42 Report of DErARXMENT of Animal Husbandry of the 



milk fat secretion, whetlier this fat is derived wholly from fats 

 previously formed in the plant or from protein, or whether car- 

 bohydrates may support its formation either directly or through 

 the previous formation of body fat. 



The tables which immediately follow give the daily nitr n 

 and fat balance for the three cows. From these tables various 

 summaries are derived which show the bearing of the evidence 

 secured. 



