DIGESTION EXPERIM ENTS. 



149 



DIGESTION EXPERIMENT 60 — (CORN .MEAL.) 

 [Material fed: Hay and corn meal. 



The object of this experiment was to determine the digesti- 

 bility of the protein of corn meal. The American coefficient 

 for protein is much less than the German and about 25% less 

 than that of gluten meal, which is a residue of corn left in the 

 manufacture of glucose and starch. One would expect, there- 

 fore, protein of corn and gluten meals to have about the same 

 digestibility, unless the carbohydrates which are removed in 

 the manufacture of gluten meals protect the protein from the 

 action of digestion fluids, which supposition is hardly probable. 

 It is most likely that the large difference noted is due to 

 metabolic nitrogen of the feces, which would introduce a much 

 greater error in the case of a feed low in protein, like corn meal, 

 than in the case of a feed higher in protein, like gluten meal. It 

 is necessary to feed a coarse fodder like hay with a fine feed like 

 corn meal in order to keep the animal in normal condition. 

 The digestibility of the hay used was determined in the pre- 

 ceeding experiment and in calculating the digestibility of the 

 corn meal, the individual coefficients of each sheep obtained for 

 the hay was used instead of an average of them. 



The detailed results are given in the following tables: 



RATIONS. 



Fed daily each sheep, hay, 400 grams; corn meal, 300 grams. 



COMPOSITION OF FOOD AND FECES. 





t>i 





Water-free. 













CI 



P 











a 



















_- . 



g 











G . 





03 S 





gs 



>a 



5 3 

 Sot; 



. 



'0 



c 



3 



p ~ 



+j 



- T- 

 1? 



















33 







— = 



c 





< 



" 



Eq 



fc 



pE| 



Oft 







% 



% 



% 



% 



% 



% 



% 





Fodders. 





















Hay 



4061 



53. 5 



50. 6 



94.11 

 98.00 



5. 89 



•2.00 



9.47 

 12.10 



31.82 



1.96 



50 7 

 80.37 



2.12 

 3.57 



4S67 



Corn meal 





Feces. 























405S 





S8.81 



11.19 



15.51 



28.36 



41.70 



3.24 



4694 



Sheep 11 



4059 



4060 



- 



90.64 

 91.33 



9.30 

 S.67 



15.33 

 13.02 



28.?5 

 33.48 



4:^.44 



42.14 



1 



3.02 

 2.69 



4699 



Sheep III 



4820 







