135 
In the rest experiments with E. O. the total amount of water of 
respiration and perspiration per day ranged from 697 to 1,212, and 
averaged 977 grams. Comparing the 12 hours of the day with the 12 
hours of the night the amounts of water eliminated were practically 
the same, being, respectively. 49.7 and 50.3 per cent of the whole. 
Comparing by periods the largest elimination, 13.7 grams per hour, 
was in the first night period (7 p. m. to 1 a. m.) and the smaller. 38.2 
grams per hour, in the last night period (1 a. m. to 7 a. m.). but the 
differences in the different periods were not large. The amounts with 
A. W. S. were somewhat smaller, the average daily elimination being 
859 grams. Here, again, it was equally divided between the day and 
the night, and the amounts in the 6-hour periods differed but little. 
although the amount in the first night period was slightly larger than 
that in the second night period, the latter being little smaller than 
in either of the day periods, as was the case with E. O. The average 
daily elimination with J. F. S.. 830 grams, was still less than with 
A. W. S. In this case the elimination was somewhat larger during 
the day than during the night periods, being 52 per cent of the whole 
for the former as compared with 48 per cent for the latter. The aver- 
age for both the day periods was the same. 36 grams. As was the case 
with the two other subjects, the average for the first night period was 
larger than that for the second. Taking the rest of the experiments 
with the 3 subjects together the daily average for 15 days was 939 
grams, or 39.1 grams per hour. The amounts per hour in the 1 
periods were, respectively. 38.3. 10.3. 11.6. and 36.1 grams, or 21.5. 
25.7, 26.6. and 23.2 per cent of the total for the day. 
In the work experiments in which the subjects E. O. and J. F. S. 
were engaged in active muscular work 8 hours each day between 7 
a. m. and 7 p. m.. the average daily outgo of water through lungs and 
skin was increased to 1.912 grams per day. With E. O. this increase 
is noticeable in all 4 periods, but is especially marked in the first day 
period, the average in that period being 3 times as great in the work 
as in the rest experiment. In the majority of cases the amount grad- 
ually fell off during the subsequent periods: but even during the last 
night period the average was nearly If times as large for the work as 
for the rest experiments. Of the total daily amount 60.3 per cent 
was given off during the two day periods, and 39.7 per cent during 
the two night periods. With J. F. S. there was an increase in elim- 
ination during the day periods only, being most noticeable in the 
second, in which it was 3 times as large in the work as in the rest 
experiments. The elimination during the night periods was practi- 
cally the same in the work as in the rest experiments. Of the total 
daily amount eliminated by this subject in the work experiments 75.5 
per cent was given off during the two day periods and 21.5 per cent 
during the two night periods. In the average of the experiments 
