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



If the amount of fat produced is taken into consideration and each side 

 of this equation is multiplied by the corresponding amount of fat we 

 have the result, 



870 X 1.3 = 756 X 1.6 

 or 1,131 = 1,210 



or i = 1.07, which is very near unity. 



The relation between the breed of the cow and the color of the 

 fat under two different conditions of feeding is well illustrated by 

 Tables 18 and 19. The color of the fat produced by cows No.. 34 

 and 208 is given under both heavy and moderate pigment feeding. 

 The data in Table 19 were obtained a number of weeks after that in 

 Table 18. The figures show that the change from heavy to moderate 

 pigment feeding caused the color of the milk fat of the Jersey cow 

 to drop 50% while a similar change in the feed of the Hblstein cow 

 caused a color drop of only 35%. 



The relation of the breed to the change in color produced by a 

 change in the ration is also well illustrated in the following table 

 No. 20. 



TABLE No. 20. COLOR PRODUCTION IN DIFFERENT BREEDS AS AFFECTED BY 



CHANGES IN RATION. 



The first sample for each cow in the above table represents the 

 result of a long continued feeding of a ration almost entirely lacking 

 in carotin and xanthophylls. The second sample represents one month's 

 feeding of a ration rich in these pigments, the ration including a 



