DIGESTIBILITY OF SOME BY-PRODUCT OILS. 
13 
Data of digestion experiments with pumpkin-seed oil in 
a simple mixed diet. 
Weight 
of food. 
Constituents of foods. 
Experiment, subject, and diet. 
Water. 
Protein. 
Fat. 
Carbo- 
hydrate. 
Ash. 
Experiment No. 829, subject P. K.: 
Blancmange containing pumpkin-seed oil 
Grams. 
1,429.0 
368.0 
318.0 
236.0 
Grams. 
723.2 
33.1 
276.3 
Grams. 
25.1 
39.0 
2.6 
Grams. 
216.4 
5.5 
.6 
Grams. 
456.4 
284.5 
36.9 
236.0 
Gravis. 
7.9 
5.9 
Fruit 
1.6 
2,351.0 
61.0 
1,032.6 
66.7 
18.2 
222.5 
11.1 
1,013.8 
26.6 
15.4 
5.1 
48.5 
72.7 
211.4 
95.0 
97.6 
987.2 
97.4 
10.3 
66.8 
Estimated digestibility of oil alone (per 
Experiment No. 830, subject G. S. M.: 
Blancmange containing pumpkin-seed oil 
1,524.0 
231.0 
632. 
445.0 
771.3 
20.8 
549.2 
26.8 
24.5 
5.0 
230.7 
3.5 
1.3 
486.8 
178.5 
73.3 
445.0 
8.4 
3.7 
Fruit 
3.2 
2, 832. 
91.0 
1,341.3 
56.3 
26.6 
235.5 
11.9 
1,183.6 
43.2 
15.3 
9.3 
29.7 
52.8 
223.6 
94.9 
98.7 
76.5 
1, 140. 4 
96.4 
6.0 
39.2 
Average food consumed per subject per day . 
863.8 
395.7 
20.5 
366.2 
5.1 
Summary of digestion experiments 
with pumpkin-seed oil in 
diet. 
a simple mixed 
Subject. 
Digestibility of entire ration. 
Estimated 
digesti- 
Experiment No. 
Protein. 
Fat. . 
Carbo- 
hydrate. 
Ash. 
bility of 
pumpkin- 
seed oil 
alone. 
829 
P. K 
Per cent. 
72.7 
52.8 
Per cent. 
95.0 
94.9 
Per cent. 
97.4 
96.4 
Per cent. 
66.8 
39.2 
Per cent. 
97.6 
830 
G. S. M 
98.7 
62.8 
95.0 
96.9 
53.0 
98.2 
In the two tests reported above the subjects ate 21 grams of pro- 
tein, 77 grams of fat, and 366 grams of carbohydrate, which sup- 
plied 2,235 calories of energy. Of the 76 grams of fat eaten daily 
74.5 grams was pumpkin-seed oil. As they reported no laxative 
effects resulting from this diet it may be concluded that the limit of 
tolerance for pumpkin-seed oil is in excess of 75 grams daily. The 
diet as a whole was well assimilated, for the digestibility was found 
to be 62.8 per cent for protein, 95 per cent for fat, and 96.9 per cent 
for carbohydrate. The value 98.2 per cent for the digestibility of 
pumpkin-seed oil implies that this oil is well assimilated. While 
the supply of pumpkin-seed oil available was sufficient for only two 
tests, the results of these seem to justify the conclusion that pumpkin- 
seed oil of good quality would be a valuable food and possess a dietary 
value similar to that of better-known edible oils. 
