DIGESTIBILITY OF MISCELLANEOUS ANIMAL FATS. 



Data of digestion experiments with goafs-milk butter in a simple mixed 



diet — Continued. 





Weight 

 of foods. 



Constituents of foods. 



Experiments, subjects, and diet. 



Water. 



Protein. 



Fat. 



Carbohy- 

 drate. 



Ash. 



Experiment No. 648, subject A. A. R.: 



Blancmange containing goat's milk butter. 



Grams. 

 1,770.0 



192.0 

 1,059.0 



210.0 



Grams. 



998.3 



17.3 



920.3 



Grams. 



46.4 



20.3 



8.5 



Grams. 



122.3 



2.9 



2.1 



Grams. 

 593.1 

 148.4 

 122.8 

 210.0 



Grams. 

 9.9 

 3.1 



Fruit 



5.3 



















3,231.0 

 71.0 



1,935.9 



75.2 

 25.0 

 50.2 



127.3 



6.6 



120.7 



1,074.3 

 33.0 



1,041.3 



18.3 





6.4 







11.9 

















66.8 



94.8 



96.9 



65.0 











Average food consumed per subject per day. . . 



995.3 



558.1 



27.0 



44.6 



359.7 



6.0 



Summary of digestion experiments with goafs-milk butter in a simple mixed 



diet. 





Subject. 



Digestibility of entire ration. 



Esti- 

 mated 



Experiment No. 



Protein. 



Fat. 



Carbohy- 

 drate. 



Ash. 



digesti- 

 bility of 

 goat's 

 milk but- 

 ter alone. 



645 



A. F 



Per cent. 

 71.6 

 76.9 

 72.4 

 66.8 



Per cent. 

 92.4 

 93.8 

 93.3 

 94.8 



Per cent. 

 97.2 

 98.1 

 96.9 

 96.9 



Per cent. 

 59.4 

 71.7 

 64.5 

 65.0 



Per cent. 

 97.4 



646 



P. K 



97.5 



647 



J. C. M . . 



98.6 



648 



A. A. R 



100.0 











71.9 



93.6 



97.3 



65.2 



98.4 







Considering the diet as a whole, the subjects ate on an average 

 27 grams of protein, 45 grams of fat, and 360 grams of carbohydrate 

 daily, which supplied approximately 2,079 calories of energy. Since 

 the available amount of goat's butter was small, only about 45 grams 

 of fat, of which about 43 grams was goat's butter, was eaten daily. 



The digestibility was found to be 71.9 per cent for protein, 93.6 

 per cent for fat, and 97.3 per cent for the carbohydrate supplied by 

 the diet as a whole. When correction is made for the metabolic 

 products and undigested basal-ration fat which occurs in the ether 

 extract of the feces, the figure 93.6 per cent for the digestibility of 

 the total fat of the diet becomes 98.4 per cent for the digestibility of 

 goat's butter alone. 



For the sake of comparison it is of interest in this connection to 

 refer to the figure for the digestibility of cow's butter 1 determined 

 under conditions identical with those maintained for the experiments 

 here reported. This was found to be 97 per cent, a difference, which 

 for all practical dietetic purposes is negligible as compared with 99 



*U. S. Dept. Agr. Bui. 310 (1915), p. 21. 



