20 
N. C. AGRICULTURAL EXPERIMENT STATION. 
In the above table are given the coefficients of digestibility of the 
ration of silage and raw cotton-seed, and also of the raw cotton-seed 
alone, calculated bv using the coefficients obtained with the same 
animal for corn silage in preceding experiment. The animal could 
not thrive upon raw cotton-seed alone, and it w r as necessary to teed 
with them silage or some other like food whose digestibility wasknown. 
The cofficients make a good showing for raw cotton-seed, especially 
so w r hen we consider the low digestibility of the hulls, which com¬ 
pose about one-half the whole seed. The high digestibility of the 
starch and low digestibility of the gums, wax, and other undeter¬ 
mined carbohydrates of raw cotton-seed, as well as those of the 
roasted seed, are points interesting to note. 
f 
7. DIGESTION OF ROASTED COTTON-SEED AND SILAGE 
By Spotted Heifer and Steer No. 3. 
Date of Experiment, February and March, 1892. 
Total period, 15 days. 
Daily ration, 12 pounds silage and 6 pounds roasted seed. 
Feces collected during last six days. 
Equal samples of roasted seed were taken at every feed and pre¬ 
served in air-tight jars till ready for analysis. 
The silage fed in this experiment was the same as in the second 
experiment with raw seed and silage. 
The seed were roasted in a Greene roaster, which is a wire-covered 
cylinder revolving in a sheet-iron frame. The seed lost in roasting 
17.66 per cent, of their original weight. There was 17.51 per cent, 
water in the fresh seed. The loss was, therefore, mainly water 
driven off. 
The roasted seed had a pleasant odor and taste, and were quite 
palatable, except for a slight bitterness of the browned hull residue 
after being chewed. 
Analytical and Other Data for Calculating the Coefficients of Digesti¬ 
bility. See Tables XIII and XIV. 
