ENGINES, MOTORS AND TRACTORS 757 



but it also means that a steady pull may be secured, where with one 

 cylinder the power is secured in large quantities at fewer intervals, which 

 is not calculated to give the best efficiency. 



The multi-cylinder engine costs more at first, but the efficient service 

 which it will render wall more than compensate for its greater initial cost. 



REFERENCES 



"Power and the Plow." Ellis and Rumely. 

 "Agricultural Engineering." Davidson. 

 "Heat Engines." Allen and Bursley. 

 "Farm Gas Engines." Hirshfield and Ulbricht. 

 "Power." Lucke. 

 ,'Farm Motors." Potter. 



