50 
MUSCULAR WORK 
Table 41. — Results with subject M. A. M. (without food). 
Date and time. 
Duration. 
Carbon 
dioxide 
eliminated 
per minute. 
Oxygen 
absorbed 
per 
minute. 
Respira- 
tory 
quotient. 
Aver- 
age 
pulse- 
rate. 
Average 
respira- 
tion-rate. 
Cur- 
rent. 
Revolu- 
tions per 
minute. 
Dec. 22, 1911.1 
Lying: 
8" 27™ a.m.* 
8 47 a.m 
Work: 
10 h 20 m a.m.* 
10 39 a.m.* 
Lying: 
10 h 59 m a.m.« 
11 21 a.m 
11 41 a.m 
min. sec. 
14 25 
14 22 
14 25 
10 12 
10 13 
14 24 
14 29 
14 24 
c.c. 
199 
195 
188 
1,030 
1,077 
225 
197 
198 
c.c. 
229 
217 
229 
1,326 
1,355 
253 
238 
228 
0.87 
.90 
.82 
.78 
.80 
.89 
.83 
.87 
61 
60 
60 
116 
119 
70 
64 
62 
20 
20 
20 
22 
24 
22 
20 
20 
amp. 
0.9 
0.9 
«58 
♦58 
1 The rectal thermometer was used during this entire experiment. During work there was a maximum rise 
of about 1.2° C. in the body-temperature; during the lying periods following the work periods it fell 
steadily to the temperature at the beginning of the day. (See Fig. 10, p. 158.) 
2 The subject lay down at 7 h 57 m a.m. The pulse-rate at 8 h 10™ a.m. was 66; at 8 h 20™ a.m., 61; at 8 h 22™ 
a.m., 60. 
3 The windows were opened, and the subject rode rapidly from 9 h 28™ a.m. to 9 h 53 m a.m. The speed during 
this rapid riding was probably about the same as on Dec. 21. At 9 h 53™ a.m. the speed was reduced 
to 60 revolutions per minute. The pulse-rate at 9 h 57 m a.m. was 120; at 10 h 04 m a.m., 122; at 10 h OS™ 
a.m., 120. The measurement of the metabolism was attempted at 10 h 10 m a.m. but the subject stopped 
work after 1£ minutes. He said he could not continue because of the great pressure from the rubber 
cap on the tension-equalizer which affected his expiration. The pulse-rate was 112 at 10 h 10 m a.m. 
There was no flushing to speak of. There was considerable perspiration, but this was due to the pre- 
vious exercise. The subject stopped pedaling for about 3 minutes and said he was much exhausted. 
He had very labored breathing. During the period which was successfully carried out between 10 h 20 m 
a.m. and 10 h 30 m a.m., the test for carbon dioxide in the circuit was positive. The amount of carbon 
dioxide present was small, but the blower was run for 3 minutes after the period to clear it out. 
* Approximate. The metronome was used in both work periods and during the interval between the two 
periods to regulate the speed. 
5 The subject worked steadily and evenly. 
8 The subject lay down at 10 h 50™ a.m. 
Table 42. — Results with subject M. A. M. (without food). 
Date and time. 
Duration. 
Carbon 
dioxide 
eliminated 
per minute. 
Oxygen 
absorbed 
per 
minute. 
Respira- 
tory 
quotient. 
Aver- 
age 
pulse- 
rate. 
Average 
respira- 
tion-rate. 
Cur- 
rent. 
Revolu- 
tions per 
minute. 
Jan. 2, 1912.1 
Lying: 
8b 49m a .m.» 
9 11 a.m 
Work: 
10 h 14m a.m.' 
10 34 a.m.e 
Lying: 
10 h 54" a.m.* 
11 18 a.m 
11 40 a.m.? 
min. sec. 
14 29 
14 36 
10 29 
10 08 
14 54 
16 50 
18 21 
c.c. 
198 
200 
1,033 
1,059 
223 
208 
217 
c.c. 
231 
232 
1,254 
1,244 
271 
257 
270 
0.86 
.87 
.83 
.85 
.83 
.81 
.81 
60 
61 
129 
129 
81 
79 
75 
16 
19 
23 
25 
24 
23 
21 
amp. 
0.9 
0.9 
'60 
<60 
1 See table 43 for experiment on Jan. 1, 1912. 
2 Before the experiment the subject complained of a heavy feeling in his stomach. It was possibly due to 
the fatty supper of the night before. He looked well. The pulse-rate at 8 h 10™ a.m. was 68; at 8 h 20™ 
a.m., 63; at 8 h 42™ a.m., 62. 
3 Beginning at 9 h 31™ a.m., the subject rode rapidly for 25 minutes at the average rate of 110 revolutions 
per minute. At 9 h 56™ a.m. the speed was lowered to 60 revolutions per minute. The pulse-rate 
after the speed was decreased was at 10 h 01 m a.m., 134; at 10 h 04™ a.m. and 10 h 07 m a.m., 130; at 10 h 09™ 
a.m., 132. The subject washed his mouth by gargling with water at 10 h 07 m a.m. He said then that 
he could start all over again with ease. 
* Approximate. The metronome set at 60 was used to regulate the speed from 9 h 56 m a.m. to the end of work. 
6 The subject was in excellent condition and had no difficulty in doing the work. There was a tendency in 
both periods for him to fall off from the set rate of 60 revolutions per minute. 
6 The subject lay down at 10 h 45™ a.m. 
7 The subject moved actively for about 10 seconds at ll h 51™ a.m. 
