Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Patent Base for Artificial tal
Or: 1 pound paste and 3 drachms pur- Gems. The base of these gems, as patented ple of cassius. Or: 4 ounces paste, 4 ounces by the Superintendent of the Royal Porcelain glass of antimony, and drachm purple of Works at Berlin, is a flux obtained by melting cassius; this turns on the orange. together 6 drachms carbonate of soda, 2 drachms burnt borax, 1 drachm saltpetre, 3 drachms minium, and 1½ ounces purest white sand.