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 07 per cent 

 digested. In a study of the digestibility of tofu (a soy-bean cheese), 

 Oswa and Ueda ^ 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 lishima- report that the 

 fat was 95.3 per cent and 84.3 per cent digested respectively. Suchi ^ 

 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* 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 Chemistrj-, 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 icith soij-tean 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. 4.32, 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. 

 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 



Feces 



7.7 







13.4 













50.2 



93.5 



95.4 



63.5 













lU. S. Dept. Agr., Office Expt. Stas. Bui. 159 (1905), p. 150. 



2U. 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.] 



2U. S. Dept. Agr. Office Expt. Stas. Bui. 159 (1905), p. 152 [Tokoy Igakukuwai Zashsi 

 (Jour. Tokyo Med. See), 2 (1888), pp. 457, 511.] 



*D. 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.] 



