66 
MUSCULAR WORK 
Table 79. — 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. 
Mar. 14, 1912. 
Severe work: 
8>> 47» a.m.i 
9 13 a.m. 2 
9 37 a.m.' 
Light work: 
10k 22™ a.m.* 
10 48 a.m. 6 
11 10 a.m. 6 
min. sec. 
11 41 
11 37 
11 37 
13 30 
13 06 
13 18 
c.c. 
1,376 
1,395 
1,392 
678 
685 
685 
c.c. 
1,550 
1,526 
1,559 
833 
787 
833 
0.89 
.92 
.89 
.82 
.87 
.82 
112 
110 
107 
87 
87 
86 
24 
22 
24 
24 
24 
22 
amp. 
1.5 
1.5 
1.5 
0.5 
0.5 
0.5 
70.8 
70.9 
70.9 
70.1 
70.8 
70.1 
1 The starting records were lost. There was the usual preliminary period, however, and it is probable that 
the speed was about 70 revolutions per minute. During the period sweating was marked though not 
profuse. 
2 In the interval before this period the average speed was 71 revolutions per minute. 
3 In the interval before this period the average speed was 74 revolutions per minute. 
4 In the interval between this period and the preceding period the average speed was 69 revolutions per minute. 
The current was decreased to 0.5 ampere at 10 h 10 m a.m. Some oxygen was lost by leak during the 
period. The loss was estimated. 
5 In the interval before this period the average speed was 59 revolutions per minute. 
6 In the interval before this period the average speed was 68 revolutions per minute. The subject on this day 
had his usual trouble in changing from high to low resistance. He complained that it was extremely 
difficult to work as efficiently. 
Table 80. — Results with subject M. A. M. (without food) . 
experiment. 
Continuous work — fatigue 
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. 
Mar. 15, 1912. 
Work: 
9 h 00»» a.m.i 
9 45 a.m. 2 
10 30 a.m.' 
11 15 a.m.* 
12 00 noon 6 
12 45 p.m. 6 
min. sec. 
10 41 
10 38 
10 41 
10 40 
10 15 
6 55 
c.c. 
1,771 
1,766 
1,755 
1,741 
1,948 
1,670 
c.c. 
1,967 
1,946 
1,969 
1,948 
2,003 
1,899 
0.90 
.91 
.89 
.89 
.97 
.88 
129 
128 
136 
156 
160 
30 
32 
30 
36 
36 
amp. 
1.5 
1.5 
1.5 
1.5 
1.5 
1.5 
91.3 
91.4 
91.7 
90.3 
89.0 
78.2 
1 Work was begun at 8 h 30 m a.m., the average speed from 8 h 30 m a.m. to 9 h a.m. being 86 revolutions per 
minute. During the period the work was easily done. Perspiration was marked though not very 
profuse. 
2 The average speed in the interval before this period was 87 revolutions per minute. During the period the 
work was done very easily. Perspiration was not very profuse. 
3 The average speed in the interval before this period was 91 revolutions per minute. During the period the 
work was still done easily. Perspiration was perhaps a little more profuse. 
4 The average speed in the interval before this period was 84 revolutions per minute. During the period 
the work was not done so easily. It seemed to require a little more effort to keep up to the rate of 90 
revolutions per minute. 
6 The average speed in the interval before this period was 82 revolutions per minute. During the period 
the subject was much distressed. The observer thought he was about to give up several times, but each 
time he seemed to make a fresh effort. Perspiration was profuse. 
6 The average speed in the interval before this period was 79 revolutions per minute. The subject did not 
look well at the beginning of this last period, but insisted he was all right. He kept his lips tightly on 
the mouthpiece. The rate of riding fell off steadily. At the end the subject looked exhausted and ad- 
mitted that he was. He swayed when he released his mouth from the mouthpiece. He spoke of a 
constant struggle for breath, but that he was unable to help himself. An analysis of the air in the 
system at the end of the whole series of periods showed that the oxygen present was 22.5 per cent. 
The subject drank 30 c.c. of water after the end of each period except the first. The entire duration 
of work was from 8 h 30 m a.m. to 12 h 52 m p.m., or 4 hours and 22 minutes. The total number of revolu- 
tions was 22,482, the average speed per minute being 85.8 revolutions. 
