﻿xviii 
  Contents 
  

  

  LECTURE 
  PAGE 
  

  

  and 
  embryonic 
  variability. 
  Sugar-canes. 
  

   Flowering 
  cannas. 
  Double 
  lilacs. 
  Other 
  

   instances. 
  Burbank's 
  method 
  of 
  selec- 
  

   tion. 
  

  

  XXVII. 
  Inconstancy 
  of 
  improved 
  races 
  . 
  . 
  . 
  770 
  

   Larger 
  variability 
  in 
  the 
  case 
  of 
  propaga- 
  

   tion 
  by 
  seed. 
  Progression 
  and 
  regres- 
  

   sion 
  after 
  a 
  single 
  selection, 
  and 
  after 
  

   repeated 
  selections. 
  Selection 
  experi- 
  

   ments 
  with 
  corn. 
  Advantages 
  and 
  effect 
  

   of 
  repeated 
  selection. 
  

  

  XXVIII. 
  Artificial 
  and 
  natural 
  selection 
  . 
  . 
  . 
  798 
  

   Conclusions. 
  Specific 
  and 
  intra-specific 
  

   selection. 
  Natural 
  selection 
  in 
  the 
  field. 
  

   Acclimatization. 
  Improvement-selection 
  

   of 
  sugar-beets 
  by 
  various 
  methods. 
  Rye. 
  

   Hereditary 
  percentage 
  and 
  centgener 
  

   power 
  as 
  marks 
  by 
  which 
  intra-specific 
  

   selection 
  may 
  be 
  guided. 
  

  

  Index 
  ...... 
  . 
  827 
  

  

  