26 N. C. AGRICULTURAL EXPERIMENT STATION. 
In addition to determining the digestibility of this and the rations 
which follow, it was also the purpose of the experiments to study 
the effect of cotton-seed meal upon the digestibility of coarse fodders. 
.The above ration, it will be observed, is materially more digestible 
than the silage alone, but less so than the mean of Armsby’s and 
Wolff s coefficients show for the meal. Armsby’s coefficients for 
cotton-seed meal were obtained upon sheep by feeding the meal with 
clover hay. Yv hat effect the meal exerted upon the digestibility of the 
hay, or vice versa, is unascertained. It is interesting to know, from 
both scientific and economic points ot view, whether the digestibility 
of the ration here considered is merely a mean of the digestibility of 
silage when fed alone and ot cotton-seed meal as determined by 
Armsby and Wolff, or whether one or both have influenced the 
digestibility ol the other in the ration. In the tables which follow 
it has been attempted to bring out this point by calculating what 
would have been digested from the silage had it been fed alone by 
« using oui coefficients for it as thus fed, and what was digested from 
the meal by using the coefficients referred to above and subtracting 
these sums from what was actually digested in the ration. One 
obstacle to the above calculations was the wastes, which were part 
silage and part meal. Separation of these was quite impossible, 
but to err on the side of diminishing rather than enlarging the 
increased digestibility of the ration over the calculated results, the 
wastes weie assumed to be only as digestible as silage alone, whereas 
their compositions, as shown in Table XV, indicate they were more 
digestible. 
The results of these Tables (XVII and XVIII) arequ ite uniform in 
indicating the combination of silage and meal to be, on the whole, 
slightly more digestible than silage alone, and meal, as based upon 
the coefficients referred to. Like results to these in the next experi¬ 
ment are still more prominent. 
