142 
from the body during the day will in this case be equivalent to the 
total amount liberated within the body and will be closely parallel with 
the amounts of carbon and hydrogen oxidized. Taking each of these 
four periods of the day by itself, the differences between the amounts 
of heat stored in the body at the beginning and end will probably be 
larger than is the case for the whole day. For individual periods, 
therefore, the parallelism between the amounts of carbon oxidized and 
heat given off will hardly be as close as for the whole day. 
'Table 150. — Heat given off by body, including for the work experiments the heat equiva- 
lent of the external muscular work — Amounts per day and rates and proportions for 
different periods. 
>> 
a 
Rate per hour. 
Proportion of total for 24 
Days covered 
experimen 
Total anioun 
24 hours. 
Day periods. 
M . , . . , 
Subject and kind of 
experiment. 
Aver- 
Day periods. 
Night periods. 
7 a. m. 1 p. m. 
to to 
1 p. m. 7 p. m. 
7 p. m. 
to 
1 a. m. 
1 a. m. 
to 
7 a. m. 
age 
for 24 
hours. 
7 a. m. 1 p. m. 7 p. m. 1 a. m. 
to to to to 
1 p. m. 7 p. m. 1 a. m. 7 a. m. 
REST EXPERIMENTS. 
E. 0., 9 experiments: 
Calo- 
rzzz 
2, 062 
2, 452 
2. 278 
2,226 
2, 348 
2. 279 
Calo- 
ries. 
94.5 
116.6 
103. 7 
111.6 
119.8 
114. 5 
104.8 
119.9 
109.0 
Calo- 
ries. 
90.4 
124.0 
105.0 
101.6 
106.9 
104.5 
93.5 
103.6 
98.7 
Calo- 
ries. 
83.9 
121.8 
101.8 
91.9 
94.3 
93.3 
80.0 
98.7 
88.2 
Calo- 
ries. 
62.8 
77.8 
69.2 
62.7 
70.4 
67.5 
58.1 
64.4 
60.2 
Calo- 
ries. 
85.9 
102. 2 
95.0 
Per 
cent. 
Per 
cent. 
Per 
cent. 
Per 
cent. 
33 
27.3 
27.7 
26.8 
18.2 
A. W. S., 1 experiment: 
92.8 
97.8 
3 
95.0 
86.0 
95.7 
89.0 
30.1 
27.5 
24.6 
17.8 
J. F. S., 3 experiments: 
2, 065 
2, 297 
9 
2.136 
30.6 
27.7 
24. S 16. 9 
Average of 13 ex- 
periments 
45 2,250 
105.5 103.7 
98.5 ' 67.3 93.8 
28.1 
27.7 26.3 17.9 
WORK EXPERIMENTS. 
E. 0., 2 experiments: 
3,473 
4,287 
3,829 
3,253 
195.3 
240. 5 
212.2 
192.8 
281.8 
231.5 
108.0 
128.8 
120. 5 
89.9 
111.0 
97.2 
68.8 
79.6 
74.0 
60.1 
144.7 
178.6 
160.0 
135.5 
8 
35.2. 
36.3 
18.9 
11.6 
J. F. S,, 4 experiments: 
187.8 185.5 
239. 9 '>41 . 3 
3,890 
70. 162. 1 
64.2 147.5 
12 
20 
3,540 212.0 216.7 
35.9 
36.7 
16.5 
10.9 
Average of 6 ex- 
periments 
3,050 212.0 222.5 
100.5 08.2 152.3 34.8 
1 
36.5 
17.5 
11.2 
From the quantities of heat given off from the body in the different 
periods of the day, as summarized in Table 150, it will be noted that 
in the 15 days of the 13 rest experiments with E. O., A. W. S., and 
J. F. S. the average amounts of heat given off per hour in the 1 suc- 
cessive 6-hour periods from 7 a. m. to 7. a. m. were 105.5, 103.7, 98.5, 
and 67.3 calories, respectively, the average hourly rate for the whole 
day being 93.8. The percentages of the whole amount for the day, 
