PROPERTIES AND COMPOSITION OF MILK, 

 BUTTER, <fec. 



Composition of Milk in 1000 parts. 



Water 840 



Casein 40 



Milk-sugar 45 



Butter, or oil... 40 



Phosphate of lime 17 



Phosphate of magnesia 4 



Chloride of potassium 9 



Common salt 2 



Free soda 3 



1000 



NOTE. Milk is heavier than water in the proportion of 

 103 to 100. 



The rapidity with which cream rises to the surface de- 

 pends upon the temperature to which it is exposed. 



New milk, set aside, will cream in 



36 hrs. if the temperature of the air is 50 Fahrenheit. 



24 " " " 55 



18 to 20 " " " " 68 " 



10 to 12 " " " 77 



At a temperature of 34 to 37, it may be kept two to 



