174 SCIENCE AND PRACTICE OF CHEESE-MAKING 



INFLUENCE OF STAGE OF LACTATION UPON THE RELA- 

 TION OF CASEIN AND ALBUMIN 



to 19.7. After the ninth month, the albumin in- 

 creases relative to casein, the increase being very- 

 marked in the two closing months of the lactation 

 periods studied. 



In the case of the mixed milk of numerous herds 

 of cheese-factory cows, we have the following re- 

 sults : 



Month 



April. 



May 



June 



July 



August 



September. . 

 October. . . . 



Parts of casein 

 for one part 

 of albumin 



Per cent 



of total 



proteins in 



form of 



casein 



2.81 

 3.02 

 3.24 

 3.07 

 3.02 

 3.20 

 3.55 



: Casein 



4.4 



3.4 



3.2 



3.8 



3.8 



3.9 



3.8 



81.5 

 77. S 

 76.2 

 79.2 

 79.1 

 79.7 

 79.2 



The proportion of casein in relation to albumin 

 decreases until July, when a marked increase oc- 



