616 AGRICULTURAL ENGINEERING 



Acetylene Gas. Acetylene is a colorless, tasteless gas 

 composed entirely of carbon and hydrogen. It is lighter than 

 air, but much heavier than coal gas. Acetylene burns with 

 a very white light, almost like sunlight. It is easy on the eyes 



Fig. 315. A 35-light acetylene generator. 



and enables one to distinguish colors accurately. The com- 

 bustion of acetylene deprives the air of about 2J/2 cubic feet 

 of oxygen for each cubic foot burned. The flame, for equal 

 candle power, produces less heat than the kerosene lamp. 



