316 



THE MILK OF MAMMALS OTHER THAN THE COW. 



curd may differ in their proteins, but it is possible that the different 

 reaction with rennet is due to a deficiency of lime, or to an 

 alkaline reaction. 



The following milks have an alkaline reaction to litmus : 

 Human milk, the milk of the mare, ass, rabbit, sow, and cat. 



Composition of Milk. Table LXXV. gives the mean 

 composition of the milk of different mammals. 



Of these milks those of the cow, goat, sheep, buffalo, mare, 

 ass, and, in some countries (e.g., Spain), sow are used for human 

 consumption, and, with the exception of that of the sow, are 

 worthy of a more detailed notice. Human milk, the natural 

 food of infants, will also be dwelt on. 



TABLE LXXV. COMPOSITION OP MAMMALIAN MILK. 



Human Milk Appearance. Human milk has usually a chalky 

 white, somewhat watery appearance ; some specimens, usually 

 those high in proteins, have^a marked yellowish tint. A red 

 coloration, due to blood, has been noticed by Carter and the 

 author. 



Properties The fat globules, according to Pizzi, vary in 

 size from 0-009 mm. to 0-0009 mm. Carter and the author have 

 observed also that they are, on the whole, smaller than those of 

 cow's milk. 



