CHAPTER VII. 



THRESHING WITH A SPECIALLY EQUIPPED 

 SEPARATOR. 



, HIS chapter will deal with those crops, the 

 threshing of which requires a change in, 

 or an addition to, a regularly equipped sepa- 

 rator. It will include the threshing of peas, 

 beans, rice, clover, alfalfa, orchard-grass, 

 Kafir and Indian-corn and peanuts. 



Threshing Peas., To prevent cracking 

 the peas, it is necessary to run the cylinder at a very 

 much lower speed than is required for threshing grain. To 

 obtain the best results, the twelve-bar cylinder should 

 ordinarily be run at from 400 to 450 revolutions per minute, 

 but when the peas are thoroughly ripened and dry, a lower 

 speed will be better, 300 revolutions being sufficient, at 

 times. Ordinarily the twenty-bar cylinder should be run 

 290 revolutions per minute, but this speed may also be 

 lessened to nearly 200 revolutions when the condition of 

 the pods permit. To secure this low cylinder speed and 

 retain the normal motion of the other parts of the machine 

 and of the engine, it is necessary to change the pulleys on 

 the cylinder shaft. * 



The number of concave rows may be two, four or six, 

 as the condition require. The cylinder must be run at a 



