35 
manner 1 as the carbon, hydrogen, and water-free substance for each 
day: in other words, it is assumed to vary with the nitrogen and in 
the same relative proportion. 
Table 26. — Amount, specific gravity, and nitrogen of urine by six-hour jyeriods — Metab- 
olism experiment Xo. 13. 
Date. 
Period. 
Amount Specific 
of urine, gravity. 
1898. 
Nov. 
8- 9 
Grams. 
7 a. m. to 1 p. m 
1 p. m. to 7 p. m 
7 p. m. to 1 a. rn 
1 a. ni. to 7 a. ni 
1. 015 
1. 012 
Nitrogen content. 
Per cent. 
Gram*. 
5. 98 
6.24 
9-10 
10 
Total 
Total by composite. 
7 a. m. to 1 p. m 
1 p. m. to 7 p. m 
7 p. m. to 1 a. m 
1 a. m. to 7 a. m 
855. " . 
.70 
1. 65 
5.99 
175. 3 
1. 023 
2.89 
2,715.7 . 
21.10 
2,715.7 
1.012 
.77 
20. 91 
503.6 
550.5 
708.2 
223.8 
1.020 
1.017 
1.012 
1.018 
.91 
.96 
.82 
1.39 
4.58 
5. 29 
5.81 
3.11 
Total 
1,986.1 
1, 986. 1 
18.79 
1.013 ; 
.95 
18.87 
7 a. m. to 1 p. m _ 
524. 2 
405. 5 
647.7 
376.4 
1.014 
1.022 
1.014 
1.010 
.88 
1.27 
.91 
.79 
4.61 
10-11 
11 
5.90 
2.97 
Total 
1,953.8 
1,953.8 
18.63 
Total bv composite 
1. 015 
.95 
18. 56 
653.0 
374. 3 
403.0 
275.8 
1.013 
1. 022 
1.020 
1.017 
. 75 
1.33 
1.18 
1.22 
4.90 
1 p. m. to 7 p. m 
4.98 
11-12 
12 
4.75 
3.36 
Total 
1,706.1 
1, 706. 1 
17.99 
Total b v composite 
1.016 
1.05 
17.91 
Total, 4 davs, by periods 
76.51 
Composite, 4 davs 
8, 361. 7 
.90 
75. 26 
Table 27. — Daily elimination of carbon, hydrogen, water, and energy in urine — Metab- 
olism experiment Xo. 13. 
Date. 
Amount r .. Knn xt,-^™-^ -.»•-..,.- 
Heat of combustion. 
of urine. Carbon. Hjdrogen. 
Per gram. 
Total. 
N 
1898. 
jv.8-9 
9-10 
10-11 
11-12 
Grams. 
.... 2.715.7 
.... 1,986.1 
.... 1,953.8 
1,706.1 
P.ct. Grams. P.ct. Grams. 
16.38 4.6 
14. .58 4.1 
14.45 4.1 
13.96 3.9 
P. ct. Grams. 
2,629.2 
1,909.1 
1.877.5 
1,632.4 
Calorie. 
Calories. 
187 
166 
165 
159 
Total. 4 day- .... 
.... 8,361.7 0.71 59.37 0.20 16.7 
96.28 8,048.2 
0.081 i 677 
The amounts of carbon dioxid and water of respiration and perspi- 
ration during the different periods in this experiment are shown in 
Tables 28-30. There was but little condensation of water upon the 
ab>orbers and no "drip." 
1 r. s. Dept. Agr., < ufice of Experiment Stations Bui. 60, p. 35. 
