22 



94% Alcohol flashed at 58.5 degrees F. 



90% Alcohol flashed at 58-}- degrees F. 



64 B. Gasoline flashed at 15.4 degrees F. 

 This same comparison was made in a different way. The 

 fuels were maintained at the same temperature, 79 degrees F., and 

 the same amount of surface exposed to air, and were tested to 

 find how near a small flame could be brought to the surface of 

 each before the vapor ignited, care*being taken to prevent drafts. 

 The average distance for gasoline was I 7-16 inches, and for 

 alcohol was I inch. These tests indicate greater safety in the use 

 of alcohol. This fact must not encourage carelessness, but should 

 simply be taken to indicate that less danger is involved in the use 

 of alcohol than in the use of gasoline. 



EXTINGUISHING THE FLAME 



The best and about the only practical method of extinguishing 

 a gasoline flame is to smother it, and this is often impossible on 

 account of there being nothing at hand for the purpose. A gaso- 

 line flame cannot be extinguished by applying water, for the 

 gasoline will float and the use of water simply spreads the flame. 



With alcohol these conditions are reversed as the alcohol flame 

 is more easily extinguished, due to the fact that alcohol vaporizes 

 less rapidly, and also to the fact that alcohol and water mix in all 

 proportions which raises the flash point of the alcohol. 



The following mixtures of alcohol and water were made and 

 tested as to their inflammability : 



TABLE VI. 



INFLAMMABILITY OF ALCOHOL. 



