268 



A gr icultural Chemistry. 



Comparative Composition of the Milk, Blood and Body 

 of the Same Animal. 



100 Parts by weight of ash contained in grams 



If we compare the time required by the suckling to double 

 its weight at birth, with the amounts of protein and ash per- 

 haps the most essential constituents for the formation of tissue 

 contained in 100 parts of milk, it is evident at a glance that the 

 amounts of these increase in proportion to the rate of growth of 

 the animal. This is shown in the following table: 



Composition of Milk Ash from Different Animals. 



