CONTENTS 



I 



Chemistry of Cows" IMilk 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 



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



etc., by the Babcock Test 78 



VII 

 Methods of Testing Acidity of Milk and Milk Prod- 

 ucts 88 



VIII 

 Methods of Testing the Bacterial Condition of Milk 105 



IX 



Methods of Testing Milk by Rennet-Extract and 



Pepsin 113 



X 



Methods of Testing Specific Gravity and Solids of 



Milk by the Lactometer 119 



ix 



