CHAPTER II. 

 THE SEPARATOR 



While varying in minor details the modern 

 thresher consists of 



First. The threshing members the cylinder and 

 concave, with their teeth, the grate and the feed 

 board. 



Second. The separating members, which separate 

 the loosened grain from the straw the beater, 

 check-board, racks or raddles. 



Third. The cleaning members which remove the 

 chaff and dirt the cleaning mill or shoe, and screens. 



Fourth. The delivery members which carry the 

 grain in one way and the straw in another the grain 

 spout, tailings elevator and straw carrier. 



THE THRESHING MEMBERS 



CYLINDER. 



A cylinder consists of a number of parallel bars 



fastened to the peri- 

 pheries or margins 

 of circular discs, 

 spiders, or heads by 

 means of bands 

 shrunk around them, 

 the whole being 



CYLINDER mounted on a suita- 



ble shaft. The 

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