DIGESTIBILITY OF MISCELLANEOUS ANIMAL FATS. 7 
Data of digestion experiments with hid fat in a simple mixed diet- — Continued. 
Weight 
of foods. 
Constituents of foods. 
Experiments, subjects, and diet. 
Water. 
Protein. 
Fat. 
Carbohy- 
drate. 
Ash. 
Experiment No. 714, subject A. A. K.: 
Grams. 
1, 428. 
237.0 
1, 204. 
168.0 
Grams. 
771.0 
21.3 
1,046.3 
Grams. 
26.3 
25.1 
9.6 
Grams. 
167.8 
3.6 
2.4 
Grams. 
451.8 
183.2 
139.7 
168.0 
Grams. 
11.1 
Wheat biscuit 
3.8 
Fruit 
6.0 
3,037.0 
104.0 
1,838.6 
61.0 
13.1 
47.9 
173.8 
21'. 4 
152.4 
942.7 
59.4 
883.3 
20.9 
Feces 
10.1 
10.8 
Per cent utilized 
78.5 
87.7 
93.7 
51.7 
Average food consumed per subject per day 
971.3 
945.5 
22.9 
61.9 
333.9 
7.1 
Summary of digestion experiments ivith kid fat in a simple mixed diet. 
Experiment No. 
Subject. 
Digestibility of entire ration. 
Estima- 
ted di- 
Protein. 
Fat. 
Carbohy- 
drate. 
Ash. 
gestibil- 
ity of 
kid fat 
alone. 
712 
P. K 
Per cent. 
89.3 
97.1 
78.5 
Percent. 
91.0 
95.2 
87.7 
Per cent. 
95.7 
95.3 
93.7 
Per cent. 
65.8 
74.7 
51.7 
Per cent. 
94.1 
713 
J. C. M 
98.4 
714...- 
A. A. R 
93.4 
88.3 
91.3 
94.9 
64.1 
95.3 
The coefficients of digestibility of the diet as a whole were found to 
be 88.3 per cent for protein, 91.3 per cent for fat, 94.9 per cent for 
carbohydrate, and the estimated digestibility of kid fat alone is 95.3 
per cent. This figure obtained for the digestibility of kid fat is per- 
haps not directly comparable with the coefficient of digestibility, 88 
per cent, previously reported 1 for mutton fat, since the mutton fat 
was kidney fat and the kid fat was a mixed fat obtained from all 
parts of the carcass, and as has been previously noted, 2 the nature of 
fat varies somewhat with the part of the body from which it is taken. 
Though a little lower it compares very favorably in digestibility with 
goat's butter which was 99 per cent digested. The average amount 
of kid fat eaten daily, 62 grams, was somewhat in excess of 53 grams, 
the average daily consumption of mutton fat. 
In the reports of their physical condition during the test period, 
none of the subjects made any mention of any laxative effect or other 
digestive disturbances resulting from the experimental diet, and 
accordingly on the basis of the experiments here reported, it may be 
assumed that kid fat, when eaten in amounts not in excess of 60 
!U. S. Dept. Agr. Bui. 310 (1915), p. 21. 
2 U. S. Dept. Agr. Bui. 507 (1917), p. 9. 
