BULLETIN No. 80c. 
13 
TABLE IX. 
THE AMOUNT IN OUNCES OF FERTILIZING CONSTITUENTS AND 
VALUE EXCRETED IN DUNG AND URINE DUR¬ 
ING THE FOUR DAYS. 
Feed 834.33 ounces of Cotton ^ , f 1344 ozs. Cotton Seed Hulls. 
Seed Hulls. ee \ 192 ozs. Cotton Seed Meal. 
Feed. 
Du 
ng. 
Urine. 
Feed. 
Du 
ng. 
Urine. 
Ozs. 
1 _ 
Value. 
Cents. 
Ozs. 
i 
Value. 
Cents. 
S3 
O 
Value. 
Cents. 
1 
Ozs. 
Value. 
Cents. 
CC 
S3 
O 
Value. 
Cents. 
Ozs. 
Value. 
Cents. | 
N itrogen. 
5.83 ; 5.7 
4.58 
4.5 
1.88 
1.8 
21.70 
21.3 
12.07 
11.8 
7.20 
7.1 
Phos. Acid.. 
1.47 ! 0.5 
1.75 
0.5 
.12 
.04 
7.53 
2.3 
6.31 
2.0 
.51 
0.2 
Potash. 
13.34 4 2 
5.58 
1.8 
3.79 
1.2 
25.31 
7.8 
9.10 
.2.8 
7.55 
2.4 
Total value.. 
. 10.4 
6.8 
3 04 
31.4 
16.6 
9.7 
The above figures make apparent the value of urine as a 'fertilizer. 
Its richness depends upon that of the food. In both of the above ex¬ 
periments about one-third of the nitrogen and nearly one-half of the 
potash excreted were in the urine while most of the phosphoric acid was 
in the solid excrement. 
In determining the digestibility of a food by direct experiment with 
animals, two factors enter to make the co-efficient for albuminoids ap¬ 
parent rather than real. When the albuminoids are reckoned, as they 
often are, from the total nitrogen content of the food the amides, if 
present, tend to make the co-efficient too large. While the bile acids and 
coloring matters, mucus and other intestinal products containing nitrogen 
and not belonging to the the undigested food residue proper tend to de¬ 
press it. The intestinal products may cause an error of several percent, 
in the albuminoid co-efficient of coarse fodders of low nitrogen content. 
In the table that follows is contained data on the above two points for 
the two digestions given in this Bulletin. 
TABLE X. 
PERCENTAGE OF NITROGEN IN THE DIGESTION EXPERIMENTS. 
NITROGEN IN 100 PARTS, AIR-DRY SUBSTANCE. 
Total. 
1 
' 
Albuminoid. 
Non-albumi- i 
noid. 
Total after ex¬ 
traction with 
ether, alcohol, 
hot water and 
cold lime wa¬ 
ter. 
♦ 
Difference 
from total 
nitrogen. 
1 
Per Cent. 
Per Cent. 
Per Cent. 
Per Cent. 
Cotton seed hulls. 
.7 
.70 
.0 
.66 
.04 
11rm ypp/] mpnl 
6 41 
6.36 
.05 
TTappq fmm pnttnn sppfl hulls. 
.94 
.91 
.03 
Feces’ from cotton seed hulls and 
meal. . 
1.53 
1.42 
.11 
