CONTENTS 



Preface 7 



Chapter I 



Origin and Early History of Breeds of Dairy Cattle 9 



Chapter II 



Development of Registration as a Means of Isolating and Per- 

 petuating Breeds 11 



Chapter III 

 Breeds of Dairy Cattle and Mode of Recording in Each Breed 12 



Chapter IV 



Development of Productivity Registers 30 



Chapter V 

 Tracing a Pedigree 32 



Chapter VI 

 Organizing a Good Sales Pedigree 41 



Chapter VII 

 Characteristics of Pedigrees in the Different Breeds, Inbreeding. 43 



Chapter VIII 

 Characteristics of Pedigrees for the Different Breeds, Kinship.. 50 



Chapter IX 



Characteristics of Pedigrees for the Different Breeds. Homozy- 

 gosis Resulting from Different Types of Matings 55 



Chapter X 

 Characteristics of Pedigrees, Famous Ancestors 66 



Chapter XI 

 Conformation in Relation to Milk Yield 73 



Chapter XII 



Age of the Cow in Relation to Milk Yield 77 



5 



