THE NORMAL COMPOSITION OF MILK 



Table XXIII 

 PERCENTAGE OF FAT IN TOTAL SOLIDS 



Breed. 



Vieth. 



Lythgoe. 



Eckles and 

 Shaw. 



American 

 Expt. Stat. 



Jersey 



Guernsey 



Welsh 



Sussex 



Kerry 



Dairy shorthorn. . . 

 Pedigree shorthorn 



Shorthorn 



Red polled 



Ayrshire 



Dutch belt 



Montgomery 



Holstein 



38.0 



34.7 

 34.4 

 34.5 

 31.3 

 31.4 



32.8 



28.5 



38.3 

 35.9 



31.8 

 30.9 



29.2 



39.2 



29.4 

 29.6 



27.2 



34.9 

 34.9 



29.3 



28.7 



28.1 



Table XXIV 

 SEASONAL VARIATIONS IN PROPORTIONS OF CONSTITUENTS 



Month. 



January. . . 

 February. . 

 March . . . . 



April 



May 



June 



July 



August. . . , 

 September, 

 October . . 

 November. 

 December . 



Proteid 

 Fat 



0.94 

 0.95 

 0.95 

 0.95 

 1.00 

 0.99 

 0.90 

 0.87 

 0.84 

 0.86 

 0.87 

 0.92 



Lactose 

 Proteid ' 



1.29 

 1.33 

 1.37 

 1.33 

 1.31 

 1.34 

 1.42 

 1.41 

 1.42 

 1.37 

 1.35 

 1.30 



Percentage of Fat 

 in Total Solids. 



29.8 

 29.2 

 28.8 

 29.1 

 28.4 

 28.1 

 29.3 

 30.3 

 31.0 

 30.9 

 30.9 

 30.2 



