DIGESTIBILITY OF SOME SEED OILS. 7 
oil daily, in addition to the 46 grams of fat supplied by the basal 
ration. The total fat of the diet was on the average 97 per cent 
digested. In a study of the digestibility of tofu (a soy-bean cheese), 
Oswa and Ueda x found the fat of the diet was 97.4 per cent digested. 
The fat eaten during this experiment was entirely supplied by the 
soy-bean tofu. In two experiments with a similar diet in which the 
tofu supplied all the fat eaten, Kano and Iishima 2 report that the 
fat was 95.3 per cent and 84.3 per cent digested respectively. Suchi 3 
conducted an experiment to determine the digestibility of a diet of 
cooked rice and cooked tofu in which 93 per cent of the fat of the 
diet was furnished by the tofu and found that the fat was 96.5 per 
cent digested. On a diet consisting of rice, tofu, sugar, starch, and 
shoyu (soy sauce) in which 99 per cent of the total fat of the diet 
was furnished by tofu Osawa 4 found that the fat was 94.8 per cent 
digested. 
Since some difficulty was experienced in securing soy-bean oil free 
from marked odor or taste, it was decided to express oil from cleaned 
mammoth yellow soy beans which had been grown under known con- 
ditions by the Bureau of Plant Industry. Through the courtesy of 
H. S. Bailey, oil specialist of the Bureau of Chemistry, the oil was 
expressed in a continuous process expeller type of oil press under con- 
ditions approximating quite closely those of the commercial oil mill. 
The cold-pressed oil obtained was filtered and used without any refin- 
ing. It was incorporated in the usual cornstarch blancmange and 
served as a part of the experimental diet. 
Seven experiments were made with soy-bean oil and the results 
which were obtained are reported in the following tables: 
Data of digestion experiments with soy-~bean oil in a simple mixed diet. 
Weight 
of food. 
Constituents of foods. 
Experiments, subjects, and diet. 
Water. 
Pro- 
tein. 
Fat. 
Carbohy- 
drates. 
Ash. 
Experiment No. 432, subject D. G. G.: 
Grams. 
1,348.0 
300.0 
1,173.0 
188.0 
Grams. 
633.9 
27.0 
1,019.3 
Grams. 
23.6 
31.8 
9.4 
Grams. 
167.3 
4.5 
2.3 
Grams. 
512.8 
231.9 
136.1 
188.0 
Grams. 
10.4 
4.8 
Fruit 
5.9 
3,009.0 
100.0 
1,680.2 
64.8 
32.3 
32.5 
174.1 
11.3 
162.8 
1,068.8 
48.7 
1,020.1 
21.1 
7.7 
13.4 
50.2 
93.5 
95.4 
63.5 
J U. S. Dept. Agr., Office Expt. Stas. Bui. 159 (1505), p. 150. 
2 U. S. Dept. Agr., Office Expt. Stas. Bui. 159 (1905), p. 172. [Gun-i Gakko Gyofu 
(Bui. Army Med. Col), Tokyo, 1899, No. 3, p. 101.] 
2 IT. S. Dept. Agr. Office Expt. Stas. Bui. 159 (1905), p. 152 [Tokoy Igakukuwai Zashsi 
(Jour. Tokyo Med. Soc), 2 (1888), pp. 457, 511.] 
4 IT. S. Dept. Agr., Office Expt. Stas. Bui. 159 (1905), p. 154 [Chugai Iji Shimpo (Med. 
News, foreign and domestic), Tokyo, 1889, No. 211, p. 6.] 
