COMBUSTION. 85 



Q. What is the cause of the COMBUSTION of 

 FIRK ?* 



A. The carbon of fuel unites with the 

 oxygen of the air, and forms carbonic 

 acid gas. 



Q. What is the cause of the COMBUSTION of a 



CANDLE Or LAMP ? 



A. The carbon of the oil or tallow 

 unites with the oxygen of the air, and 

 forms carbonic acid gas. 



Q. What is the cause of SPONTANEOUS 



COMBUSTION ? 



A. The piled-up goods ferment from 

 heat and damp; and (during fermentation) 

 carbonic acid gas is formed, as in the two 

 former cases. 



Q, Does the HEAT of tlie HUMAN BODY arise 

 from the SAME CAUSE as the heat of FIRE ? 



A. Yes, precisely. The carbon of 

 the blood, combining with the oxygen of 

 air inhaled, produces carbonic acid gas, 

 which is attended with combustion. 



Q. If animal heat is produced by COMBUSTION, 

 why does not the human body BURN UP like a coal 

 or candle ? 



A. It actually does so. Everymuscle, 

 nerve, and organ of the body, actually 



