136 THE BANANA 



alcohol mixtures can be compressed to much higher 

 pressures without pre-igniting than the gasolene mixtures. 

 For 10 h.p. to 15 h.p. engines of the usual type, a pressure 

 of about 180 Ibs. above atmospheric pressure was found 

 to be the maximum for alcohol, whereas only 70 Ibs. could 

 be obtained with gasolene. Although a different type, 

 the alcohol engine can be constructed equal to the gasolene 

 engine in adaptability to service. A gasolene engine 

 having a compression pressure of 70 Ibs., but otherwise as 

 well suited to the economical use of alcohol as gasolene, 

 will, when using alcohol, have an available horse-power 

 about 10 per cent, greater than when using gasolene. 



