93 



OFFERTON BULLETIN No. 3. 



Experiments on the Feeding of Dairy 



Cows. 



Third Report, 2mblished July, 1909. 



BY FRANK P. WALKER. 



A SECOND EXPERIMENT TO TEST THE EFFECT OF 

 BREWERS' GRAINS ON THE QUANTITY AND 

 QUALITY OF MILK. 



Object. The main object of the present experiment was 

 to see how far the deductions made from Experiments I and J 

 described in the above Bulletin were reliable. It was thought 

 another experiment on exactly the same lines would yield 

 equally interesting- results. The special object was to dis- 

 cover the effect on the quantity and quality of milk of a ration 

 containing a moderate amount of brewers' grains compared 

 with a ration containing none. 



EXPERIMENT K 



Preliminary trials. Those cows which were to be used in 

 the experiment were average dairy cows, and before the ex- 

 periment was begun all of them were tested for tuberculosis. 

 The ten selected satisfactorily passed the test. They were 

 newly calved and were arranged in two lots of five each 

 according to the yield and quality of the milk. The prelim- 

 inary trials lasted for three weeks. The experiment com- 

 menced on December 8, 190T. A short time elapsed before 

 the actual experiment commenced after the preliminary trials 



