COPPER ACETATE 189 



impure article ; the pure salt is known as Crystals of Venus. 

 The taste is coppery and odor vinegar-like. Soluble in 

 ■water. 



Dose.—B.. & C, gr.15-30 (1.-2.); Sh. & Sw., gr.5-10 

 (.3-.6). 



Action External. — It is astringent, stimulant and eschar- 

 otic according to the strength and whether applied to the 

 unbroken skin or to mucous membranes or raw surfaces. 



Action Internal. — This salt is an efficient vermifuge for 

 the expulsion of ascarides from the horse. It should be 

 given in doses of gr.15-30 (1.-2. gm.) twice daily with pow- 

 dered gentian and charcoal, 1 drachm of each (1.0 gm.), for 

 a week and then be followed by a cathartic dose of aloes. 

 It is a poison in large doses, causing gastro-enteritis, con- 

 vulsions and death. The antidotes are milk, raw eggs and 

 soap. 



Bismuthum. 



(Bismuth is not employed medicinally in the metallic state.) 



BiSMUTHi SuBCABBONAS. Bismuth Subcarbonate. (BiO)^CO,: 

 + H,0 ? (U. S. P.) 



Synonym. — Bismuthi carbonas, B. P. 



Derivation — Made by dissolving pure metallic bismuth 

 in diluted nitric acid, precipitating with ammonia water, 

 and redissolving in nitric acid. This solution is treated with 

 ammonium carbonate, or a solution of sodium carbonate. 



2 Bi (NO^), + 3 Na, CO, + H,0 = (BiO), CO, + H,0 

 -I- 2 COj + 6 NaNOj. The precipitated bismuth subcarbo- 

 nate is filtered and washed. 



Properties. — A white, or pale yellowish-white powder, 

 of somewhat varying chemical composition ; odorless and 

 tasteless, and permanent in the air. Insoluble in water or 

 alcohol, but completely soluble in nitric or hydrochloric 

 acid, with copious efflorescence. 



Dose.—B.., 3ii--iv. (8.-15.); D., gr.x.-xxx. (.6-2.). 



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