1066 
Journal of Agricultural Research 
Vol. XXXI, No. 11 
Table X. — Loss as hair and scurf per day 
Experiment, animal, and period Nos. 
Dry 
matter 
Nitrogen 
Carbon 
Energy 
221D-885-I________ 
Grams 
13.9 
Grams 
1. 3 
Grams 
6.1 
Calories 
65.9 
81.5 
II____ 
16. 7 
1.9 
7. 5 
HI____ 
14.9 
1.8 
6.5 
71. 5 
221D-886-I______ 
«12.1 
• 1.2 
« 5.4‘ 
* 69.1 
II_____ 
14.1 
1.3 
6. 2 
67.0 
III______ 
10.1 
1.1 
4. 7 
51.1 
221E-885-I______ 
15.2 
1. 2 
6. 0 
64.2 
II___ 
11.0 
1.2 
4. 6 
50.0 
221F-874-I_____ 
11.6 
1.1 
5.1 
56.0 
II____ 
11.8 
1.1 
5. 2 
57.2 
221F-887-I__—____ 
13.3 
1.4 
6.2 
68.1 
II_____ 
11.8 
1.2 
5.0 
55.9 
« Average of Periods II and III, cow 886. 
THE GASEOUS EXCRETA 
With the animals in the respiration calorimeter the carbon dioxide, 
methane, and water vapor excreted were determined by methods 
which have been described in previous publications of the institute. 
The data so obtained for this series of experiments are presented in 
Table XI. It will be noted that the ratio of carbon to hydrogen in 
the combustible gases excreted by these cows was quite variable. 
This was in part due to the difficulty experienced in the determination 
of the hydrogen. However, there was on the average an excess of 
hydrogen to the amount theoretically required to unite with the 
carbon to form methane. This finding is borne out by subsequent 
unpublished experiments, but the variability of the results, due to 
imperfections in the hydrogen estimation, is such as to render im¬ 
possible definite interpretation of this apparent excess of hydrogen. 
In experiment 221D-886-I an accident to the apparatus rendered 
the completion of th,e two-day period impossible, and the data 
recorded are for one day only. 
Table XI. — Carbon, hydrogen , and water vapor in daily gaseou§ excreta ° 
Experiment, animal, and 
period Nos. 
Water 
Carbon 
dioxide 
Carbon b 
Hydrocarbons 
Ratio of 
carbon to 
hydrogen 
vapor 
Hydrogen 
Carbon 
Methane 0 
( 1 ) 
Grams 
Grams 
Grams 
Grams 
Grams 
Grams 
221D-885-I_ 
4,866.7 
3,360.9 
916.5 
26.0 
70.2 
93.7 
2.700 
II.__ 
6,544.4 
4,067.6 
1,109.2 
31.3 
101.3 
135.4 
3.236 
III_ 
5,130.5 
3,695.8 
1,007.8 
29.7 
88.2 
117.8 
2.970 
221D-886-I d _ 
4,213.3 
3,440.0 
, 938.1 
31.2 
81.7 
109.2 
2.619 
II_ 
6,932.0 
4,720.7 
1,287.3 
39.9 
115.9 
154.9 
2.905 
III_ 
3,726.8 
3,409.0 
929.6 
29.1 
85.1 
113.8 
2.924 
221E-885-I_ 
6, 568.9 
3,940.0 
1,074.4 
41.1 
91.0 
121.6 
2.214 
II__ 
4,886.3 
3,515.5 
958.7 
31.6 
78.3 
104.6 
2.478 
221F-874 I_ 
5,851.7. 
4,034.8 
4,881.6 
1,331.2 
41.4 
118.1 
157.8 
2.853 
II_ 
3,808.8 
1,038.7 
29.4 
86.0 
114.9, 
2.925 
221F-887-I...__ 
5,309.5 
4,549.1 
"1,240.5 
38.1 
114.2 
152.6 
2.997 
II__ 
3,256.9 
3, 521.8 
960.4 
28.1 
„ 80.7,. 
U- - " » 
♦ 107.9, 
2.872 
(/ % 
® Corrected for man entering chamber to make adjustments. 
b Computed from CO 2 , grams CO 2 X 0.2727. 
c Computed from carbon in hydrocarbons. 
d One-day experiment. 
