1060 
Journal of Agricultural Research 
Vol. XXXI, No. 11 
Table IV .—Composition of the dry matter of the dung alone 
Non- 
pro¬ 
tein b 
Nitro- 
Total 
nitrogen 
Carbon 
Energy 
per 
gram 
Experiment, animal, 
and period Nos. 
Ash 
Pro¬ 
tein ° 
Crude 
fiber 
gen- 
fiee 
extract 
Ether 
extract 
From 
fresh 
sub¬ 
stance 6 
From 
air-dry 
sub¬ 
stance 
From 
fresh 
sub¬ 
stance 
From 
air-dry 
sub¬ 
stance 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Calories 
221D-885-I_ 
11.88 
10.23 
1.95 
37.52 
35.95 
2. 48 
2.05 
2.00 
(<0 
46.67 
4.66491 
II. .. 
12.40 
11.53 
2.15 
36.34 
35.30 
2. 29 
2.30 
2.09 
(*) 
46.69 
4.68633 
Ill_ 
12.27 
10.61 
2.05 
37.71 
34.96 
2.39 
2.13 
2.07 
(*) 
46.59 
4. 68649 
221D-886-I.. 
12.42 
9.72 
1.98 
38.48 
34. 78 
2.63 
1. 98 
1.89 
( e ) 
46. 51 
4. 62183 
II_ 
12.89 
10.71 
2.54 
35.05 
36.26 
2.55 
2.25 
2.11 
(*) 
46.10 
4. 56661 
III_ 
12.41 
11.28 
2.03 
36.93 
34.86 
2.51 
2.24 
2 . 22 
(°) 
46.28 
4.63401 
221E-885-I.. 
11.26 
10.12 
1. 50 
38.04 
36. 94 
2.15 
1.94 
1 . 80 
(•) 
46.84 
4. 69723 
II_ 
11.78 
11. 56 
0.91 
37.11 
36.58 
2.06 
2.04 
1.97 
(*) 
46.28 
4.63002 
221F-874-I.. 
11.28 
10.86 
1.66 
34.79 
39.03 
2.37 
2.09 
2.00 
48.00 
46. 95 
4. 70966 
II.. 
12.19 
10.16 
1.69 
35.42 
38.16 
2.39 
1. 93 
1.99 
47.23 
46.02 
4.69322 
22IF-887-I.. 
11.33 
10.24 
3.29 
31.90 
40.99 
2.25 
2.34 
1.97 
49.20 
45.82 
4.69662 
II_ 
11.06 
10.21 
2.51 
38. 67 
35.40 
2.16 
2.17 
1.93 
48.05 
46.16 
4.68011 
° True protein; A. O. A. C. method. b Nonprotein, NX4.7. 6 By Konig’s method. 
d No determinations of carbon in the fresh substance were made prior to experiment 221F. 
* By direct combustion of the fresh material. 
Table V .—Composition of the dry matter of the dung and urine mixture 
Non- 
pro¬ 
tein * 
Nitro¬ 
Total 
nitrogen 
Carbon 
Energy 
per 
gram 
Experiment, animal, 
and period Nos. 
Ash 
Pro¬ 
tein « 
Crude 
fiber 
gen- 
free 
extract 
Ether 
extract 
i 
From 
fresh 
sub¬ 
stance® 
From 
air-dry 
sub¬ 
stance 
From 
fresh 
sub¬ 
stance 
From 
air-dry 
sub¬ 
stance 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Per 
cent 
Calories 
221D-885-I.. 
18.46 
8.98 
26.28 
30.46 
13.41 
2.42 
7.25 
3.21 
(O 
43.24 
4.39446 
II_ 
17.24 
9.36 
23.30 
29.97 
17.64 
2.49 
6.66 
2.88 
( d ) 
43.72 
4.41033 
III_ 
19.22 
9.21 
24.28 
28.25 
16.30 
2.74 
6.85 
3.00 
( d ) 
42.89 
4. 33180 
221D-886-I_ 
17.43 
8.84 
22.38 
29.81 
18.54 
3.00 
6.38 
2.81 
( d ) 
43.22 
4.34790 
II_ 
17.89 
9.46 
24.32 
28.81 
16.95 
2.58 
6.86 
3.10 
( d ) 
43.17 
4.34358 
III_ 
17.83 
9.81 
22.80 
29.58 
17.51 
2.48 
6.60 
2.63 
( d ) 
43.58 
4.35050 
221E-885-I_ 
17.03 
9.98 
13.33 
29.07 
27.98 
2.61 
5.97 
2.78 
( d ) 
44.01 
4.42019 
n_ 
18.11 
9.63 
24.15 
29.15 
16.72 
2.25 
6.89 
2.93 
46.58 
43.67 
4.32726 
221F-874-I.. 
15.30 
9.02 
23.12 
29.80 
20.44 
2.32 
6.36 
2.85 
47.03 
43.80 
4.42538 
II_ 
16.48 
8.64 
23.10 
28.53 
20.72 
2. 52 
6.30 
2.98 
47.53 
43.65 
4.38052 
221F-887-I.. 
16.85 
8.82 
25.05 
29.85 
17.33 
2.11 
6.74 
2.40 
47.95 
44.21 
4.45052 
II_ 
17.26 
9.09 
26.79 
28.19 
16.57 
2.10 
7.15 
2.59 
47.63 
43.89 
4.39412 
° True protein, A. O. A. C. method. 
b Nonprotein, NX4.7. 
* No determinations of carbon in the fresh substance were made prior to experiment 221E. 
d By direct combustion of the fresh materials. 
The analyses of the dung alone represent the composition of the 
dung as collected separately on a single day of each period, and are 
used only to obtain an approximation of the apparent digestibility. 
For purposes of comparison, the total nitrogen was determined on 
the fresh material by Konig’s method, and also on the sample after 
air drying by the Kjeldahl method. The data show clearly that 
nitrogen was lost during the drying of the sample. Beginning with 
experiment 22 IF the carbon in the fresh material also was determined 
by direct combustion as well as in the air-dry sample. The loss of 
carbon shown is of relatively greater consequence in subsequent com¬ 
putations than is the loss of nitrogen, and may not be neglected with¬ 
out introducing material error. 
