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  Ever-sporting 
  Varieties 
  

  

  This 
  may 
  best 
  be 
  done 
  by 
  determining 
  the 
  de- 
  

   gree 
  of 
  inheritance 
  for 
  the 
  various 
  constituents 
  

   of 
  the 
  race 
  during 
  a 
  series 
  of 
  years. 
  It 
  is 
  only 
  

   necessary 
  to 
  apply 
  the 
  two 
  precautions 
  of 
  ex- 
  

   cluding 
  all 
  cross-fertilization, 
  and 
  of 
  gathering 
  

   the 
  seeds 
  of 
  each 
  individual 
  separately. 
  We 
  do 
  

   not 
  need 
  to 
  ascertain 
  whether 
  the 
  variety 
  as 
  

   such 
  is 
  permanent; 
  this 
  is 
  already 
  clear 
  from 
  

   the 
  simple 
  fact 
  of 
  its 
  antiquity 
  in 
  so 
  many 
  

   cases. 
  We 
  wish 
  to 
  learn 
  what 
  part 
  each 
  in- 
  

   dividual, 
  or 
  each 
  group 
  of 
  individuals 
  with 
  

   similar 
  characters, 
  play 
  in 
  the 
  common 
  line 
  

   of 
  inheritance. 
  In 
  other 
  words, 
  we 
  must 
  

   build 
  up 
  a 
  genealogical 
  tree, 
  embracing 
  several 
  

   generations 
  and 
  a 
  complete 
  set 
  of 
  the 
  single 
  

   cases 
  occurring 
  within 
  the 
  variety, 
  in 
  order 
  to 
  

   allow 
  of 
  its 
  being 
  considered 
  as 
  a 
  part 
  of 
  the 
  

   genealogy 
  of 
  the 
  whole. 
  It 
  should 
  convey 
  to 
  us 
  

   an 
  idea 
  of 
  the 
  hereditary 
  relations 
  during 
  the 
  

   life-time 
  of 
  the 
  variety. 
  

  

  It 
  is 
  manifest 
  that 
  the 
  construction 
  of 
  such 
  

   a 
  genealogical 
  tree 
  requires 
  a 
  number 
  of 
  sepa- 
  

   rate 
  experiments. 
  These 
  should 
  be 
  extended 
  

   over 
  a 
  series 
  of 
  vears. 
  Each 
  should 
  include 
  a 
  

  

  / 
  

  

  number 
  of 
  individuals 
  large 
  enough 
  to 
  allow 
  

   the 
  determination 
  of 
  the 
  proportion 
  of 
  the 
  dif- 
  

   ferent 
  types 
  among 
  the 
  offspring 
  of 
  a 
  single 
  

   plant. 
  A 
  species 
  which 
  is 
  easily 
  fertilized 
  by 
  

   its 
  own 
  pollen, 
  and 
  which 
  bears 
  capsules 
  with 
  

  

  