122 CHEESE AND CHEESE-MAKING 



crops of those materials which are consumed by 

 the cow, and of which hay, straw, and roots are 

 the chief in winter, and grass in summer. To 

 this question, however, we cannot devote any 

 space. It is, nevertheless, clear that those who 

 feed upon a principle which has been found to 

 succeed in practice, obtain the best results. 

 They recognize that the cow needs the necessary 

 material to maintain the heat of her body, to 

 provide for the waste of tissue which is per- 

 petually going on, and for the manufacture of 

 the solid materials which are present in milk, 

 and in consequence they compose a ration which 

 includes the necessary proportion of albuminoids, 

 which they obtain by using such foods as cake, 

 beans, peas, vetches, or various meals with 

 liberality. There is no doubt that the cost of 

 production plus the cost of conveyance and the 

 supply of railway churns closely approximates 

 to the summer price of milk, which is perhaps 

 upon the average no higher than 6d. a gallon, a 

 great deal being sold below this figure. 



We have referred to the system of adulteration 

 which is now so widespread, and which is in- 

 creasing from month to month. The Centrifugal 



