24 
increased diet and with increased work the total amount of unavailable 
material excreted in the feces was considerably larger than in experi- 
ment No. 9. There was not enough difference, however, in the coeffi- 
cients of availability to show whether muscular work had any marked 
effect upon the digestion of the food by the subject. 
Table 9. — Weight, composition, and heat of combustion of foods — Metabolism experiment 
No. 11. 
Lab- 
ora- 
tory 
No. 
Food materials. 
Weight 
per 
day. 
Water. 
Pro- 
tein. 
Fat. 
afei & |^|a? 
2851 
Beef 
Grama. 
170 
120 
750 
300 
no 
75 
75 
no 
Grams. 
112.9 
14.9 
681.0 
128. 1 
5.4 
5.4 
3.2 
Grams. 
46.8 
.9 
24.4 
26. 6 
12.9 
8.2 
4.3 
Grams. 
7.3 
101.0 
1.5 
4.5 
9.0 
1.1 
4.7 
Grams. 1 Grams. 
" 7.48 
| .15 
Grams. ■. Grams. 
29.26 US 
Calories. 
3°6 
2853 
Butter 
77.71 
12.11 
4.28 
11.46 
7 15 
930 
2S55 
2852 
Skininied milk .. 
37.5 3.90 30.08 
137.1 : 4.26 78 91 
286 
773 
2842 
Maize breakfast 
food 
s0. 7 2. 07 
58 7 1 31 
48.90 
488 
2840 
Wheat breakfast 
30.90 4.52 
32.09 4.85 
46.31 /.13 
304 
2841 
Ginger snaps 
Sugar 
60. 6 
110.0 
.69 
319 
436 
Total 
1,710 
950.9 
124. 1 
129. 1 
484.6 
19.86 
373. 46 55. 65 3, 862 
Table 10. — Weight, composition, and heat of combustion of feces — Metabolism experiment 
No. 11. 
Lab- 
ora- 
tory 
No. 
Weight 
of feces. 
Water. 
Pro- 
tein. 
Fat. 
Car- 
bohy- 
drates. 
Xitro- Car- 
gen, bon. 
Hydro- 
gen. 
Heat of 
combus 
tion. 
2850 
Total, 4 days 
Average, 1 day . . . 
Grams. 
563 
141 
Grams. 
398.0 
99.5 
Grams. 
56.4 
14.1 
Grams. 
36.0 
9.0 
Grams. 
49.6 
12.4 
Grams. 
8.96 
2.24 
Grams. 
80.51 
20. 13 
Grams. 
11.15 
2. 79 
Calories. 
875 
219 
The urine in this experiment w^as collected in 6-hour periods, and 
the specific gravity and nitrogen content determined. The heat of 
combustion was determined in a composite sample of the urine for 
each day, and the carbon and hydrogen in a composite sample for the 
four days of the experiment. The methods employed for determining 
the heat of combustion and for computing the carbon and hydrogen 
in the urine of each day have already been described/ The statistics 
of the outgo of matter in the urine in this experiment are given in 
Table 11. 
a U. S. Dept. Agr., Office of Experiment Stations Bui. 69, pp. 23 and 35. 
