THRESHING WITH SPECIALLY EQUIPPED SEPARATOR. 165 



than for ordinary grain. The twelve-bar cylinder-speed for 

 rice should be 900 revolutions per minute and in order to 

 give the proper speed to the other parts of the separator, it 

 is necessary to have the special pulleys on the cylinder 

 shaft. These are sufficiently larger than the regular pulleys 

 to allow the cylinder to run at the desired low speed, while 

 maintaining normal speed of the other parts of the separa- 

 tor. In the same manner, the twenty-bar cylinder speed 

 for rice should be from 575 to 600 revolutions, and to 

 obtain this, a corresponding change in all the pulleys on the 

 cylinder shaft must be made. More rice is apt to be 

 cracked the first few days a new separator runs, than will be 

 afterwards, when the cylinder teeth have become worn 

 smooth. 



For rice the adjustable chaffer and shoe-sieve should be 

 set in the same position and with about the same opening 

 as for oats. Rice is considerably heavier, however, and will 

 stand the extra amount of wind required to blow out its 

 heavy chaff. When common sieves are used the chaffer 

 should be the two-inch lip, D. The three-quarter-inch lip- 

 sieve, F, placed in the second notch and third hole gives 

 excellent results as a shoe-sieve. For a screen, the one- 

 fourteenth by one-half-irich oblong-hole, L, is best, ordi- 

 narily. When the rice is so small that this screen lets too 

 much through, the one-sixteenth by three-eighths-inch 

 oblong-hole, K, may be used. 



Hulling Clover. The process of removing clover seed 



