67 
a much closer agreement. In spite, however, of the comparatively 
larger quantity of protein consumed there was a slight loss of nitrogen, 
thus implying that this subject required between 15 and 16 grams per 
day, with about 3,300 calories of energy, in order to attain nitrogen 
equilibrium. The data recorded indicate that the body assimilated the 
food very thoroughly. 
DIGESTION EXPERIMENT NO. 11 T. 
Kind of food* — Bananas, dates, walnuts, with a small quantity of 
sugar. 
Subject— J. E. R. 
Weight (with clothes). — At the beginning of the experiment 76.7 
kilograms (169 pounds), and at the close 75.3 kilograms (166 pounds). 
Duration. — Four days, with twelve meals, beginning with breakfast 
May 6. 1902. 
Table 50. — Results of digestion experiment No. 417. 
Sam- 
6 ] o e 
Kind of food. 
Weight Total 
of ma- organic 
terial. matter. 
Nitro- 
gen. 
Pro- 
tein. 
Carboh\ 
•drates. 
Ash. 
Heat of 
combus- 
tion. 
Fat. Sugar, 
starch, 
etc. 
Fiber. 
212a 
37 
Bananas 
Dates 
Gram*. Grams. 
3, 005 417. 68 
964 544. 66 
1,290 480.71 
258 258.00 
Grams. 
4.86 
4.16 
20.08 
Grams. 
30.35 
26.03 
125. .50 
Grams. Grams. 
4.51 372.90 
2.89 495.50 
321.41 24.25 
258. 00 
Gram*. 
9.92 
20.24 
9.55 
Grains. 
15.24 
12. 53 
9.80 
Calories. 
1,768 
2, 250 
223a 
3, 722 
46 
Sugar 
Total 
Feces (water-free) 
Amount digested. 
Percent digested. 
Energy of urine . . 
989 
5,517 1,701.05 
29.10 
181. 88 
328.81 1,150.65 
39.71 
37.57 | 8,729 
130a 
228.67 205.73 
1,495.32 
8.86 
20. 24 
69.56 
55. 36 
126. 52 
69.56 
79.47 62.56 
249.34 1,088.09 
75.83 , 94.58 
8.34 
31.37 
79.00 
22.94 | 1,415 
14.63 7/2S4 
87. 90 
38.94 83.44 
158 
7,126 
SI. 64 
Energy of food 
oxidized in the 
body 
Percent of energy 
utilized 
1 1 1 
1 1 
During this experiment the subject eliminated 2,225 grams urine, 
containing 1.10 per cent or 27.51: grams nitrogen. The average nitro- 
gen balance per day was therefore as follows: Income in food 7.2S 
grams; outgo in urine 6.89 grams, and in feces 2.21 grams; indi- 
cating a loss of 1.82 grams nitrogen, corresponding to 11.38 grams 
protein. 
This experiment was preceded by a preliminary period of three 
days, during which the subject followed the same diet as in the diges- 
tion experiment. During this time there was no appreciable loss of 
weight. The subject had to perform an unusual amount of hard work 
during the test proper, which accounts, in part at least, for the loss of 
weight experienced. Furthermore, he drank very little water. 
