144 A Nvzv Dairy Industry. 



tion of breeds has lost a great deal of its importance, 

 the main requsite now being : a healthy cow. 



The relation of fat to casein and of total percent- 

 age of solids to that of albumen is, however, a varia- 

 ble quantity in the different breeds, and should be 

 studied and taken into account when planning the 

 manufacture of normal infants' milk. The work of 

 a number of experiment stations on this line has been 

 invaluable in determining the respective percentages 

 in the milk of the standard breeds of cattle. 



The average composition found by analyses of 

 28,000 samples of milk was total solids, 12. UN per 

 cent.; fat, 3.91 ; solids, not fat, 8.77 ; specific gravity, 

 1.0318. When computed for an entire period of lac- 

 tation, the following figures were found for the re- 

 spective breeds : 



