CONTENTS 



IX 



CHAPTER IV 



Physical Properties of Milk 



Form of fat globules 



Size and number of fat globules . 

 Influence of breed . . . 

 Influence of age of cows on number and size of fat 



globules 



Influence of period of lactation on size of fat globules 



Specific gravity of milk 



Odor of' milk . 



The yellow color of milk and milk-fat . . . 

 Source of the yellow color of milk-fat 

 Relation between color of milk-fat and breed of cow 

 The pigments of the fat from colostrum milk 

 The yellow pigment of milk whey 



Factors influencing the color of milk whey 

 Influence of breed on the color of milk whey . 

 Influence of the stage of lactation on the color of the 



whey 



Influence of the age of the animal on the color of 



the milk whey 



Influence of the volume of milk production on the 



color of the milk whey . 

 Influence of feed on the color of the milk whey 

 Viscosity or consistency of milk .... 

 Effect of physical agents .... 



Heat . . . . . 



Centrifugal force 



Effect of chemical agents . . . . 



Acids 



Alkalies . . ... 



Conclusions . . . . . . 



The specific heat of milk and milk derivatives 



Specific heat of whole milk .... 



Specific heat of whey 



Specific heat of skim-milk .... 

 Specific heat of cream ..... 

 Specific heat of butter ..... 

 Specific heat of butter-fat , • . • 



PAGES 



69-101 

 69 

 70 

 70 



