DIGESTIBILITY OF SOME ANIMAL FATS. 
Data of digestion experiments with basal ration — Continued. 
19 
Weight. 
Water. 
Protein. 
Fat. 
Carbo- 
hydrates. 
Ash. 
Experiment No. 268, subject R. L. S.: 
Blanc mange without added fat 
Grams. 
2,054.0 
424. 
1,225.0 
86.0 
Grams. 
1,154.5 
33.9 
1,065.8 
Grams. 
40.5 
46.7 
12.2 
Grams. 
12.9 
12.7 
Grams. 
836.0 
322.2 
147.0 
86.0 
Grams. 
10.1 
8.5 
Fruit 
3, 789. 
93.0 
2,254.2 
99.4 
28.8 
70.6 
25.6 
16.8 
8.8 
1,391.2 
38.5 
1,352.7 
18.6 
8.9 
9.7 
71.0 
34.4 
97.2 
52.2 
Experiment No. 269, subject 0. E. S.: 
Blanc mange, without added fat 
Wheat biscuit 
2,222.0 
365.0 
636.0 
226.0 
1,249.0 
29.2 
553.3 
43.8 
40.1 
6.4 
14.0 
11.0 
904.3 
277.4 
76.3 
226.0 
10.9 
7.3 
Fruit 
Total food consumed 
3,449.0 
110.0 
1,831.5 
90.3 
33.5 
56.8 
25.0 
11.7 
13.3 
1,484.0 
55.2 
1,428.8 
18.2 
Feces 
9.6 
Amount utilized 
8.6 
Per cent utilized 
62.9 
53.2 
96.3 
47.3 
Average food consumed per subject per day 
1,264.1 
720.1 
33.3 
8.8 
495.7 
6.3 
Samples of the blanc mange (containing only small amounts of milk 
fat) and of the wheat biscuit (containing cereal fat) were analyzed, 
and in the calculation it has been assumed on the basis of a previous 
investigation * that 5 per cent of the milk fat and 10 per cent of the 
wheat fat are undigested. The difference between the total ether 
extract of the feces and the amount of unutilized fat (5 per cent of 
milk fat and 10 per cent of wheat fat) is taken to be the amount of 
metabolic products occurring in the ether extract. In the following 
table are given the necessary data from the four basal ration experi- 
ments for obtaining the average percentage of metabolic products 
occurring in the ether extract of the feces. This value is a percentage 
of the weight of water-free feces. 
Allowance for metabolic products. 
Experi- 
ment No. 
266, sub- 
ject 
H. F.B. 
Experi- 
ment No. 
267, sub- 
ject 
D.G. G. 
Experi- 
ment No. 
268. sub- 
ject 
R. L. S. 
Experi- 
ment No. 
269, sub- 
ject 
O.E. S. 
Weight of water-free feces 
Grams. 
136.0 
14.5 
17.8 
11.8 
.7 
1.8 
9.3 
Grams. 
87.0 
12.1 
10.0 
8.3 
.6 
1.0 
6.7 
Grams. 
93.0 
12.9 
12.7 
16.8 
.6 
1.3 
14.9 
Grams. 
110.0 
Milk fat in blanc mange 
14.0 
Vegetable fat in wheat biscuit 
11.0 
Total ether extract of feces 
11.7 
Undigested milk fat in feces (estimated) 
.7 
Undigested wheat fat in feces (estimated) 
1.1 
Metabolic products in ether extract of feces 
9.9 
Per cent of water-free feces computed as metabolic prod- 
6.84 
7.70 
16.02 
9.00 
i Connecticut Storrs. Sta. Rpt. 1899, p. 104. 
