268 



THE FEEDING OF ANIMALS 



362. Milk of several breeds. — ^The milk of the cow- 

 varies with the breed, the individual, and the period of 

 lactation, and in its use for feeding purposes these varia- 

 tions should be considered. 



♦Assumed. 



tCalculated. 



While we have few or no data on the subject, it is 

 probable that the same causes operate in affecting the 

 milk of all species. 



363. Dairy by-products.^-These by-products are three 

 in number, skim-milk, both from the gravity and the 

 separator processes, buttermilk, and whey. Their aver- 

 age composition, as taken from compilations by several 

 authors, is as follows: 



♦Probably includes the lactic acid. t.80 per cent lactic also present. fAssumed. 



