FOODS ANIMAL PRODUCTION. 



617 



digestibility of the rations iu the diflferent periods are given in the 

 following table: 



Coefficients of digestibility in experiments with sheep. 



The daily nitrogen balance for each period is shown in the following- 

 table : 



Nitrof/P)i balance iti experiments with nheep. 



Animal. 



Nitrogen in — 



Food. ; Urine. Feces. Gain. 



Hav and flaxseed. 

 "Do. 



No.l. 



No. 2. 



Hay, flaxseed, and starch No. 1. 



Hay, flaxseed, and oil No. 1 . 



Do I No. 2. 



Grains. 

 22. 04 

 19.39 

 22.04 

 22.04 

 19.39 



Grams. 

 15.16 

 13. 11 

 13.59 

 14.75 

 12.58 



Grams. 

 5.92 

 5.53 

 6.81 

 6.27 

 5.43 



Gi-ainr. 

 0.06 

 0.75 

 1.64 

 1.02 

 1.38 



The anthor's conclusions may be briefly summarized as follows: 



The addition of starch to the ration diminished the digestibility of 

 protein and crude fiber. The addition of fat to the ration exercised no 

 influence on the digestibility and assimilation of protein and crude 

 fiber, but diminished the assimilation of fat. The addition of starch 

 and fat to the ration did not cause as great a gain of nitrogen as when 

 added to a ration containing little fat and protein. Starch was a better 

 protector of protein than isodynamic quantities of fat. 



The experiment is discussed at length in its relation to the previous 

 work of the authors and of others. 



On the influence of the addition of increasing quantities of fat 

 to the ration upon the metabolism and gain of nitrogen in the 

 animal body, A. Wicke and H. Weiske {Ztsclir. physiol. Chem., 22 

 (i<S^6), ^o. 3, pp. 5^.j- 277).— This experiment is a continuation of the 

 work reported above and was made with the same sheep and under the 

 Siime general conditions. Sheep Ko. 1 weighed at the beginning of 

 the experiment 69 kg., and received during the whole time a basal 

 rjition of 1,000 gm. of meadow hay and 250 gm. of linseed cake. 

 Sliee]) Xo. 2 -weighed 5G.5 kg., and was fed a basal ration of 750 gm. 

 of meadow hay and 200 gm. of linseed cake. During the first period, 

 which lasted 7 days, each sheep was fed the basal ration, without any 

 additional food. During the second i)eriod, which lasted 5 days, GO gm. 



