16 AGRICULTURAL P:XPERIMENT STATION. [Jan. 



the time at twenty-five dollars per ton of two thousand 

 })ounds. The commercial value of its fertilizing constitu- 

 ents, 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 dollars in the net 

 cost of both kinds of fine or grain feed. A successful 

 attempt at using " maize feed" in })lacc of corn meal in the 

 daily diet of milch cows could iu)t fail to secure a material 

 reduction in the net cost of the grain feed portion of the 

 daihj fodder ration. 



From six to eight cows, grades of various descriptions 

 and of different milking })eriods, were selected for the trial. 

 Some of these animals served a sliorter period than others, 

 on account of a too for 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 obser- 

 vation. 



1. Hhtorij of Cows. 



2. Description of Fodder Articles. 



The grain feed portion of the daily diet consisted at differ- 

 ent times either oi corn meal, wheat J/rm and maize feed 

 (Chicago), or of maize feed, tvheatbran and cotton-seed meal. 



The mechanical condition of these various feed stuffs was 

 good, and their chemical composition in every case a fair 

 one, as maj^ be seen from an abstract of the average result 

 of our analyses. The Chicago maize feed was of a some- 

 what 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. 



