TABLE OF CONTENTS xiii 



267 ; Improvement in speed, 268 ; Selection, 269 ; Natu- 

 ral selection, 270; Methodical selection, 271; Im- 

 portance of selection in animal-breeding, 272 ; Aids to 

 selection, 273 ; The real results of selection in the im- 

 provement of the domestic animals, 274; Selection 

 within pure lines, 275 ; Vilmorin's pure line wheat- 

 breeding, 276 ; Selection most useful when genetic fac- 

 tors are not pure, 277 ; Pure line theory not opposed to 

 improvement by selection, 278 ; Pedigree, 279 ; Regis- 

 tered breeding animals, 280 ; Registry associations, 281 ; 

 Community breeding, 282 ; Importance of numbers, 

 283 ; Selecting the best, 284 ; Selecting chance varia- 

 tions, 285 ; The Burbank method, 286 ; The mendelian 

 method, 287. 



