
228 STORRS AGRICULTURAL EXPERIMENT STATION. 
and the nitrogen, carbon and hydrogen and the heat of combus- 
tion of the dried residue are determined. ‘he methods of dry- 
ing by which transformation of urea into ammonium carbonate 
and loss of the latter may be avoided or properly allowed for, 
have been made the subjects of special experimental study, the 
results of which will be published later. 
The heats of combustion of food materials and excretory 
products are made by use of the bomb calorimeter described 
in the previous article of this Report. 
Daily routine of the experiment.—As above stated each experi- 
ment is divided into two periods. In the first or preliminary 
period, of four days, the analyses of feces and urine are made, 
the data thus sufficing for a digestion and nitrogen metabolism 
experiment. On the evening of the fourth day the subject 
enters the respiration chamber, though the actual respiration 
calorimeter experiment does not begin until 7 o'clock the morn- 
ing of the fifth day. The night sojourn in the apparatus suf- 
fices to get the temperature of the air in the apparatus and its 
content of carbonic acid and water into equilibrium so that 
accurate measurements may begin with the morning of the 
fifth day and continue until 7 o’clock on the morning of the 
ninth day, thus making the duration of this experiment exactly 
four days. The routine of each day is illustrated by the 
accompanying program which was prepared and used for 
experiment No. 6. The man weighs himself on a small Fair- 
banks platform scale, especially made for the purpose and 
sensitive to 5 grams. | 
Daily program of metabolism experiment No. 6 , May, 1897. 
7:00 A. M.—Rise, 
Pass urine. 
Weigh self, stripped and dressed. 
7:45 A. M.—Breakfast. 
Weigh self. 
8:20 A. M.—Begin work. 
10:20 A. M.—Ten minutes’ rest. 
10:30 A, M.—Weigh self. Drink 200 grams water. 
12:30 P. M.—Stop work, | 
1:00 P. M.—Pass urine. 
Weigh self. 
I:I5 P. M.—Danner, 
Drink 200 grams water. 
Weigh self. 




