602 ANNUAL REPORT OF THE Off. Doc. 



Respecting the uitrogen-free extract and crude fiber, little can 

 be said. Sample No. 11 contained 21.8 per cent, of pentosans. 



Dried distillers' grains are used for the same purposes as the 

 brewers' grains, but are usually of higher value. 



Very little searching chemical investigation has been given to 

 these materials as they appear on the American market. 



In 1901 was published an analysis made by Dr. C. A. Browne 

 and Mr. C. P. Beistle in the Experiment Station laboratory of dried 

 distillers' grains. I present a brief recalculation of their results. 

 The material was received in a moist, very slightly fermented state 

 from the H. J. Heinz Pickle Co., Pittsburg, and was quickly dried 

 at a temperature of ICJO degrees to ISO degrees F. 



Per cent. 



Moisture, 3 . 83 



Ash, 1.84 



Protein, 23 . 44 



Nitrogen-free extract : 



Sugar, . 00 



Dextrin, 2 . 13' 



Starch, 2.66 



Lignic acids, 10 . 81 



Pentosans dissolved bv acid, 17.66 



Undetermined (resins, pentosans, etc.), 11.12 



44.38 



Crude fiber: 



Lignin, 1 . 14 



Cellulose, 15 . 05 



Pentosans, 87 



17.00 



Crude fat, 10.25 



100.00 



This statement shows a large proportion of undetermined sub- 

 stance, part of which is resin, etc., dissolved by alcohol, and part 

 is pentosans. For an independent series of pentosan determina- 

 tions show that 24.86 per cent, of these substances were present; 

 of this amount, however, 3.88 per cent, disappeared in the treat- 

 ments for the determination of dextrin and starch and are, in part, 

 represented by the percentages given for these two constituents; 

 2.45 per cent, also are represented in the lignic acids. 



Note.— The term "distillers' grains" is applied, in America, to other products be.sides that 

 obtained in the manufacture of pressed yeast, and Includes the dried grains from alcohol and 

 whiskey distilleries and vinegar factories. Large quantities of these distillers' grains are now 

 being snlil i:i this country. 



