The ratio of the heat value of carbon to hydrogen is about as 

 seven to thirty, and alcohol has a higher ratio of hydrogen to 

 carbon than gasoline. For this reason alcohol would have a 

 slightly higher heat value were it not for the oxygen present in 

 the compound. But on account of this oxidation which has taken 

 place the alcohol generates less heat than does gasoline. 



TABLE II. 



CONSTITUENTS OF ONE GALLON OF FUEL. 



Gasoline 



Alcohol 



It is to be noted that the amount of combustible material in one 

 gallon of alcohol is much less than the amount in one gallon of 

 gasoline. 



