Terminal, secondary, 102.
  • Terminal switch, 81.
  • Theoretical, 160.
  • Therapeutics, 187.
  • Thermo-electric couples, 146.
  • Thermo-electricity, 135.
  • Thermometer, 56.
  • Thorium, 169, 186.
  • Thunderbolt, 171, 173.
  • Tin, 136.
  • Tinfoil, 31, 101.
  • Tools, 11, 13, 17.
  • Torch, brazing, 17.
  • Transformer, 145, 146, 158, 159, 180, 182.
  • Transformer, step-down, 182.
  • Transmission, 38, 187.
  • Transmit, 63, 95, 157.
  • Transmitter, 12, 120, 121, 122, 123.
  • Transverse, 16, 52.
  • Transversely, 43.
  • Trigger, 75.
  • Tripod, 31.
  • Tubular, 44, 45.
  • Two-pole switch, 65.

U

  • Ultra-violet, 185.
  • Uranium, 186.

V

  • Vacuum, 184.
  • Vapor lamps, 169.
  • Velocity, 60, 73.
  • Vertical armature, 75.
  • Vibration, 110, 111, 113.
  • Vibratory, 110.
  • Vise, 13.
  • Voltage, 37, 38, 60, 61, 62, 63, 87, 88, 99, 147, 154, 165, 180, 182.
  • Voltage, high, 158.
  • Voltaic, 29, 32.
  • Voltaic pile, 33.
  • Voltameter, 7, 58, 88.
  • Voltameter, sulphuric, acid, 55, 57.
  • Volts, 60, 62, 87, 89, 132, 158, 159.

W

  • Water, 123, 138, 144.
  • Water power, 142.
  • Watts, 60, 61, 160.
  • Wave lengths, 104, 110.
  • Weight, 49.
  • Welding, 13, 182.
  • Winding, 18, 40, 47, 58, 159, 196.
  • Winding reel, 14.
  • Window connection, 76.
  • Window frame, 78.
  • Wire, 6, 18, 21, 26, 28, 156.
  • Wire, circuiting, 79.
  • Wire coil, 40.
  • Wire lead, 70.
  • Wire, parallel, 28, 49.
  • Wireless, 12.
  • Wireless telegraphy, 103, 104, 184.
  • Wiring, 80.
  • Wiring, window, 77.
  • Workshop, 11, 17.
  • Wound, compound, 48.
  • Wound-series, 47.
  • Wound-shunt, 47.

X

  • X-ray, 184, 185, 187, 188.

Z

  • Zinc, 17, 34, 35, 85, 135.
  • Zinc plates, 33.