Point XII

There is another augmentation or encrease of the Perfect Metals, very gainful, by the Imperfect, answering to the germination or growth of Vegetables, &c.

As for this augmentation, it is done by a way far distant from the foregoing, viz. in this Sol and Luna are joined with Lead, Tin, and Venus, or with Tin alone, where it is to be left for a convenient time, then the Sol attracteth from the Lead or other imperfect metals, a golden Essence, is encreased and made heavier. The Process is this: Take one lothone (or half an ounce) of Gold, eight or ten lothones (which is four or five ounces) of Lead, let them be melted together; if you please, you may add Tin or Copper; put the Crucible, together with the Lead or other imperfect metals, into a strong Crucible, give a temperate and constant Fire, that the Lead with the Gold may only flow, but not be white hot; cast into the Crucible upon it half an ounce of the best Nitre, cover the Crucible well, that no Coals fall in, and keep it in a constant easie fire, then in such a time the Lead, together with the other metals, which were mixed with it, will be turned into Glass, but the Gold being pure, is separated from the Glass by it self, and will adhere to the bottom of the Crucible, which when the Crucible is broken, take out and weigh, and you shall find your Gold encreased, and that it hath taken weight from the other metals. Although this labour affords no profit, yet it sheweth how the nature of metals are to be known. There is yet another way of trying this thing, thus, viz. Take half an ounce of Gold, join with it 5 or 6 ounces of Lead, and drive away the Lead again upon a good Test, till the Gold sparkle and shine, and you shall find your Gold to be made much heavier than it was before, which weight it hath drawn from the Lead only.