THRESHING WITH REGULARLY EQUIPPED SEPARATOR. 159 



750 for the twenty-bar or 1075 for the twelve-bar cylinder. 

 Six rows of concave-teeth should always be used, as con- 

 siderable rubbing is necessary to loosen the seed from the 

 heads. When the seed is ripe and dry, the cylinder speed 

 may be lowered considerably, and this should be done when- 

 ever possible, as a low speed favors the shoe in handling 

 this small and rather light seed. Often when the seed is 

 well ripened and allowed to stand in the field, especially if 

 in shocks that are not capped, it will be badly shelled in hand-- 

 ling so that the amount threshed will be considerably less 

 than the actual yield would be, were it possible to save it all. 



The adjustable-sieves should be set well closed for tim- 

 othy and a lower sieve must be used to get the seed clean. 

 Either the one-sixteenth-inch round-hole sieve, M, or the 

 sixteen by sixteen-mesh wire sieve, T, are suitable for tim- 

 othy seed, and either may be used successfully, if placed in 

 the seventh notch and fourth or fifth hole, When common- 

 sieves are used, the three-quarter-inch lip-sieve, F, will be 

 found to be the most suitable for a chaffer and the three- 

 eighth-inch lip, G, is an excellent upper sieve for the shoe. 



Threshing Buckwheat. This grain is easily knocked off 

 the straw and one or two rows of concave-teeth are always 

 sufficient. Very often when dry, it is best threshed with all 

 the concave-teeth removed. Buckwheat straw is brittle and 

 it is well to bear in mind that as with other grains, the work 

 of separation and cleaning is easier when the work of the 

 cylinder is not overdone. The speed should be low to pre- 



