54 
Table 57. — Daily elimination of carbon, hydrogen, water, and energy in urine — Metab- 
olism experiment No. 21. 
Date. 
Amount 
of urine. 
Heat of combus- 
tion. 
Per 
grain. 
Total. 
1899. 
Feb. 12-13 
Grams. 
1, 680. 9 
1,748.1 
1,965.3 
P.ct. 
Gram*. 
10.18 
11.34 
10. 85 
P.ct. 
Grams. P.ct. 
2.89 
3.21 
3.07 
Grnms. 
1,628.3 
1,689.5 
1.909.3 
Calorie. 
Calories. 
119 
13-14 
132 
14-15 
127 
Total, 3 days 
5. 394. 3 ' 0. 60 32. 37 0. 17 9. 17 96. 9 
5, 227. 1 
0.070 
378 
The details of the measurements of carbon dioxid and water in the 
ventilating air current are shown in Tables 58-60, which follow. 
Table 58. — Comparison of residual amounts of carbon dioxid and water in the chamber at 
the beginning and end of each period, and the corresponding gain or loss — Metabolism 
experiment Xo. 21. 
End of period. 
Carbon dioxid. 
Water. 
Date. 
Total 
amount 
in 
chamber. 
Gain( + ) 
or 
loss (-) 
over pre- 
ceding 
period. 
Total 
amount 
of vapor 
remain- 
ing in 
chamber. 
Gain( + ) 
or 
loss ( — ) 
over pre- 
ceding 
period. 
Change 
in 
weight 
of ab- 
sorbers, 
gain( + ) 
or 
1— ,. 
Total 
amount 
gained 
( + )or 
lost(-) 
during 
the 
period. 
1899. 
Feb 12-13 
Grams. 
32.7 
37.4 
42.5 
29.1 
27.4 
Grams. 
Grams. 
38.1 
38.6 
40.3 
38.6 
35.0 
Grams. 
Grams. 
<irams. 
1 p. m 

+ 4.7 
+ 5.1 
-13.4 
- 1.7 
- .5 
+ 1.7 
- 1.7 
- 3.6 
+ .5 
7 p.m 
+ 1.7 
1 a. m 
- 1.7 
- 3. 6 
Total 
- 5.3 
- 3.1 
-31 

13 14 
38.5 
45.8 
33. 9 
28.7 
+ 11.1 
+ 7.3 
-11.9 
- 5.2 
41.6 
43.3 
41.0 
35.0 
- 6.6 
+ 1.7 
- 2.3 
- 6.0 
-1 
-1 
-+- 5.6 
+ .7 
- 2.3 
- 6.0 
Total 
+ 1.3 

— 2 
-2.0 
lp.m 
14-15 
46. 7 
44.0 
29.3 
25.7 
+ 18.0 
- 2.7 
-14.7 
- 3.6 
45.0 
44.9 
41.6 
35.7 
+10.0 
- .1 
- 3.3 
- 5.9 
-1 
+ 11.0 
- .1 
1 a. m 
- 3.3 
- 5.9 
Total 
— 3.0 
+ .7 
+ 1 
+ 1.7 
