172 



DAIRY FARMING 



butter and for cream of a somewhat yellow color is based 

 entirely upon looks. 



FACTORS INFLUENCING COMPOSITION 

 160. The Kind of Animal. As already stated, the milk 

 of all species contains the same constituents but in different 

 proportions. Table 19 gives the average composition of 

 human milk and of that from several domestic animals. 



TABLE 19. COMPOSITION OF MILK OF DIFFERENT ANIMALS 



The composition of human milk is of great importance 

 in connection with the problem of infant feeding. Within 

 recent years it has become more and more the practice to 

 modify cow's milk when used for infant food so that it ap- 

 proaches the normal milk of the human mother. The most 

 marked difference in composition between human and cow's 

 milk is the decidedly lower protein and higher sugar content 

 in the former. 



The general plan followed in modifying cow's milk for 

 infant feeding is to add sufficient water to reduce the pro- 

 tein content to that found in human milk. Cream is then 

 added to restore the fat content to from 2.5 to 3.5 per 



