FARM MACHINERY 



301 



into the wagon box, and the cobs are conveyed in another 

 direction by a cob carrier. 



Capacity. The size of a picker sheller is designated by 

 the number of "holes," or sets of shelling wheels, and these 

 vary from the one-hole hand machine to power machines 

 with as many as eight holes. The average size is the four- 

 hole sheller, which will usually shell from 100 to 200 bushels 

 an hour; the six-hole will shell from 200 to 300 bushels an 



Fig. 191. A section of a cylinder sheller. 



hour; and the eight-hole, 500 to 600 bushels. The cylinder 

 sheller is made in the large sizes only, some having a capacity 

 of as much as 800 bushels per hour. The power required for 

 operating corn shellers varies with the size. The four-hole 

 power shellers with all attachments will usually require about 

 eight horsepower. The power required to operate cylinder 

 shellers will vary with the size, style, and the manufacturer's 

 number. 



QUESTIONS 



1. What is the work of the feed mill? 



2. Describe the various types of grinding plates used in feed mills. 



