266 POWDERED VEGETABLE DRUGS 



41. CARBO ANIMALIS. Animal Charcoal. 

 Coarse powder. Fine meal. 



Boneblack, Ivory black, E. Thierkohle, Knochenkohle, Bern- 

 schwarz, G. Charbon animal, Noir d'os, Fr. 



The partially oxidized bones of animals. 



Lustrous black. 



Odorless. 



Tasteless. 



A careful microscopical examination will reveal an occasional frag- 

 ment which shows traces of Haversian canals, lacunae and canali- 

 culi, which unmistakably disclose the origin of the charcoal. 



Ash 85 per cent., by ignition. 



Vegetable charcoal may be added. 



42. CARBO LIGNI. Charcoal. U. S. 



Coarse and fine powder. 



Wood charcoal, E. Holzkohle, Praparirte Kohle, G. Charbon 

 ve*getble, Fr. 



Made from partially oxidized soft wood (willow and other plants). 



Dull black. 



Odorless. 



Tasteless. 



Brown wood fiber remnants are quite abundant, intermingled 

 with the black coarser more oxidized cell groups. Crystals of calcium 

 are also to be found. Numerous splintery fragments. The most 

 distinctive fragments are those derived from the larger porous ducts. 



Ash should not exceed 3 per cent. 



Not generally adulterated. It is difficult to determine the source 

 of the wood from which the charcoal is made. 



