FUEL 



' One pound of hydrocarbon, containing 14 per cont. 

 of furnace-gas, consisting of : 



503 



of hydrogen, yields about 31 Ibs, 



'One pound of hydrocarbon, containing 25 percent, of hydrogen, yields about 36 

 of furnace-gas, containing : 



1 1 am not aware of any liquid hydrocarbon applicable as fuel, which contains so much 

 as 25 per cent, of hydrogen, so that an evaporative effect of about 16 Ibs. of steam per 

 pound of hydrocarbon burnt must be regarded as the maximum result to be attained 

 with such material used as fuel. By burning these hydrocarbons with only just enough 

 air for combustion, or half the quantities assumed to be supplied in the above estima- 

 tions, the effect capable of being realised would be from 13 to 14 per cent, greater than 

 in the case stated above, or about 18 Ibs. of steam per pound of hydrocarbon contain- 

 ing 14 to 15 per cent, of hydrogen. 



