23 
measured directly with that given off by the subject. A cyclometer 
registered the number of miles that would have been covered by the 
same number of revolutions of the wheel, but the amount of work 
done could hardly have been as large as would be required to propel a 
bicycle the number of miles thus recorded. It will be observed from 
the figures in Table 8 that there was considerable difference in the 
amount of work done on the different days of the study. 
Table 8. — Record of work done — Metabolism experiment No. 11. 
Time. 
(a) 
Cyclom- Nam- Actual 
"eter ber of duration 
reading, miles, of work. 
(6) 
Rate. 
(c) 
Heat 
equiva- 
lent, 
axbx 
0.2378 
Mar. 22. 8.20 a. m 
Total 
1898. 
Seconds. Watts. Calories. 
10.20 a. m 
- 
12.40 p. m 
3.50 p. ru 
6.00 p. m 
Mar. 23, 8.20 a. m 
10.20 a. in 
12.30 p. m 
3.50 p. m 
6.00 p. m 
Mar. 24, 8.20 a. m 
10.20 a. m 
12.30 p. m 
3.50 p. m 
6.00 p. m 
Mar. 25, 8.20 a. m 
10.20 a. m 
12.30 p. m 
6.00 D. m 
154 
182 
210 
238 
266 
266 
294 
415 
415 
447 
479 
7.200 
7.200 
7.200 
479 
514 
551 
588 
644 
0) 
28 7,200 
28 7,200 ,1 
43 7,200 J 
7,200 | 
7,200 J 
7.200 
7,200 
7, 200 
7,200 
7.200 
7,200 
7,200 
7,200 
32 
25 
91 I 
22 
26 
25 
89 
85 
103 
140 
1 Cyclometer not working. 
Detailed data of Income and outgo. — The quantities of nutrients in 
the food consumed each da}' and the quantities rejected in the feces 
are shown in Tables 9 and 10. It will be observed by comparison with 
the results of some of the rest experiments reported in preceding 
bulletins, that, while the protein is practically the same as in these 
rest experiments, the energy in the food has been increased more than 
800 calories per day in order to supply the necessary energy for the 
increased muscular activity. It was quite interesting to note that with 
