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  Ever-sporting 
  Varieties 
  

  

  His 
  purpose 
  was 
  the 
  study 
  of 
  partial 
  variabil- 
  

   ity 
  under 
  the 
  influence 
  of 
  climate 
  and 
  soil. 
  In 
  

   every 
  experiment 
  he 
  started 
  from 
  a 
  single 
  indi- 
  

   vidual, 
  divided 
  it 
  into 
  two 
  parts 
  and 
  planted 
  

   one 
  half 
  on 
  a 
  mountain 
  and 
  the 
  other 
  half 
  on 
  

   the 
  plain. 
  The 
  garden 
  cultures 
  were 
  made 
  

   chiefly 
  at 
  Paris 
  and 
  Fontainebleau, 
  the 
  alpine 
  

   cultures 
  partly 
  in 
  the 
  Alps, 
  partly 
  in 
  the 
  Py- 
  

   renees. 
  From 
  time 
  to 
  time 
  the 
  halved 
  plants 
  

   were 
  compared 
  with 
  each 
  other, 
  and 
  the 
  cul- 
  

   tures 
  lasted, 
  as 
  a 
  rule, 
  during 
  the 
  lifetime 
  of 
  the 
  

   individual, 
  often 
  covering 
  many 
  years. 
  

  

  The 
  common 
  European 
  frostweed 
  or 
  Helian- 
  

   thenium 
  vulgare 
  will 
  serve 
  to 
  illustrate 
  his 
  re- 
  

   sults. 
  A 
  large 
  plant 
  growing 
  in 
  the 
  Pyrenees 
  in 
  

   an 
  altitude 
  of 
  2400 
  meters 
  was 
  divided. 
  One 
  half 
  

   was 
  replanted 
  on 
  the 
  same 
  spot, 
  and 
  the 
  other 
  

   near 
  Cadeac, 
  at 
  the 
  base 
  of 
  the 
  mountain 
  range 
  

   (740 
  M.). 
  In 
  order 
  to 
  exclude 
  the 
  effect 
  of 
  a 
  

   change 
  of 
  soil, 
  a 
  quantity 
  of 
  the 
  earth 
  from 
  the 
  

   original 
  locality 
  was 
  brought 
  into 
  the 
  garden 
  

   and 
  the 
  plant 
  put 
  therein. 
  Further 
  control- 
  

   experiments 
  were 
  made 
  at 
  Paris. 
  As 
  soon 
  as 
  

   the 
  two 
  halved 
  individuals 
  commenced 
  to 
  grow 
  

   and 
  produced 
  new 
  shoots, 
  the 
  influence 
  of 
  the 
  

   different 
  climates 
  made 
  itself 
  felt. 
  On 
  the 
  

   mountain, 
  the 
  underground 
  portions 
  remained 
  

   strong 
  and 
  dense, 
  the 
  leaves 
  and 
  internodes 
  

   small 
  and 
  hairy, 
  the 
  flowering 
  stems 
  nearly 
  

  

  