52 
DIGESTION EXPERIMENT NO. 100. 
Kind of food. — Apples, bananas, walnuts. 
Subject.— Q. P. H. 
Weight {with clothes). — At the beginning of the experiment, 61 kilo- 
grams (141 pounds), and at the close, 61.2 kilograms (111.5 pounds). 
Duration. — Four days, with eight meals, beginning with breakfast 
January 11, 1902. 
Table 34. — Results of digestion experiment No. 400. 
Sam- 
ple 
No. 
Kind of food. 
Weight 
of ma- 
terial. 
Total 
organic 
matter. 
Nitro- 
gen. 
Pro- 
tein. 
Fat. 
Carbohydrates. 
Ash. 
Heat of 
combus- 
tion. 
Sugar, 
starch, 
etc. 
Fiber. 
209a 
Grams. 
3,968 
4,196 
1,531 
Grams. 
403. 97 
583. 24 
570. 60 
Grams. 
3.36 
6.78 
23.84 
Grams. 
21. 04 
42. 38 
148. 97 
Grams. 
21.43 
6.29 
3S1. 52 
Grams. 
324. 60 
520. 72 
28. 78 
Grams. 
36.90 
13. 85 
11.33 
Grams. 
9.52 
21.40 
11.63 
Calorics. 
1,820 
2,470 
4,441 
212a 
223a 
Total 
Feces (water-free) 
Amount digested. 
9, 695 
1,557.81 
33.98 
212. 39 
409. 24 
874. 10 
62.08 
42.55 
8,731 
C5a 
176. 47 
151. 23 
1, 406. 58 
90.30 
8.63 
25. 35 
74.61 
53. 91 
158. 48 
74.61 
40.28 
368. 96 
90.15 
48.14 
825. 96 
94.48 
8.90 
53.18 
8f>. fifi 
25. 24 
17.31 
40.68 
1,006 
7, 725 
Per cent digested. 
88.47 
198 
Energy of food 
oxidized in the 
! 
7,527 
86.20 
Per cent of energy 
utilized 
During this experiment the subject eliminated 3,350 grams urine, 
containing 0.575 per cent or 19.30 grams nitrogen. The average 
nitrogen balance per day was therefore as follows: Income in food 
8.51 grams; outgo in urine 1.82 grams, and in feces 2.16 grams; 
indicating a gain of 1.53 grains nitrogen or 9.56 grams protein. 
The bananas were sliced and cooked to a mush without adding water 
or salt. They were found to be more palatable than when eaten either 
raw or toasted. 
This test was much more satisfactory than the previous one in many 
ways. The weight was slightly increased and there was an appre- 
ciable gain in protein. The subject remained in good physical con- 
dition during the entire experimental period, exercising and taking 
long walks. On the second day he ran almost a mile in six minutes, 
and remarked that he could have kept up the exercise longer. He 
also performed considerable mental work during the four-day experi- 
ment, writing as late as midnight on two occasions. 
