Imitation of pure silver, so perfect in its resemblance that no chemist living can tell it from pure virgin silver. It was obtained from a German chemist now dead; he used it for unlawful purposes to the amount of thousands, and yet the metal is so perfect that he was never discovered. It is all melted together in a crucible, here it is: 1/4 oz. of copper, 2 oz. of brass, 3 oz. of pure silver, 1 oz. of bismuth, 2 ozs. of saltpetre, 2 ozs. of common salt, 1 oz. of arsenic, and 1 oz. of potash. 165. MOULDS AND DIES Take copper, zinc, and silver, in equal proportions, and melt them together, and mould into the forms you desire, and bring the same to a nearly white heat; now lay on the thing that you would take the impression of, and press it with sufficient force, and you will find that you have a perfect and beautiful impression. All of the above metals should be melted under a coat of powdered charcoal. 166. TO SOFTEN HORN To 1 lb. of wood ashes, add 2 lbs. of quicklime; put them into a quart of water, let the whole boil till reduced to one third, then dip a feather in, and if, on drawing it out, the plume should come off, it is a proof that it is boiled enough, if not, let it boil a little longer; when it is settled filter it off, and in the liquor thus strained put in shavings of horn; let them soak for three days, and, first anointing your hands with oil, work the horn into a mass, and print or mould it into any shape you please. 167. TO MAKE MOULDS OF HORN If you wish to take the impression of any coin, medal, &c., previously anoint it with oil, then lay the horn shavings over it in its softened state; when dry the impression will be sunk into the horn, and this will serve as a mould to reproduce, either by plaster of Paris, putty and glue, or isinglass and ground egg shells, the exact resemblance of the coin or medal. 168. TO CASE FIGURES IN IMITATION OF IVORY Make isinglass and strong brandy into a paste, with powder of egg shells, very finely ground; you may give it what colour you please, but cast it warm into your mould, which you previously oil over; leave the figure in the mould till dry, and you will find, on taking it out, that it bears a very strong resemblance to ivory. 169. TRUE GOLD POWDER Put some gold leaf, with a little honey or thick gum water, (whenever I speak of gum I mean gum arabic,) into an earthen mortar, and pound the mixture till the gold is reduced to very small particles; then wash out the honey or gum repeatedly with warm water, and the gold will be left behind in a state of powder, which, when dried, is fit for use. 170. TRUE GOLD POWDER