6 CONTENTS 



Chapter XIII 



Age of the Cow in Relation to the Butter-fat Percentage 88 



Chapter XIV 



Mode of Secretion of Milk in the Udder 92 



Chapter XV 



Permanence of Milk Yield and Butter-fat Percentage 93 



Chapter XVI 



Inheritance of Milk Yield from Dam to Daughter 99 



Chapter XVII 



Influence of the Grandparents on the Granddaughters' Milk 

 Yield 101 



Chapter XVIII 



The Inheritance of Milk Yield and Butter-fat Percentage in 

 Crosses of Animals Differing Widely in the Amounts of These 

 Variables „ 103 



Chapter XIX 



The Chromosome Mechanism of Heredity in Relation to Dairy 

 Cattle Inheritance 105 



Bibliography of Cattle Inheritance 107 



