88 
Table 31 summarizes the result of the calorimetric measurements 
during this experiment. 
Table 31. — Summary of calorimetric measurements — Metabolism experiment No. IS. 
Period. 
(a) 
Heat 
measured 
in terms 
(b) (c) 
Change Capacity 
oftem- correc- 
perature tion of 
ofcalo- ealorime- 
rimeter. tei 
\d) 
Correc- 
tion due 
to tem- 
perature 
oi food 
and 
dishes. 
(«) 
Water 
vaporized 
equals 
total 
amount 
exhaled 
less 
amount 
condensed 
in cham- 
ber. 
(/) 
Beat 
used in 
vapori- 
zation of 
water. 
6X0.592. 
iff) 
Total 
heat 
deter- 
mined, 
- - 
Nov. 
7 a. m. to 1 p. no 
1 p. in. t<» 7 j>. m — 
7 p. in. t<> 1 a. m — 
1 a.m. to 7 a. in 
Total 
7a.m. to 1 p.m 
1 p. m. to 7 i>. m 
7 i>. m. to 1 a. m 
1 a. m. to 7 a. m 
Total 
7 a. m. to 1 ]». in 
1 j>. m. to 7 p. m 
7 i>. m. to 1 a. m 
1 a.m. To 7 a. m 
Calories. 
530.2 
161.8 
293. 1 
Degree. Calories. 
+0. 02 1 . 2 
00 
04 2 4 
Calories. 
- 30.3 
- 43.4 
189.6 
S2 
219.7 
167.5 
112.2 
108.0 
130.1 
Calories. 
613.3 
+ .02 +1.2 
99. 2 393. 8 
1,856.1 
- 73.7 
759. 1 
449.5 2,231.9 
9-10 
is-"), 8 - .Ul + .6 
198.5 .01 - .6 
151. 1 - .03 -1.8 
- • 04 -'J. 4 
- 30.8 
190.8 
179.2 
200.7 
178.1 
112.5 668.1 
106.1 
118.8 571.4 

106. 1 116. 6 
1,742.5 4 - .6 -74.1 
748.8 
442. s 2.111.8 
10-11 
485. 3 + . 04 2. 1 
196.1 .07 -4.2 
10 - -l-fi.O 
- 29.2 
- 14.8 
185.9 
186.7 
164. 3 
110.1 568.6 
110.5 
121.5 567.2 
1 ' 
- .05 -3.0 
97.3 
U5.2 
Total 1,742.0 
Total, odays. 5.340.6 
1.2 - 74.0 
742. 2 
139.4 2,108.6 
H.8 
-221.8 2,2.50.1 
Balance of incorm and outgo of matter and energy. — The calculated 
income and outgo of nitrogen, carbon, hydrogen, and energy are shown 
in the Table- 32-35. 
The subject was not as nearly in nitrogen equilibrium as in many of 
the previous experiments, and the loss of nitrogen on the first day of 
the experiment was much greater than, on the 2 days following. In 
connection with these experiments it has become a matter of frequent 
observation that the elimination of nitrogen in the urine seems to be 
affected by numerous causes little understood. Thus in this experi- 
ment the elimination of nitrogen in the urine during the 4 days 
preliminary to the experiment amounted to 1."..:;. L4.8, 20.9, and lM.4 
grams, respectively, while tin 1 nitrogen eliminated in the urine during 
tie- :; days of the experiment proper amounted to 21.1. 18.8, and 18.6 
grams, respectively. It is difficult to understand the exact cause for 
the large elimination of nitrogen during the 2 days preceding the 
experiment and the first day in the apparatus. It was doubtless due 
to some physiological or psychic cause, but well illustrates the large 
fluctuation which may occur in the excretion of nitrogen without 
