6 BULLETIN 613, TJ. S. DEPARTMENT OF AGRICULTUBE. 
per cent, the digestibility of goat's butter. Since all the subjects re- 
ported that they were in normal physical condition during the entire 
period of these experiments, it appears that goat's butter is a whole- 
some valuable food fat. 
KID FAT. 
The consumption of kid fat is quite limited in this country, being 
confined largely to those of foreign birth and food habits, who in- 
clude goat or kid meat in their dietary. Just as the consumption of 
lamb greatly exceeds that of mutton, the amount of kid meat eaten 
exceeds that of goat meat. Kid fat has little if any sale in this 
country as an edible fat; however, it seemed of interest to compare 
its digestibility with that of mutton fat. 
Through the courtesy of the Bureau of Animal Industry, one-half 
of the carcass of a 6-months-old kid was secured for experimental 
purposes. The kidney fat and all of the superficial fat was carefully 
removed, finely cut, and rendered in a double boiler. The meat was 
cooked and its digestibility determined by means of the usual diges- 
tion experiments, the results of which are reserved for future dis- 
cussion. The fat which cooked out of the meat was carefully saved 
and, since it had not been scorched and was free from any suspended 
matter, was added to the rendered kidney fat in order that a suffi- 
cient quantity of fat should be available for the experiments reported 
below. 
Data of digestion experiments with kid fat in a simple mixed diet. 
Weight 
of foods. 
Constituents of foods. 
Experiments, subjects, and diet. 
Water. 
Protein. 
Fat. 
Carbohy- 
drate." 
Ash. 
Experiment No. 712, subject P. K.: 
Blancmange containing kid fat 
Grams. 
1,506.0 
319.0 
492.0 
197.0 
Grams. 
813.1 
28.7 
427.5 
Grams. 
27.7 
33.8 
3.9 
Grams. 
177.0 
4.8 
1.0 
Grams. 
476.5 
246.6 
57.1 
197.0 
Grams. 
11.7 
5.1 
Fruit 
2.5 
Total food consumed 
2,514.0 
72.0 
1,269.3 
65.4 
7.0 
58.4 
182.8 
16.5 
166.3 
977.2 
41.9 
935.3 
19.3 
Feces 
6.6 
Amount utilized 
12.7 
Per cent utilized 
89.3 
91.0 
95.7 
65.8 
Experiment No. 713, subject J. C M.: 
Blancmange containing kid fat 
1,641.0 
388.0 
1,013.0 
149.0 
886.0 
34.9 
880.3 
30.2 
41.2 
8.1 
192.8 
5.8 
2.0 
519.2 
299.9 
117.5 
149.0 
12.8 
Wheat biscuit " 
6.2 
Fruit 
5.1 
Sugar 
Total food consumed 
3,191.0 
69.0 
1,801.2 
79.5 
2.3 
77.2 
200.6 
9.7 
190.9 
1,085.6 
50.9 
1,034.7 
24.1 
Feces 
6.1 
Amount utilized 
18.0 

Per cent utilized 
97.1 
95.2 
95.3 
74.7 

