1898.] 



PUBLIC DOCUMENT — No. 33. 



89 



cent, more butter fat was produced by the cotton-seed ration. 

 This latter result could hardly have been expected. Should 

 cotton-seed feed exert a favorable influence in increasing 

 the relative amount of butter fat in the milk, other experi- 

 ments would show similar results, which we shall presently 

 show has not been the case. A part of the decrease in the 

 amount of milk, solids and tat produced by the hay ration 

 can be accounted for in the sudden shrinkage of Cow V. 

 (Red) in the second (hay) period. This cow was a grade 

 Durham, and at the beginning of her second period was 

 about 105 days from calving time. She began then to dry 

 ofl^ rapidly, showing a shrinkage of 34 per cent, in yield of 

 milk from that produced in the previous period, while other 

 animals shrank only from 5, to in one case 20 per cent. 

 Had Red shrank only 20 per cent., the total decrease in 

 milk yield in the hay period would have been but a trifle 

 over 1 per cent. The results of this experiment make rather 

 more of a favorable showing for the cotton-seed feed than 

 one would naturally expect, judging from its composition 

 and digestibility. Before, therefore, drawing positive con- 

 clusions, the reader is referred to the results of a second 

 experiment, described further on. 



Dry and Digestible Matter required to produce Milk and Butter 



{Per Cent.). 



Market Cost of Feed Stuffs 



Wheat bran, ..... 

 Peoria gluten feed, 

 Linseed meal, .... 

 Millet and soya bean ensilage. 



Hay, 



Cotton-seed feed, .... 



