SCIENCE OF THRESHING. 13 



To-day the separator performs the task of raking 

 the straw and sifting and fanning the grain. In 

 addition, it delivers the grain in one place and 

 removes the straw and chaff to another. It performs 

 these widely different steps by, 



First. Loosening the kernels from the heads. 



Second. Separating the kernels from the straw. 



Third. Removing the chaff. 



Fourth. Delivering the grain and straw in sepa- 

 rate places. 



