CONTENTS 



i 



Chemistry of Cow's Milk and Milk Products ... 1 



II 

 Methods of Sampling Milk . 20 



III 



The Babcock Test Description of Apparatus and 



Materials 32 



IV 

 Method of Operating the Babcock Test .... 53 



V 

 Method of Testing Cream by the Babcock Test . . 69 



VI 



Methods of Testing Skim-milk, Whey, Butter, Cheese, 



etc. . . 81 



VII 



Methods of Testing Acidity of Milk and Milk Prod- 

 ucts ..-96 



VIII 



Methods of Testing the Bacterial Condition of Milk 113 



IX 



Methods of Testing Milk by Rennet-Extract and 



Pepsin 121 



X 



Methods of Testing Specific Gravity and Solids of 



Milk by the Lactometer 127 



