CHAPTER XIX 

 MILK AND ITS PRODUCTS 



146. Milk. Milk contains water, fat, casein, albumin, 

 milk-sugar, and mineral salts in proportions especially 

 suited to the young of the mammal producing it. Table 

 XXI shows the average composition of the milk of a num- 

 ber of mammals : 



TABLE XXL THE COMPOSITION OF VARIOUS MILKS 



147. Milk from Different Breeds of Cattle. The 



nutritive ingredients of milk are combined in such propor- 

 tions that it serves excellently as a part of the diet of adults, 

 and its products, butter and cheese, are widely used and 

 highly nutritious foods. For the production of butter, the 

 content of fat in the milk is of prime importance, provided 

 that the yield of milk is not sacrificed to this end. In table 

 XXII are shown the differences in composition of milk of 

 different breeds of cattle. 



198 



