BY H. S. HALCRO WARDLAW. 



861 



The curves show that the percentage of fat in cows' milk tends 

 to rise slowly during- the whole period of lactation. 



Text-tig. t). 

 Effect of age of calf or stage of lactation on composition and properties of 

 cows' milk. Ordinates : values of composition and properties. Ab- 

 scissae : ages of calves (months). 



The percentage of protein falls slightly during the first three 

 months, and then rises till the end of lactation, when its value is 

 nearly 30% higher than it was in the first month. 



The percentage of ash falls slightly during tlie first five months, 



