12 
BULLETIN 630, U. S. DEPARTMENT OF AGRICULTURE. 
diet (grapes, granose, pears, milk, apples, dried figs, bananas, 
oranges, dried prunes, dates) is believed to be very well utilized 
by the human body, the results of these experiments would indicate 
that the coefficient of digestibility of walnut oil eaten as a constituent 
of the nuts would not be far from 85 per cent. 
In the experiments here reported the walnut oil, which was cold 
pressed from a good grade of nuts, was fed in the usual manner to 
three healthy young men, and the data obtained are recorded in the 
following table : 
Data of digestion experiments with English-walnut oil in 
a simple mixed diet. 
Weight 
of foods. 
Constituents of foods. 
Experiment, subject, and diet. 
Water. 
Protein. 
Fat. 
Carbohy- 
drates* 
Ash. 
Experiment No. 355, subject D. G. G.: 
Blancmange containing walnut oil 
Wheat biscuit 
Grams. 
1, 736. 
402.0 
705.0 
.107.0 
Grams. 
918.7 
36.2 
612.7 
Grams. 
32.5 
42.6 
5.6 
Grams. 
209.7 
6.0 
1.4 
Grams. 
566.8 
310.8 
81.8 
107.0 
Grams. 
8.3 
6 4 
Fruit 
Sugar 
3.5 
2, 950. 
86.0 
1, 567. 6 
80.7 
29.1 
51.6 
217.1 
9.5 
207.6 
1,066.4 
39.4 
1,027.0 
18 2 
Feces 
8 
63.9 
95.6 
251. 4 
5.1 
0.9 
96.3 
679.4 
262.1 
52.2 
96.0 
2,081.0 
339.0 
450.0 
96.0 
— " — 
Experiment No. 356, subject R. L. S.: 
1, 101. 3 
30.5 
391.0 
38.9 
35.9 
3.6 
10 
Wheat biscuit 
5 4 
Fruit 
Sugar 
2.3 
Total food consumed 
Feces 
2,966.0 
60.0 
' 1,522. 8 
78.4 
19.8 
58.6 
257.4 
12.4 
245.0 
1,089.7 
21.8 
1,067.9 
17.7 
6.0 
11.7 
Per cent utilized 
74.7 
95.2 
98.0 
66. 1 
Experiment No. 357, subject 0. E. S.: 
Blancmange containing walnut oil 
2,026.0 
310.0 
1,341.0 
229.0 
1,072.2 
27.9 
1,165.3 
37.9 
32.9 
10.7 
244.7 
4.6 
2 # .7 
661.5 
239. 6 
155.6 
229.0 
9.7 
5.0 
Fruit 
Sugar 
6.7 
Total food consumed 
3.906.0 
88.0 
2,265.4 
81.5 
24.3 
57.2 
252.0 
19.0 
233.0 
1,285.7 
33.5 
1,252.2 
21.4 
Feces 
11.2 
10.2 
70.2 
92.5 
97.4 
47.7 
Average food consumed per subject per day . . . 
1,091.3 
595.1 
26.7 
80.7 
382.4 
6.4 
Summary of digestion experiments with English-walnut oil in a simple mixed 
diet. 
Experiment No. 
Subject. 
Protein. 
Fat. 
Carbohy- 
drates. 
Ash. 
355 
D. G. G 
Per cent. 
63.9 
74.7 
70.2 
Per cent. 
95.6 
95.2 
92.5 
Per cent. 
96.3 
98.0 
97.4 
Per cent. 
56.0 
356 
R.L.S 
O.E.S 
Average 
66.1 
357 
47.7 
69.6 
94.4 
97.2 
56. 6 
