'' maize feed " sold at the time at $25 per ton of 2000 lbs. The com- 

 mercial value of its fertiliziug oonstitueuts, nitrogen, phosphoric acid 

 and potash, exceeded those contained in the corn meal from six to 

 seven dollars per ton, making a difference at the time of twelve dol- 

 lars in the net cost of both kinds of fine or grain feed. A successful 

 attempt at using " maize feed " in place of cornmeal in the daily 

 diet of milch cows could not fail to secure a material reduction in 

 the net cost of the grain feed portion of the daily fodder ration. 



From six to eight cows, grades of various descriptions and of dif- 

 ferent milking periods, were selected for the trial. Some of these 

 animals served a shorter period than others, on account of a too far 

 advanced stage of lactation. Our record on this occasion is confined 

 to four cows, which took part with but one exception from the 

 beginning of observatios. 



I. HISTORY OF COWS. 



2. DESCRIPTION OF F0DDP:R ARTICLES. 



The grain feed portion of the daily diet consisted at different times 

 either of corn tneal, wheat bran, and maize feed (Chicago), or of maize 

 feed, wheat bran and cottonseed meal. 



The mechanical condition of these various feed-stuflfs was good ; 

 and their chemical composition in every case a fair one, as may be 

 seen from an abstract of the average result of our analyses. The 

 Chicago maize feed was of a somewhat coarser texture than either 

 of the other articles. It represents the dried grain residue of the 

 maize kernels after the principal part of its starchy material has 

 been removed ; and contains more or less of the broken up skins of 

 the kernels. 



