EXPERIMENT STATION. 



95 



found when the actual composition of the "grain" is made 

 the basis of the calculation, while the amount of protein differs 

 less than 0.01 lb. We may, therefore, estimate without essential 

 error that the 4.44 lbs. of "grain" fed were composed of 



Oats, 0.63 lbs. 



Maize, ...1.27 



Wheat bran, 2.54 



4.44 



It will be noticed that analyses were made of the hay and corn 

 fodder left uneaten and that these, as was to be expected, were of 

 poorer quality than the original materials. It follows that the por- 

 tions actually eaten were of correspondingly better quality, and 

 it is the comjjosition of these which must furnish us with the cor- 

 rect basis for our estimate of digestibility. The 18.23 pounds of 

 hay fed per day and head contained 12.07 pounds of dry matter, 

 and the 2. 27. pounds left uneaten contained 1.75 pounds of dry 

 matter. By subtracting the amounts of the several ingredients 

 contained in the latter quantity from those contained in the former, 

 we shall obtain the amovtnts contained in the 10.32 pounds of dry 

 matter actually eaten, from which its percentage composition may 

 readily be computed. The calculation is as follows : 



Percentage 

 Dry matter of Dry matter of Dry matter of composition of 

 hay fed out. hay uneaten. hay eaten. dry matter of 



(Diflerence.; liay eaten. 



lbs. lbs. lbs. 



Ash, ..0.82 O.U 0.71 6.8S 



Protein, 1.43 0.13 1.30 12.60 



Crude Fiber, 3.54 0.61 2.93 28.39 



N. fr. extract, 5.99 0.86 5.13 49.71 



Pat, 0.29 0.04 0.25 2.42 



12.07 1.75 10.32 100.00 



Making a similar computation for the corn fodder we obtain 



the following results: — 



