382 MISSOURI AGRICULTURAL EXP. STA., RESEARCH BULLETIN NO. IO 



not usually found in other breeds. It will be shown in a subsequent 

 paper that if the body fat which furnishes the supplementary pig- 

 ments in the case of the Jersey (or Guernsey) cow is laid on with 

 a non-pigmented ration, it will be as colorless as is often seen in the 

 case of the body fat of Holstein cows. If this were true in the 

 hypothetical case described above, there would have been no breed 

 characteristic evident, for it will also be shown in a subsequent paper 

 that the normal storage of pigment, i. e. that of the blood serum, is 

 practically the same for all breeds of cows. 



Sufficient evidence has been presented to permit a repetition of 

 a previous statement, namely that the relation of the breed to the 

 color of the milk fat has received more emphasis than a study of the 

 question will warrant. The color of the milk fat is primarily depend- 

 ent upon the character of the food and the fact that some breeds of 

 cows give less color in their milk fat than other breeds will probably 

 be found to be only an apparent one when all the factors which come 

 into play are known. 



