Chap. 37.] Inflammable Subjtarues. 247 



compound inflammable fubftances, fuch as oils, refins, 

 fat, &c. it will be found that they confift of different 

 proportions and dates of combination, of carbon, hy- 

 drogen, and oxygen. The inflammable matter of 

 charcoal and coke confifts of carbon only j pitcoal and 

 wood, in their crude ftate, contain alfo fome hydrogen, 

 which is driven off, together with water and oil, in the 

 procefs of charring. 



