47 
The average coefficients of digestibility for the fruits and nuts in the 
above experiments made with this subject indicate that these foods 
possess a high nutritive value. This is shown further by the fact that 
during the entire experimental period of eleven weeks, from November 
19, 1901, to February 7, 1902, w^hile living upon a diet consisting 
mainly of fruit and nuts the subject gained 7 pounds in body weight. 
It appears from Table 28 that the income of nitrogen in the food was, 
with the exception of experiment No. 391, generally low. The 
minimum quantity of nitrogen, recorded for experiment No. 388, 
namely, 2.2 grams per day, was naturally coexistent with the maximum 
loss. It would seem from the results of experiment No. 105 that with 
a diet furnishing about 1,100 calories of energy this subject required 
about 8 grams of nitrogen per day for the maintenance of nitrogen 
equilibrium, for with a daily income of 7.6 grams of nitrogen there was 
a loss of only 0.05 gram. In two experiments, Nos. 388 and 398, 
where the income fell still lower, there was a corresponding greater 
loss of bod} T protein. In the remaining experiments, notwithstanding 
the small income of nitrogen, there is recorded an average daily gain 
varying from 1.28 grams of nitrogen in experiment No. 101 to 5.62 
grams in experiment No. 391. 
EXPERIMENTS WITH C. P. H. 
The details follow of the digestion experiments made with C. P. H., 
who, as previously stated, was a man about 60 } T ears old and in excellent 
health. For many years he had been accustomed to a diet similar to 
that eaten during the experimental period. 
DIGESTION EXPERIMENT NO. 391. 
Kind <>f food. — Bananas. 
Subjet't.'— C. P. H. 
Weight {with clothes). — At the beginning and close of the experi- 
ment, 61.7 kilograms (136 pounds). 
Duration. — Three days, with eight" meals, beginning' with breakfast 
December 2, 1901. 
Table 29. — Results of digestion experiment No. 391. 
Sam- 
ple 
No. 
Kind of food. 
Weight 
of ma- 
terial. 
Total 
organic 
matter. 
Carbohydrates. 
Ash. 
Heat of 
combus- 
tion. 
Nitro- Pro- F 
gen. tein. | rai - 
• 
Sugar, 
starch, Fiber, 
etc. 
212a 
Bananas 
Feces ( water-free) 
Amount digested. 
Per cent digested. 
Grams. Grams. 
6,520 j 906.28 
Grams. 
10.53 
Grams. 
65.85 
Grams. 
9.78 
Grams. 
809. 13 
Grams. Grams. 
21.52 33.25 
Ca/m ;rs. 
3,839 
29a 
57.40 1 50.21 
| 856.07 
2.52 
8.01 
76.07 
15.78 
50.07 
76.04 
7. 93 
1 . 85 
18.92 
24.22 | 2.28 
784.91 19.24 
97.01 1 89.40 
7.19 
26.06 
78.38 
296 
3,543 
92. 30 
63 
Energy of food 
oxidized in the 
3,480 
Per cent of energy 
90.66 
«This subject usually ate but two meals per day. 
