1911. 



PUBLIC DOCUMENT — No. :U. 



93 



Protein Balance {Pounds). 



Periods of Twenty-one Days. 



Influence of Protein on Milk Yield. 



Herd Results in Pounds. 



It will be seen that on the high-protein ration the cows re- 

 ceived 92.8 per cent, more digestible crude protein than was 

 reqnired for maintenance and for the milk produced, while in 

 low-protein ration the excess was only 5 per cent., the amount 

 digested and the amount fed being substantially equal. 



The figures show that for a period of twenty-one days, while 

 not changing in weight, the herd produced 13.3 per cent, more 

 milk on the high-protein diet, showing very distinctly the in- 

 fluence of the excess of protein. This experiment exactly con- 

 firms the experiment immediately preceding. 



