217 



10. The -weight of the body was greatest oft the Sunday, And 

 lessened through a week of regular bodily exertion, but varied as 

 the food and exertion varied. There were variations of several 

 pounds recorded in each week. 



1 1 . The average weight of the. solid ingesta during four months 

 was 37 oz. in the week-day, and 4 If oz. on the Sunday; whilst the 

 average weight of both fluid and solid ingesta was from 89? oz. to 

 95 oz., and 95f oz. at the same period. 



12. The largest average elimination of urea and urinary water 

 occurred from May to October (viz. 570 grs. and 480 grs. of urea), 

 and the excess of the maximum over the minimum was 46' 1 and 

 40*2 per cent. 



13. The effect of temperature and atmospheric pressure was direct, 

 and increased the elimination of urea and urinary water ; but the 

 former increase was commonly found on the succeeding day. When 

 the two acted in the same direction, the common effect was increased ; 

 but when they were opposed they disturbed the result. Sudden 

 increase of temperature lessened, and sudden cold increased the eli- 

 mination of urea. 



14. Treadwheel labour caused an increased elimination of 19 grs. 

 of urea over that of days of routine labour, and 34 grains over that 

 of the Sundays ; but, in addition, the rate of elimination of urea to 

 body weight was very high ; viz. 4'39 to 4'74 grs. per Ib. 



The labour of the treadwheel was equal to lifting 354 to 413 tons 

 through 1 foot per day, or to walking about 29 miles daily. Some- 

 times the effect upon the urea was deferred until the following day. 



15. Unusual and additional food always increase the elimination 

 of urea ; and, with headache and stomach derangement, there was 

 commonly a temporary diminution in the excretion. 



16. Tea, coffee, and alcohol, given to the prisoners, temporarily 

 lessened the excretion of urea and urinary water, tea having the great- 

 est effect upon the urea, and alcohol upon the urinary water ; but 

 this effect lessened after the first or second day. Tea increased the 

 evolution of chloride of sodium, and alcohol decreased it proportion- 

 ally with the urine. 



1 7. When | oz. of chloride of sodium was withheld from the food, 

 the same quantity was absent in the urine. 



18. The amount of foeces was very large in the prisoners (8 '55 oz. 



