600 



ANNUAL REPORT OF THE 



Off. Doc. 



[Since a ton contains also 70.4 pounds of nitrogen, the fertilizer 

 value of this quantity of the grains, at the prices now ruling, would 

 be 113.43. F.] 



Feeding Qualities: The grains should be free from scorched or 

 burned i)articles, possess a strawy odor and, when stirred with 

 luke-warm water, emit no sour or mouldv smell. When moistened 

 with recently boiled and cooled water, they should show no tendency 

 to the development of molds or bacteria and should not change in 

 odor. 



The digestibility of the constituents of the grains, as determined 

 in (a) five experiments with sheep and (b) one experiment with 

 steers, expressed in percentages digested of the total amounts of 

 the respective constituents, is: 



Total Organic matter, 



Protein, 



Fat 



Kitrogen-free extract 

 Crude fiber 



Dried brewers' grains are extensively used for all feeding pur- 

 poses and form, when property prepared, a healthful and nutritious 

 food, which keeps well under all conditions. 



DRIED DISTILLERS' GRAIN. 



Distillers' grains are very similar in their appearance and meth- 

 ods of production to brewers' grains. The distillers' grains are 

 obtained in the manufacture of yeast by the aeration process and 

 to-day the yeast is often applied to the wort instead of being put 

 in the mash, as formerly. 



The principal raw materials are green malt (less frequently, kiln- 

 dried malt), rye, or maize, more rarely wheat and buckwheat and 

 occasionally malt sprouts. 



In the mashing, the sh:(^dded grain mixture is macerated for a 

 shorter (2-3 hours) or a longer time (12-14 hours), with slightly 

 acid water. The temperature is then raised to the usual degree 

 by the addition of hot water. Any maize used is previously cooked. 

 After the starch is converted to sugars, the wort is either run off 

 from the grains or separated therefrom by means of filter-presses. 

 The grains, after repeated extraction with pure water, are then 

 dried in the same manner as the brewers' grains. 



Owing to their similarity to brewers' grains, distillers' grains 

 have only recently been sold under a distinctive name, 



