Alfalfa in Kansas. 



311 



OPERATION. The main principle in the sweep rake is the long teeth 

 which run under the hay and carry it along. They are unloaded by back- 

 ing the rake from under the hay. 



As the rakes are made of wood they should be kept well painted and 

 nuts kept tight. (See "Sweep Rake," in index.) 



FIG. 249. The three- wheeled sweep rake. 

 [Courtesy John Deere & Company.] 



FIG. 250. The four-wheeled sweep rake. 

 [Courtesy Arizona Experiment Station.] 



FIG. 252. The hay tedder. [Courtesy Iowa Experiment Station.] 



