New York Agricultural Experiment Station. 597 



Table III. — Analysis of Buckwheat Middlings and Buckwheat Feeds and 



Price per Ton. 



At the same time it will be noticed that the cost of exceedingly low 

 grade products is about the same as of much more valuable materials. 

 Pure buckwheat middlings will run well over 30 per ct. of protein 

 and should contain only traces of hulls, if any. 



SAND. 



The last two feeding stuffs bulletins* published by this Station, 

 contained tables giving the percentages of sand and silica in certain 

 feeding stuffs samples. It was found that, almost invariably, those 

 samples to which screenings had been added contained sand, vary- 

 ing from traces to excessive amounts. 



Grain when it comes from the field contains more or less foreign 

 matter, which must be removed before it is ready for milling. This 

 is accomplished by blowing or aspirating, and passing the grain 

 over screens, which removes the small and imperfect grains, weed 

 seeds, chaffy matter and other refuse. This process of screening 

 also removes more or less sand and dirt which necessarily accompany 

 the grain and unless this gritty material is separated from the screen- 

 ings, it will appear later in feeds with which the screenings are com- 

 pounded. Straight screenings have been found to contain as high 

 as 4 per ct. to 6 per ct. of actual sand. 



*N. Y. Agi'i. Exp. Station, BuJs. 340 s.t>6 351. 



