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Silver Lustre

Reduce ammoniochloride of platinum to an impalpable powder; grind it to the requisite consistence with a little spirit of tar, and apply with a brush as directed in No. 2414.

Artificial Gems. These consist compounds made in imitaof vitreous compounds made in imitation of gems and precious stones. Like enamels, the artificial gems have for their basis a very fusible, highly transparent and brilliant dense glass, which is known under the name of frit, paste, strass, mayence base, , mayence base, &c., and which, in its state of greatest excellence, consitutes the artificial diamond. As the strass or base enters largely into the manufacture of imitation gems, we give the methgive the method for making it first. It is absolutely neis absolutely necessary, to ensure success in the following receipts, that the substances employed be peremployed be perfectly free from impurities, particularly those , particularly those of a mineral nature. Litharge, oxide of lead,