DIGESTION EXPERIMENTS. 



151 



DIGESTION EXPERIMENT 6l — (SKIMMED MILK.) 



Material used: Hay and skimmed milk. 



This experiment was made to determine the digestibility of 

 skimmed milk which was to be used as a source of digestible 

 protein in further experiments with corn meal. In nearly all 

 digestion experiments with 'human subjects the protein of milk 

 has been assumed to be wholly or at least 98 per cent digestible, 

 and it was expected that figures agreeing quite closely with 

 those would be obtained with sheep. It will be seen by the 

 tables that the results of the experiment give figures consider- 

 ably below the assumed digestibility and probably much lower 

 than they should be, due to> the error introduced by the presence 

 of metabolic nitrogen in the feces. The corrected results given 

 in tables on page 155 are probably more nearly correct. 



It will be observed also that the organic matter is about one 

 hundred per cent digestible, which makes the figures for protein 

 appear more inconsistant. 



RATIONS. 



Fed daily each sheep, hay, 400 grams; milk, 3,500 grams. 



Note— Slieep No. II took but 200 grams of bay per clay. 



COMPOSITION OF FOOD AND FECES. 





<~< 





Water-free. 













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Fodders. 



















Hay 



4061 

 4075 



83.50 

 9.50 



94.11 

 92.15 



5.S9 



7.85 



9.47 

 37.50 



31.82 



50.70 

 53.37 



2.12 





1.28 



Feces. 







406S 

 4069 



- 



81.78 

 77.80 



18.22 

 22.2 



15.88 

 20.15 



24.07 

 L9.78 



39.26 

 35.99 



2 . 57 



Sheep II 



1.88 



Sheep III 



4070 



- 



S6.43 



13.57 



14.70 



27 22 



42.10 



2.41 







