I< 



Stones and Glasses. 271 



:ide of antimony 1 oz., flint powder 3 oz. ; calcine and melt with 

 lux 50 oz. 



Dark red enamel. Sulphate of iron, calcined dark, 7 oz., 

 flux, No. 1, 18 oz., colcothar 1 oz. 



Light red enamel. Red sulphate of iron 2oz., flux, No. 1, 

 6 oz., white lead 3 oz. 



Brown enamel. Manganese 10 oz., red lead S2 oz., flint 

 wder 16 oz. — Used to cover watches and other toys. 



Paste, Strass. Rock crystal 6 Troy oz., red lead 9 oz. 5 dwt., 

 ne pearl ash 3 oz. 7 dwt. i, boracic acid 7 dwt. jr, oxide of arsenic 

 5 grains: to be kept in quiet fusion for at least 24 hours, in a 

 Hessian crucible, and cooled gradually. Used to imitate diamonds 

 in jewellery, and as a basis for making artificial gems. 



False topaz. Paste 1 Troy oz. 15 dwt, glass of antimony 

 1 dwt. 7, Cassius' purple precipitate 1 gr. 



False rdby. Paste 5 oz., oxide of manganese 2 dwt. t. 



False emerald. Paste 5 oz., oxide of copper 1 dwt. 15 gr., 

 oxide of chrome 2 gr. 



False sapphire. Paste 8 oz., oxide of cobalt 2 dwt. 9 gr. 



False amethyst. Paste 16 oz., oxide of manganese 15 to 24« 



gr., oxide of cobalt 1 gr. 



False oriental garnet. Paste 17 dwt. 19 gr., glass of 

 nntimony 8 dwt. 18 gr., oxide of manganese 2 gr. 



All used as false gems : many other compositions are made, 

 almost every artist having his own receipts. 



Chis'a blue, Royal smalt. Oxide of cobalt, melted with 

 felspar and a little American potash. Used to paint pottery ware, 

 md as a pigment. 



Tabasheer, TaJmxir. A stony concretion formed in the 

 joints of the bamboo cane. Used in diseases arising from ob- 

 iructions. 



Shell lime. Calx c testis. From oyster or other shells, by 

 calcination : corrosive, antacid, depilatory ; used for cements, to 

 Miake lime water and render the alkalies caustic. Used the same 

 IS stone lime. 



Limk-water, Aqiui calcift, Liqiwr cakis. Fresh burned lime 

 So/., |x>ur upon it boiling water a gallon, cover up close, and, 

 uli( n cold, keep the whole in a glass bottle, pour ofl* the clear 

 wli* n wanted : astringent, antacid, .^iv to lb, j, in small draughts; 

 its taste is best covered with l-5th of milk ; also externally to 

 ulcers. 



