TAB. XLIX. 



CARBO oxygenizatus. 

 Oxygenized Carbon. 



Class l. Combustibles. Ord. 1. Homogeneous. 

 Gen. 6. Carbon. Spec. 2. Oxygenized Carbon. 



Gen. Ghar. Hardest of all known substances. 



Spec. Char. Carbon combined with such a propor- 

 tion of oxygen as to remain in a solid state, mostly 

 opaque black. 



Syn. Native Mineral Carbon. Kirw, 2. 49 *. 



We find Mr. Kirwan's description of Native Mineral Car- 

 bon *, Blende-Khole f of Werner, so well agrees with the 

 Denbigh coal, that the chief part of his expressions may 

 with great propriety be made use of. His specimen, he ob- 

 serves, is the purest known, and came from Florence; it 

 depends much upon the choice of specimens to cull the 

 purest ; and in the same mine many varieties may be found. 



* When Mr. Kirwan wrote this, common charcoal was thought to be 

 pure carbon ; it is since found to be an oxide of carbon, and that Diamond 

 is the only native mineral carbon known. Mr. Kirwan's description agrees 

 with oxide of carbon, for which we quote him. 



\ Mr. Jameson calls this Kholc-Blend, and observes that it does not staia 

 %he fingers. 



