6 MILK 



Total t... Solids not «-_ 



Solids ^*^ Pax ^^" 



9.03 0.63 8.40 0.70 



8.02 0.65 7.37 1.29 



10.70 0.54 10.16 0.82 



Whey or Milk-serum is the liquid freed from 

 curd after precipitation by rennet or acids. In 

 most cases it contains a notable amount of 

 proteins, as shown in the following analyses by 

 Cochran : 



Mile Whet 



Total soUda Solids not fat Total solids removed 



927 913 662 2.51 



927 913 6.1 3.03 



14.05 8.35 6.62 2.33 



7-71 7-6i 5.98 1.63 



8.91 8.71 6.50 2.21 



The whey of any given milk has practically the 

 same composition, whether taken from the 

 original milk, skimmed milk, or cream. 



Average Proportion of Solids in Milk. — The 

 most extensive data on this point are those 

 obtained by Vieth. The total number of samples 

 was 120,540. The averages of the entire series 

 are as follows : 



Fat 4.1% 



Non-fatty solids 8.8% 



Total solids 12.9% 



Lythgoe gives a table of averages of composi- 

 tion of 51 samples of genuine milk, each set of 



