DIGESTIBILITY OF FISH. 13 
Data of digestion experiments with salmon in a simple mixed diet — Continued. 
Weight 
of food. 
Constituents of foods. 
Experiment, subject, and diet. 
Water. 
Protein. 
Fat. 
Carbohy- 
drates. 
Ash. 
Experiment No. 563, subject P. K.: 
Salmon (in form of fish loaf) 
Orams. 
1, 286. 
553.0 
325.0 
717.0 
60.0 
Orams. 
796.4 
417. 5 
22.4 
606.6 
Orams. 
320.0 
13.8 
26.3 
2.9 
Grams. 
139.4 
0.6 
43.6 
3.6 
Grams. 
Grams. 
30.2 
Potato 
115.6 
230.1 
101.8 
60.0 
5.5 
2.6 
Fruit 
2.1 
Sugar 
Total food consumed 
2,941.0 
49.0 
1, 842. 9 
363.0 
16.4 
346.6 
187.2 
6.2 
181.0 
507. 5 
19.1 
488.4 
40.4 
Feces 
7.3 
33.1 
— = 
Per cent utilized 
95.5 
96.7 
96.2 
81.9 
Experiment No. 564, subject C. J. W.: 
Salmon (in form of fish loaf) 
1,115.0 
431.0 
177.0 
842.0 
105.0 
690.5 
325.4 
12.2 
712.3 
277.4 
10.8 
14.4 
3.4 
120.9 
0.4 
23.7 
4.2 
26.2 
90.1 
125.3 
119.6 
105.0 
4.3 
1.4 
Fruit 
2.5 
Sugar 
Total food consumed 
2, 670. 
56.0 
1, 740. 4 
306.0 
23.6 
282.4 
149.2 
7.4 
141.8 
440.0 
18.4 
421.6 
34.4 
Feces 
6.6 
Amount utilized 
27.8 
Per cent utilized 
92.3 
95.0 
95.8 
80.8 
Average food consumed per subject per day 
745.4 
466.2 
98.0 
49.6 
121.0 
10.6 
Summary of digestion experiments with salmon in a simple mixed diet. 
Experiment No. 
Subject. 
Protein. 
Fat. 
Carbo- 
hydrates. 
Ash. 
561 
H. R. G... 
Per cent. 
91.9 
91.7 
95.5 
92.3 
Per cent. 
96.9 
88.7 
96.7 
95.0 
Per cent. 
96.6 
94.0 
96.2 
95.8 
Per cent. 
85.8 
562 .. 
A. J. H 
76.9 
563 
P. K 
81.9 
564 
C.J. W 
80.8 
92.9 
94.3 
95.7 
81.4 
In the test periods in which canned salmon was included in the 
experimental ration, the subjects ate an average of 355 grams of 
salmon daily. The total diet eaten supplied 98 grams of protein, 50 
grams of fat, and 121 grams of carbohydrates per day, and the coef- 
ficients of digestibility were found to be 92.9 per cent for protein, 
94.3 per cent for fat, and 95.7 per cent for carbohydrates. The fuel 
value of the diet was 1,326 calories. When allowance is made for 
the undigested protein and fat residues occurring in the feces result- 
ing from the accessory foods of the diet, the digestibility for the 
protein and fat of salmon is found to be 93.2 per cent and 93.7 per 
cent, respectively, and indicates that salmon is very completely uti- 
lized by the human body. 
