276 INOEGANIC AG^ENTS 



SECTION XII. 

 Class 1.— Carbon. 



Carbon is represented officially as follows : 



Caebo Animalis. Animal Charcoal. (U. S. P.) 



Synonym. — Bone black, E.; charbon, Fr.; thier (or) 

 knochen-kolile, G. 



Derivation. — Bones freed from fat are exposed to great 

 heat in close iron cylinders till ammoniacal vapors pass 

 off. The resulting charcoal is pulverized and contains 

 about 10 per cent, of carbon and 88 per cent, of calcium 

 phosphate and carbonate. 



Properties. — Dull, black, granular fragments, or a dull 

 black powder ; odorless, nearly tasteless, and insoluble in 

 water or alcohol. 



Dose.—'R. & C, 5 i.-ii. (30.-60.); Sh. & Sw., 3 ii.-iv. (8.- 

 15.); D., gr.xs.-3i. (1.3-4.). 



PEEPAEATION. 



Carbo Animalis Puriflcatus. Purified Animal Charcoal. (U. S. P.) 



Derivation. — Animal charcoal, 100, is boiled with hydrochloric 

 acid, 300, and water to remove ash. Result filtered and residue on 

 filter paper washed and dried. 



Properties.— A dull, black powder, odorless and tasteless; insoluble 

 in water, alcohol or other solvents 



Dose. — Same as above. 



Caebo Ligni. Charcoal. (U. S. & B. P.) 



Synonym. — Wood charcoal. 



Derivation. — Soft wood is charred by piling it in heaps, 

 igniting, and covering it with sand and turf to prevent rapid 

 combustion. 



Properties. — A black, odorless and tasteless powder, free 

 from gritty matter. Insoluble in water or alcohol. 



Dose. — Same as animal charcoal. 



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