137 
Table 147. — Carbon dioxid eliminated by lungs and skin — Amounts per day, and rates 
and proportions in different jieriods. 
If 
00 & 
OS 0> 
p 

-4-2 
Is 
O 
Kate per hour. 
Proportion of total for 24 
hours. 
•Subject and kind of 
experiment. 
Day periods. 
Night periods. 
Aver- 
age 
for 24 
hours. 
Day periods. 
Night periods. 
7 a.m. 
to 
1p.m. 
1p.m. 
to 
7 p.m. 
7p.m. 
to 
1a.m. 
1a.m. 
to 
7 a.m. 
7 a.m. 
to 
1p.m. 
1p.m. 
to 
7p.m. 
7 p.m. 
to 
1a.m. 
1a.m. 
to 
7a.m. 
REST EXPERIMENTS. 
E.4 >., 9 experiments: 
Gram* Gram* 
739 32.7 
879 43.2 
Grams 
33.2 
42.8 
Grams 
31.2 
42.2 
36.2 
30.9 
33.7 
32.8 
28. 1 
36. 3 
31 fi 
Grams 
20.4 
25.6 
22. 3 
21.8 
24.3 
23. 2 
21.2 
23.3 
22. 3 
Grams 
30.8 
36.6 
33.9 
32.8 
34.0 
33.2 
29.8 
33.4 
31.8 
Per. ct. 
Per. ct. Per.ct. 
Per. ct. 
33 
803 37.9 37.4 
28. 3 
28. 27. 1 
16.6 
A. W. S.. 1 experiment: 
787 38. 1 
816 41.5 
797 39. 8 
35.9 
38.2 
37.1 
33. 2 
40 1 
Average 
3 
29.9 
27.9 24.7 
17.5 
J. F. S.,3 experiments: 
715 33.4 
801 39.7 
9 
762 37 fl Rfi 1 
29.1 
28.4 24.9 
17.6 
Average of 13 ex- 
periments 
WORK EXPERIMENTS. 
E. 0. . 2 experiments: 
Minimum 
! — ~ I 
45 j 794 37. s 
37.2 
35. 
22.4 
33.1 ; 28.6 
28.1 , 26.4 
16.9 
1,195 69.4 
1,510 : 90.2 
1,316 78.4 
1,080 63 4 
65.0 
98.2 
79.5 
33.9 
42. 2 
38.4 
27.8 
36.2 
31.3 
19.9 
26.2 
23.1 
21.0 
24.1 
22.3 
49.8 
62.9 
54.8 
45.0 
53.9 
50.5 
Average 8 
J. F. S.,4 experiments: 
35. 7 36. 3 
17.5 
10.5 
^r 
1,292 81.0 79 « 
Average 
Average of 6 ex- 
periments 
12 
1,212 73.6 
74.7 
36.5 37.0 15.5 
11.0 
20 
1,253 75.5 
76.6 
34.1 
22. 6 
52. 2 
36.2 36.7 16.3 
10.8 
The elimination of carbon dioxid under conditions of rest averaged 
803 grams per day, or 33.9 grams per hour, in the 33 experimental 
days of the 9 experiments with E. O.; 797 grams per day, or 33.2 
grams per hour, in the 3 experimental days of one experiment with 
A. W. S., and 762 grams per day, or 31.8 grams per hour in the 9 
experimental days of 3 experiments with J. F. S. The range was 
from 739 to 879 grams per day with E. O., from 787 to 816 with 
A. W. S., and from 715 to 801 with J. F. S. It will be remembered, 
however, that the experiments with E. O. were made at different 
times during two } r ears, while those with A. W. S. were in a single 
experiment. Those with J. F. S. were made at short intervals during 
the same year. In 8 experimental days of the 2 experiments in which 
the subject E. O. was engaged in active muscular work for 8 hours 
each day the output averaged 1,316 grams per day, or 51.8 grams per 
hour, while in 12 experimental days in which the subject J. F. S. was 
similarly engaged it was 1,212 grams per day, or 50.5 grams per hour. 
