1909.] 



PUBLIC DOCUMENT — No. 31. 



67 



ration, which is spoken of as the normal ration. Dnrins; the 

 next period Herd I. continued to receive the normal ration, 

 and Herd II. received an addition of soy beans minus oil, 

 which replaced a like amount of the normal grain ration. Dur- 

 ing the third period Herd I. continued to receive the same 

 ration as in the two preceding periods, and to the ration of 

 Herd II., after it had been brought back to the normal grain 

 ration, was added a definite amount of soy bean oil. This 

 method was followed instead of adding the oil direct to the soy 

 bean meal ration because of the shortage of soy bean meal, and 

 since it was feared that the bean and excess of oil would have 

 too great a laxative effect upon the animals. The method of 

 feeding enabled one to note the direct effect of soy bean meal 

 and the soy bean oil uj)on the chemical character of the milk 

 and butter fat. 



Table I. — Duration of Experiment, 1907. 



Table II. — Data concerning Cows. 



