﻿Inconstancy 
  of 
  Improved 
  Races 
  795 
  

  

  with 
  the 
  experiments 
  of 
  Nageli, 
  Bonnier 
  and 
  

   others, 
  each 
  single 
  individual 
  may 
  change 
  its 
  

   habits 
  and 
  its 
  aspect 
  in 
  response 
  to 
  transplanta- 
  

   tion. 
  The 
  climate 
  has 
  an 
  exceedingly 
  great 
  in- 
  

   fluence 
  on 
  each 
  individual, 
  but 
  the 
  continuance 
  

   of 
  this 
  influence 
  is 
  without 
  permanent 
  result. 
  

  

  So 
  much 
  concerning 
  ever-sporting 
  varie- 
  

   ties 
  and 
  double 
  adaptations. 
  We 
  now 
  come 
  to 
  

   the 
  effects 
  of 
  a 
  continuous 
  selection 
  of 
  simple 
  

   characters. 
  

  

  Here 
  the 
  sugar-beets 
  stand 
  preeminent. 
  

   Since 
  Vilmorin's 
  time 
  they 
  have 
  been 
  selected 
  

   according 
  to 
  the 
  amount 
  of 
  sugar 
  in 
  their 
  roots, 
  

   and 
  the 
  result 
  has 
  been 
  the 
  most 
  striking 
  that 
  

   has 
  ever 
  been 
  attained, 
  if 
  considered 
  from 
  the 
  

   standpoint 
  of 
  practice. 
  But 
  if 
  critically 
  exam- 
  

   ined, 
  with 
  no 
  other 
  aim 
  than 
  a 
  scientific 
  appre- 
  

   ciation 
  of 
  the 
  improvement 
  in 
  comparison 
  with 
  

   other 
  processes 
  of 
  selection, 
  the 
  support 
  of 
  the 
  

   evidence 
  for 
  the 
  theory 
  of 
  accumulative 
  influ- 
  

   ence 
  proves 
  to 
  be 
  very 
  small. 
  

  

  The 
  amount 
  of 
  sugar 
  is 
  expressed 
  by 
  percent- 
  

   age-figures. 
  These 
  however, 
  are 
  dependent 
  on 
  

   various 
  causes, 
  besides 
  the 
  real 
  quantity 
  of 
  su- 
  

   gar 
  produced. 
  One 
  of 
  these 
  causes 
  is 
  the 
  quan- 
  

   tity 
  of 
  watery 
  fluid 
  in 
  the 
  tissues, 
  and 
  this 
  in 
  its 
  

   turn 
  is 
  dependent 
  on 
  the 
  culture 
  in 
  dryer 
  or 
  

   moister 
  soil, 
  and 
  on 
  the 
  amount 
  of 
  moisture 
  in 
  

   the 
  air, 
  and 
  the 
  same 
  variety 
  of 
  sugar-beets 
  

  

  