OF UEEA AND TJEINAET WATEE. 
831 
daily to the end of the week, with regular work, from 574 grs. on Sunday, to 460 grs. on 
Friday; but this varied with the amount of labour and the dependent conditions. 
11. The weight of the body after the emission of urine was the greatest on the 
Simday, including the Sunday night, and increased from the Saturday from 1 lb. 6 oz. 
to 2 lb. 3 oz. It decreased progressively during a week of regular labom-, but increased 
on any day with rest. 
12. The sohd ingesta, on the average of four months, was between 364- and 37^ oz. 
on each week day, but on Simday it was 41f oz. The total solid and fluid ingesta were 
95f oz. on Sunday, and from SO-j- oz. to 95 oz. on the week days. 
13. The quantity of urea eliminated increased in the summer; and, on the average, 
from May to October inclusive it was 570T grs., and from October to April inclusive 
480 ’5 grs. daily. The increase from March to the maximum in August and September 
was 36 per cent, of the former; and the succeeding decrease to March was 29 per cent, 
of the maximum. The difference between the maximum and minimum was 46 T per 
cent, of the latter. 
14. The elimination of urinary water followed the same course, and was 55 '7 fl. oz. 
in the wann, and 51 ‘9 fl. oz. in the cold half of the year. The excess of the maximum 
over the minimum quantity was 40 '2 per cent, of the latter. 
15. The elimination of urea increased with increase of temperature and barometric 
elevation, but it occurred usually on the second day. When the direction of the two 
influences w’as different, they neutralized each other. The proportions of urea to one 
degree of temperature, in the two seasons of the year, were nearly identical, viz. 10’ 36 grs. 
in the hot, and 10'9 grs. in the cold season. The months of marked increase and de- 
crease of temperature were those of marked increase and decrease in the elimination of 
urea. The proportions of urea to one degree of temperature in the two highest and the 
two lowest months were the same, idz. 11 ’5 and 11 ‘8 grs. 
The elimination of urine increased with sudden cold, and decreased with sudden 
warmth on the same day, and then oscillated to maintain the necessary equilibrium of 
the fluids in the body. 
16. [There are variations in the quantities according to the conditions of each year; 
but the seasonal-conditions progression remains the same. It is now important to 
ascertain the influence of the several conditions attending a temporary summer residence 
at the sea-side, in reference to the increase of urea which then occurs.] 
17. With the labour of the treadwheel there was no increase in the elimination of 
urea in one hour and ten minutes before breakfast, but an average decrease of 2’4 grs. 
per hour. There was an increase on the whole day over the day of routine labour of 
16 grs., and over the Sundays of 34 grs. per day. The increase of the former was 3 per 
cent. The prisoners lifted from 354-81 to 413-89 tons through 1 foot per day, with 
treadwheel labour. The increase occurred on the treadwheel day alone, except in a few ' 
instances, when, with meteorological disturbances, it was deferred to the second day in 
two cases ; and then by the necessary alternations the largest excretion occurred on the 
days of rest, \iz. on the alternate days. 
