50 
As above noted, only six meals were taken during this test — on the 
first da\ T , one; on the second day and third day, two meals each; and 
on the fourth da}', one meal. 
The subject noticed that the diet used was monotonous, and that 
he did not look forward to mealtime with any degree of pleasur- 
able anticipation. < He also observed that while his general health 
remained good, when running up hill his legs became weak before 
reaching the top, which did not happen when using a diet of cereals, 
legumes, fruit, and nuts. Undoubtedly the loss of weight would 
have been much less and more meals would have been taken during 
the experiment had the subject been able to eat the food with more 
relish. 
DIGESTION EXPERIMENT NO. 397. 
Kind of food. — Apples and walnuts. 
Subject.— C P. H. 
Weight (with elothes). — At the beginning of the experiment, 63.1 
kilograms (139 pounds), and at the close of the experiment, 61.9 kilo- 
grams (136.5 pounds). 
Jjiwation. — Four days, with nine meals, beginning with breakfast 
December 26, 1901. 
Table 32. — Results of digestion experiment No. ->97. 
Sam- 
ple Kind of food. 
Weight Total 
of ma- j organic 
terial. matter. seii- 
Ni tr< •- 
Grams. 
Apples j 4,593 
Walnuts I 1,589 
209a 
223a 
53a 
Grams. Grams. 
467.56 ! 3.89 
592.23 24.74 
Pro- 
tein. 
Carbohydrates. 
Ash. 
Fat. Sugar, 
starch, 
etc. 
Fiber.' 
lira, us. 
24.34 
154. 60 
<ir< mis. Grams. 
24.80 1 375.70 
S96.00 29.87 
Grams. 
42. 72 
11.76 
Grams. 
11.02 
12. 08 
Heat of 
combus- 
tion. 
Calories. 
2, 100 
4,599 
Total 6, 182 1 , 059. 79 28. 63 178. 91 
Feces (water-free) 215. 45 I<s3.24 10.75 
Amount digested 876.56 17.88 
Per cent digested 
^nergy of urine . . 
Energy of food 
oxidized in the 
body 
Per cent of energy 
utilized 
82. 72 62 
67.18 
111.76 
62. 16 
420. SO 405.57 ■ 54.48 | 23.10 
70. 19 33.66 
350.31 371.91 
83.25 91.70 
11.91 
42. 57 
78.14 
1,276 
5, 423 
80.95 
140 
5,283 
7^.86 
During this experiment the subject eliminated 4,024 grams urine, 
containing 0.150 per cent or 18.14 grams nitrogen. The average 
nitrogen balance per day was therefore as follows: Income in food 
7.18 grams; outgo in urine -1.53 grams, and in feces 2.69 grams; 
indicating a loss of 0.01 gram nitrogen, corresponding to 0.25 gram 
protein. 
The subject stated that In 1 did not find this diet as sustaining as 
when bananas were used in the place of apples. Usually two meals 
sufficed for the day's need, but on the second day of the experiment 
