242 . VI. METALS— Oxides of. 



it, when ready to melt add, by degrees, hartshorn shavings 4oz.5 

 stirring it, and keep it in a red heat for some time. 



Antimonial powder, Pidvis antimonialis, P. L. 1788. 

 Oxidum antimonii cum phosphate calcis. Common antimony in 

 gross powder, hartshorn shavings, ana 21b. ; roast in an iron pot 

 until they form a grey powder, put this into a skittle pot, with a 

 small hole in the cover, keep it in a red heat for two hours, and 

 grind it to a fine powder. 



Dr. James's powder, Pidvis antimonialis, P. L. since 1809. 

 Common antimony lib., hartshorn shavings 2lb. ; proceed as in 

 the former. Both uncertain preparations. 



Chenevix's antimonial powder. Mercurius vita? and 

 phosphate of lime (obtained by dissolving burnt bones in muriatic 

 acid, and precipitating the solution by subcarb. of ammonia water), 

 ana, equal weights ; dissolve in muriatic acid, and pour the solu- 

 tion into water alkalized with subcarbonate of ammonia. — Febri- 

 fuge and diaphoretic, gr. iij to viij ; in larger doses, gr. x to 3j, 

 emetic and purgative ; used also as an alterative in cutaneous 

 diseases. 



BISMUTH. 



Magistery of bismuth, Pearl ivhite, Fard Spanish white, 

 Dinitrate of bismuth, Magesterium marcasitce, Bismuthi suhnitras. 

 Dissolve bismuth in nitric acid, and pour it into river or distilled 

 water, which throws down a white powder, to be washed and 

 dried in the shade, and kept from the light : comp. of 20 ox. 

 bism. 6-75 acid, and 2-25 water, equiv. f29. 



Oxide of bismuth, Bismuthi oxidum album. Bismuth 41b., 

 nitric acid q. s. about 21b. : dissolve and precipitate by subc. of 

 potash 41b., in water 61b. ; wash the precipitate well ; used as an 

 antispasmodic, and as a cosmetic paint ; grows yellow by keeping ; 

 comp. of 9 bism, with 1 oxyg., equiv. 10. 



Flores bismuthi. Bismuth lb. ss, nitre lb. j ; grind together 

 and inject by degrees into an ignited tubulated earthen retort, 

 with receivers annexed to catch the flowers. 



manganese. 



Manganese, Peroxide of manganese, Tritoxide of manganese, 

 Magnesia nigra. Found in mines ; used in a small proportion to 

 render glass colourless, or in a large proportion to colour it pur- 

 ple ; and in chemical processes to furnish oxygen gas by distilling, 

 or to supply oxygen to the species for muriatic acid, and thus 

 convert it into oxymuriatic acid: comp. of 3*5 mang. with 2'5 

 oxyg., equiv. 6'B. 



Black wad. Found in mines ; eartliy ; used as a paint. 



