61 
During this experiment the subject eliminated 2,87:2 grams urine, 
containing 0.601 per cent or 17.26 grams nitrogen. The average 
nitrogen balance per day was therefore as follows: Income in food 8.95 
grams; outgo in urine 5.75 grams, and in feces 2.17 grams; indicating 
a gain of 1.03 grams nitrogen, corresponding to 6.44 grams protein. 
As previously stated, gofio is a mixture of cereals roasted and 
ground, which is quite commonly eaten in the Canaiy Islands. 
A diet consisting of only one article of food — and an unpalatable 
one at that — can not be satisfying, and it is natural that the subject 
experienced some difficulty in carrying out the experiment. The 
nitrogen equilibrium, however, was more than maintained, although 
there was a decrease of 2 pounds in the body weight. During the 
experimental period the subject worked a long time each day at 
gardening. 
DISCUSSION OF DIGESTION EXPERIMENTS AVITH SUBJECT C. P. H. 
The results obtained in the digestion experiments with subject 
C. P. H. are summarized below, Table 46 showing the weight and 
composition of the food eaten per da}^, Table 47 the percentages 
digested, and Table IS the balance of income and outo-o of nitrogen 
during the periods covered by the digestion experiments. 
Table 46. — JVeigJit and composition of food per man per day.<" 
Ex- 
peri- 
ment 
No. 
Kind of food. 
Weight Total 
of ma- organic 
terial. matter. 
Nitro- 
gen. 
Pro- 
Fat. 
Carbohydrates. 
Heat of 
Ash. combus- 
tion. 
391 
392 
399 
400 
402 
4l»4 
407 
40S 
401) 
410 
411 
412 
413 
414 
Bananas 
Bananas and al- i 
monds 
Bananasandwal- i 
nuts ' 
Apples and wal- | 
nuts 
Apples and al- | 
monds 
Apples, bananas. 
and walnuts ! 
Apples, bananas. 
and almonds . . . 
Apples, bananas. 
and Brazil nuts. 
Apples, bananas. 
and pecans 
Apples, bananas, 
pecans, and 
granose 
Oranges, bananas, 
and pecans 
Oranges, bananas, 
pecans, granose. 
Oranges, prunes. 
walnuts 
Dates, olives, 
walnuts 
Dates, olives, al- 
monds 
Dates, olives, al- 
monds, granose. 
Grams. 
2, 173 
1,885 
1,808 
1,546 
1,673 
2,424 
2,105 
2,559 
2, 345 
1,011 
1,857 
1,639 
1,502 
915 
1,049 
772 
Grains. 
302. 09 
356. 86 
312. 60 
264. 95 
346.06 
389.45 
522. 83 
383.23 
378. 65 
Grams. 
3.51 
6.18 
6. 58 
7. 16 
7.13 
8. 50 
11.41 
6. 35 
5. 66 
Grams. 
21.95 
38.60 
41.14 
44.74 
44. 50 
53. 10 
71.25 
39.69 
35.36 
384.11 
7.42 
346. 11 
(i. 26 
434.06 
7.80 
538. 91 
9.87 
416.97 
5. 47 
512. 19 
5. 98 
362. 79 
7.41 
39.12 
48. 78 
I * 
37.39 
46.31 
Grams. 
3.26 
67.95 
67.73 
1 05. 20 
123.41 
102.31 
187. 04 
92. 67 
88.35 
64.87 
103. 83 
56.06 
118.71 
82. 75 
109.02 
75.43 
Average of 
16 experi- I 
ments 1, 
7.04 44.01 j 90.56 
1,831 
a With the exception of Nos. 391 and 411, representing averages of three-day trials, the figures per 
day represent the averages of four-day test^. 
b A<h of Nos. 397 and 408 not included in average. 
