AGRICULTURAL EXPERIMENT STATION'. si 



The foregoing data, which as stated, are the result of an attempt 

 to study the influence of widely varying rations upon the production 

 and characteristics of milk, give conclusive evidence in regard to 

 but one of the several poiuts considered. The figures tabulated 

 give information about, 



(1) The total and digestible food consumed. 



(2) The body weights of the animals. 



(3) The milk yield. 



(4) The composition of the milk. 



(5) The yield of milk solids. 



(6) The composition of the milk solids. 



(7) Certain chemical and physical characteristics of the butter 

 fat. 



A review of these data warrant the following summary : 



(1) Milch cows were fed two rations differing widely in the 

 amount of protein which they contained. The hay was the same 

 in both, also the weight of grain, but in one the grain consisted 

 wholly of corn meal while in the other it was made up of cotton- 

 seed, gluten and corn meals in equal parts. 



(2) Both rations furnished practically the same amount of 

 digestible material. The proportion of digestible protein was 

 nearly twice as great in the mixed grain ration as in the corn meal 

 ration. 



(3) The cows did not vary greatly in body weight, but their 

 general appearance showed less thrift while being fed the corn meal 

 ration. 



(4) The yield of milk from the nitrogenous ration was from 

 one-fifth to more than one-third larger than that from the corn meal 

 ration, the excess ranging with the three cows from 20 per cent 

 to 36 per cent, or an average of about five pounds of milk per day. 



(5) In general the milk was materially richer while the cows 

 were fed the ration rich in protein, though with one cow it showed 

 the largest percentage of solids during the third period while she 

 was eating the corn meal ration. With the other two cows the 

 influence of the mixture of cotton-seed meal, gluten meal and corn 

 meal in increasing the per cent of solids of the milk seemed quite 

 marked. 



(6) The daily yield of milk solids was from thirty to forty per 

 cent greater with the more nitrogenous ration. 



