﻿548 
  Mutations 
  

  

  origin 
  for 
  all 
  the 
  observed 
  individuals 
  of 
  either 
  

   strain. 
  But 
  whether, 
  besides 
  this, 
  similar 
  

   strains 
  are 
  produced 
  anew 
  by 
  the 
  old 
  lamarcM- 
  

   ana 
  group, 
  it 
  is 
  impossible 
  to 
  decide 
  on 
  the 
  sole 
  

   ground 
  of 
  these 
  field-observations. 
  

  

  The 
  same 
  holds 
  good 
  with 
  the 
  other 
  novelties. 
  

   Even 
  if 
  one 
  of 
  them 
  should 
  germinate 
  repeated- 
  

   ly, 
  without 
  ever 
  opening 
  its 
  flowers, 
  the 
  possi- 
  

   bility 
  could 
  not 
  be 
  excluded 
  that 
  the 
  seeds 
  might 
  

   have 
  come 
  originally 
  from 
  the 
  same 
  capsule 
  but 
  

   lain 
  dormant 
  in 
  the 
  earth 
  during 
  periods 
  of 
  un- 
  

   equal 
  length. 
  

  

  Other 
  objections 
  might 
  be 
  cited 
  that 
  can 
  only 
  

   be 
  met 
  by 
  direct 
  and 
  fully 
  controlled 
  experi- 
  

   ments. 
  Next 
  to 
  the 
  native 
  locality 
  comes 
  the 
  ex- 
  

   perimental 
  garden. 
  Here 
  the 
  rule 
  prevails 
  that 
  

   every 
  plant 
  must 
  be 
  fertilized 
  with 
  pollen 
  of 
  its 
  

   own, 
  or 
  with 
  pollen 
  of 
  other 
  individuals 
  of 
  

   known 
  and 
  recorded 
  origin. 
  The 
  visits 
  of 
  in- 
  

   sects 
  must 
  be 
  guarded 
  against, 
  and 
  no 
  seeds 
  

   should 
  be 
  saved 
  from 
  flowers 
  which 
  have 
  been 
  

   allowed 
  to 
  open 
  without 
  this 
  precaution. 
  Then 
  

   the 
  seeds 
  of 
  each 
  individual 
  must 
  be 
  saved 
  and 
  

   sown 
  separately, 
  so 
  as 
  to 
  admit 
  of 
  an 
  apprecia- 
  

   tion, 
  and 
  if 
  necessary, 
  a 
  numerical 
  determina- 
  

   tion 
  of 
  the 
  nature 
  of 
  its 
  progeny. 
  And 
  last 
  but 
  

   not 
  least 
  the 
  experiments 
  should 
  be 
  conducted 
  

   in 
  a 
  similar 
  manner 
  during 
  a 
  series 
  of 
  successive 
  

   years. 
  

  

  