1904.] PUBLIC DOCUMENT — No. 33. 45 



Part II. — Daiky axd Feeding Expekiments. 



A. Effect of Feed on the Composition of Milk and 

 BuTTEu Eat, and on the Consistency or Body of 

 Butter. 



J. B. LINDSEY.' 



Experiment VIII. 



A general outline of experiments of a similar character 

 Avill be found in the thirteenth and fourteenth reports of this 

 station. 



Object of the Experiment. — During the autumn and win- 

 ter of 1901-02 a series of experiments was undertaken, for 

 the purpose of noting, respectively, the effect of corn gluten 

 meal with a minimum percentage of oil, of gluten meal with 

 the addition of corn oil, and of corn meal, upon the relative 

 proportions of the several ingredients in milk and butter fat, 

 and upon the body of butter. 



Plan of the Experiment. — Ten cows were divided into 

 two lots of five each. Seven of the cows had calved in the 

 late summer and early autumn, one in the preceding April, 

 and two had been in milk about a year. The average milk 

 product of each cow at the beginning of the trial was about 

 21 pounds daily. During the first period, both herds re- 

 ceived the so-called standard grain mixture ; during the tliree 

 subsequent periods. Herd I. continued to receive the stand- 

 ard grain ration as in the first period ; and in case of Herd 

 n., a portion of the standard ration was replaced by gluten 

 meal, by gluten meal and corn oil, and by corn meal, 

 respectively. 



1 With E. B. Holland and P. H. Smith. 



