MILK. 



195 



called * 'leucocytes, "which are endowed with a power of 

 motion. The composition of colostrum is given by 

 Boussingault as follows : 



Water -'{'5-8 



Albumen and caseine - 1^-^ 



Fat. — - .- 2.6 



Sugar - |-6 



Salts - -_3^ 



Total 100.0 



Dumas gives the composition of colostrum of the vari- 

 ous animals mentioned as below, viz. : 



Milk, it is admitted by all physiologists, is produced 

 by a fatty degeneration of the epithelial cells of the 

 gland follicles, in which the cells are very greatly multi- 

 pUed and developed during lactation. The cells rupture 

 and set free the fat globules. This theory is rendered 

 liighly probable by the similarity between milk and 

 other animal products of the glandular follicles, or the 

 breaking down of cellular tissue, as mucous and true pus, 

 the composition of which are very much like that of co- 

 lostrum. Thus pus from a mammary abscess in a cow 

 has been found to consist of the following, viz. : 



Water. -- - 87.94 



Fatty matter - 2.65 



Albumen Ann 



Lactates of soda, potassa, lime and phosphates - - - 0.90 



Loss ----. - .-015 



100.00 



The frequent production of pus in the cow's udder, 

 which often goes under the name of ropy milk, is a very 

 easy transformation of the products of the gland follicles 

 due to disturbance of the function of lactaUon. In co- 



