THRESHING WITH REGULARLY EQUIPPED SEPARATOR 187 



required and the cylinder-speed should be kept up to fully 

 750 revolutions for the twenty-bar and 1075 for the twelve- 

 bar cylinder separators. As with Turkey wheat, three row 

 concaves, either with plain or corrugated teeth, may be 

 used ; or a better plan is to increase the cylinder speed to 

 820 r. p. m. To do this, it is necessary to use pulley No. 

 5582T, 6 inches face, 7^4 inches diameter, 20 bar. This 

 pulley is needed so as to have the beater, crank-shaft and 

 fan run at their normal speed. In using these means to 

 remove the beards, the straw, being brittle, is apt to be 

 cut up badly and, therefore, gives the cleaning apparatus 

 a great amount of chaff to handle. 



The adjustable sieves should be set as in threshing 

 wheat. By having the front end of the shoe-sieve high 

 and the rear end low, the kernels with beards adhering to 

 them will be carried to the tailings elevator and returned 

 to the cylinder. Another advantage of placing the sieve in 

 this position lies in the fact that when so placed, it lies 

 across the path of the blast, and the wind is forced through 

 it. The chaff is thus easily lifted off and the sieve is 

 enabled to properly handle the large amount of chaff that 

 comes to it in barley threshing. With brittle barley straw, 

 the regular straw-rack sometimes shakes too much straw 

 through to the conveyor. In this case, as in threshing 

 "headings," the straw-rack should be converted into the 

 Oregon style, mentioned heretofore. When the separator 

 is fitted with common sieves, the two-inch lip, D, or the one 



