22 



CONTROL BULLETIN NO. 140 



Preliminary work has been done on a method for extracting the color from 

 various oat products with an organic solvent. Refuse screenings, because of the 

 presence of large amounts of weed seeds and other impurities, give a much deeper 

 color than do ground oats. The difference in density of color can be measured 

 easily. Further work will be done in this direction. 



In the table of extensive chemical analysis of ground oats and other products, 

 the sample of Screenings No. 1 is a good grade of grain screenings. In the order 

 of quantity present it is composed of wheat, barley, oats, weed seeds and chafT. 

 Screenings No. 2, also in the order of quantity present, is composed of oat hulls, 

 weed seeds, oat shorts, grain particles (mostly barley) and chaff. This sample 

 apparently is refuse screenings. 



Extensive Chemical Analysis Ground Oats and Screenings 



