THE CHEMICAL COMPOSITION OF MILK 



31 



Properties and composition of milk-serum (Van Slyke and 

 Bosworth) 



Serum prepared from fresh milk by the method described 

 above has a characteristic appearance, being of a yellow color 

 with a faint greenish tinge and slight opalescence. 



The serum from fresh milk gives a slight acid reaction to 

 phenolphthalein and a strongly alkaline reaction to methyl 

 orange. 



CONSTITUENTS OF MILK-SERUM 



In the table above we give the results of the examination of 

 two samples of fresh milk, the serum of which was prepared 

 in the manner already described. These samples of milk 



1 As chlorides. 



