COMMERCIAL FEEDS 



79 



COMPOSITION OF FLAX SEED AND ITS FEEDING BY-PRODUCTS 



Value of Old and New Process Meal. Woll found by artificial 

 digestion that the protein of old process meal is 10 per cent, 

 more digestible than the protein of the new process meal. This 

 lower digestibility of protein in the new process meal is attrib- 

 uted to the use of steam to drive off the naphtha. We learned 

 that the cooking of plant substances reduces the digestibility of 

 protein. 



Other Vegetable Oil Feeds are peanut meal, sunflower seed 

 meal, rape seed meal, cocoanut meal and palm-nut meal. These 

 are not used extensively in this country for feeding stock. The 

 whole peanuts of course are used for human and hog feed, but 

 are not common as commercial feeds. 



Alcoholic By-Products. Brewers' grains, malt sprouts, and dis- 

 tillers' grains are examples of these by-products. They are 

 rich in nitrogenous substances containing about ^2 to 24 as much 

 protein as choice cotton seed meal, when dried. 



i. Brewers' Grains. These are the by-products from the manu- 

 facture of beer. They consist principally of barley grains from 

 which the starch and other soluble matter have been extracted. 

 When brewers' grains are used without drying, as wet brewers' 

 grains, they must be fed near the brewery, as their high water 

 content will not permit of shipping, because of the liability of 

 fermentation setting in especially in warm locations, and the 

 cost of transportation generally makes them unprofitable as feed. 



1 Bui. 141, Indiana Experiment Station. 



