264 



AGRICULTURAL ENGINEERING 



teeth are made in two sizes, of Vi 6-inch and 3^-inch round steel, 

 with one or two coils at the top to give more or less elasticity 

 and with either pencil or chisel points. The teeth are spaced 

 from 33^2 "to 5 inches apart. The heavier rakes are used for 



Fig. 165. A modern self-dump sulky rake at work. 



the heavier crops like alfalfa and sorghum. A rake should 

 be so constructed as to be easily dumped and to thoroughly 

 clean itself. 



Side-delivery Rakes. The side-delivery rake has much 

 the same function as the tedder. Instead of merely turning 

 the hay, however, the side-delivery rake has a revolving 

 toothed cylinder acting in the opposite direction and set at 

 such an angle as to deliver the hay to one side in a loose, 

 fluffy windrow through which the air can circulate readily. 

 Where the hay is light, it is put in good shape for the hay- 



