70 



MANUAL OF MILK PRODUCTS 



fat globule was surrounded by a membrane, but this theory 

 has been almost abandoned at the present time. 



SIZE AND NUMBER OF FAT GLOBULES 



The size and number of fat globules in milk may vary widely 

 in different samples. The factors which seem to influence the 

 size and number of the globules are the breed, the age, and the 

 stage in the period of lactation. 

 Influence of breed. 



Woll 1 made extended studies on the size and number of fat 

 globules in the milk of cows entered in the breed tests at the 

 World's Columbian Exposition. He summarizes the results 

 obtained from the Jersey, Guernsey, and Shorthorn breeds in 

 the following table : 



NUMBER AND SIZE OF FAT GLOBULES FROM DIFFERENT BREEDS 



It will be noted from these figures that the number of fat 

 globules was greatest in the milk of the Shorthorns and smallest 

 in the Jerseys. At the same time, the average size of the glob- 

 ules was decidedly greater in the milk of the Jerseys and smallest 

 in the Shorthorns. 



Eckles 2 reports the relative size of the fat globules in the milk 

 of eleven cows representing four breeds as follows : 



Wisconsin Report, 1894. 



2 B. A. L, 156, pp. 20-21. 



