Farm Machinery 



277 



infrequently in regular use for pumping water, grinding 

 grain, separating milk and other special operations. 

 These motors increase the capacity of the farm worker 

 by enabling him to use and direct more power, resulting 

 in more economical production. Fig. 177. 



395. Power Versus Hand Labor. The change from 

 hand tools to implements and special machinery has 

 lead to the use of more power for each worker, and the 



Fig. 177. A suggestion for the use of power on the farm. From an 

 agricultural implement catalogue. 



amount is governed somewhat by the ability of the 

 worker. Man, when working alone, is able to develop 

 only about one-eighth horse-power. When he uses one 

 horse, his capacity to work is increased eightfold, and 

 if two horses are used, sixteenfold. The American farmer 

 is not content to let his brain drive a one-horse power 

 when two, three or four may be used to advantage. 

 This demand for more power has stimulated the breed- 

 ing of larger horses for draft purposes. 



396. Care of Machinery. The operation of many 



