124 STORRS AGRICULTURAL EXPERIMENT STATION. 
day being 94.1. The percentages of the whole amount for the 
day given off in the several periods are 27.4, 27.6, 26.7, and 
18.3, respectively. 
The average hourly rate for the twenty days of the six work 
experiments with E. O. and J. F. S. was 152.3 calories. The 
rates for the different periods beginning with 7 A. M. were 
212.0, 222.5, 106.5, and 68.2 calories, respectively. The corre- 
sponding percentages are 34.8, 36.5, 17-5; arid (1 1a 
It thus appears that for the two day periods in which the 
subjects were engaged in active muscular exercise for eight 
hours the quantity of heat given off was more than twice as’ 
large as in the corresponding periods of the rest experiments. 
In the first night period the amount per hour in the work 
experiments was not greatly in excess of that in the. rest 
experiments (106.5 calories as compared with 97.5). In the 
second night period the quantities were more nearly the same 
(68.2 calories in the work experiments and 66.5 in the rest 
experiments). 
The uniformity in the amounts of heat given off duane the 
second night period calls for special notice. In the rest experi- 
ments with E. O., covering twenty-five days, the range is from 
62.8 to 77.8 and the average 68.7 calories per hour; in the 
experiment with A. W.5., covering three days, the range per 
hour is from 62.7 to 70.4 and the average 67.5 calories. In 
the twelve days of the work experiments with EH. O. the 
amounts are a little larger than in the rest experiments with 
the same subject, ranging from 68.8 to 79.6 and averaging 74.0 
calories per hour. That the elimination of heat during this 
period is larger in the work than in the rest experiments 
is perhaps explained by the fact that while the subject was 
decidedly tired at night, and supposed that he slept more 
soundly than in the rest experiments, he moved more, and to 
the observers outside the chamber appeared more restless. In 
the work experiments with J. F. S. also the amounts during 
this period are slightly larger than in the rest experiments, 
ranging from 60.1 to 70.0 and averaging 64.2 calories per 
hour. It is noticeable that in the second night period the rate 
with J. F. S. is smaller than that with E. O., the ratio of the 
former to the latter being about the same in both work and 
rest experinients. 3 
