﻿Experimental 
  Pedigree-Cultures 
  555 
  

  

  tion, 
  partly 
  no 
  doubt 
  to 
  chance, 
  even 
  more 
  mu- 
  

   tants 
  were 
  found 
  this 
  year 
  than 
  in 
  the 
  former. 
  

   Out 
  of 
  some 
  8000 
  seedlings 
  I 
  counted 
  377 
  deviat- 
  

   ing 
  ones, 
  or 
  nearly 
  5#, 
  which 
  is 
  a 
  high 
  propor- 
  

   tion. 
  Most 
  of 
  them 
  were 
  oblong 
  a 
  and 
  lata, 
  the 
  

   same 
  types 
  that 
  had 
  constituted 
  the 
  majority 
  in 
  

   the 
  former 
  year. 
  

  

  Albida, 
  nanella 
  and 
  rubrinervis 
  appeared 
  in 
  

   large 
  numbers, 
  and 
  even 
  scintillans, 
  of 
  which 
  

   I 
  had 
  but 
  a 
  single 
  plant 
  in 
  the 
  previous 
  genera- 
  

   tion, 
  was 
  repeated 
  sixfold. 
  

  

  New 
  forms 
  did 
  not 
  arise, 
  and 
  the 
  capacity 
  of 
  

   my 
  strain 
  seemed 
  exhausted. 
  This 
  conclusion 
  

   was 
  strengthened 
  by 
  the 
  results 
  of 
  the 
  next 
  

   three 
  generations, 
  which 
  were 
  made 
  on 
  a 
  much 
  

   smaller 
  scale 
  and 
  yielded 
  the 
  same, 
  or 
  at 
  least 
  

   the 
  mutants 
  most 
  commonly 
  seen 
  in 
  previous 
  

   years. 
  

  

  Instead 
  of 
  giving 
  the 
  figures 
  for 
  these 
  last 
  

   two 
  years 
  separately, 
  I 
  will 
  now 
  summarize 
  my 
  

   whole 
  experiment 
  in 
  the 
  form 
  of 
  a 
  pedigree. 
  In 
  

   this 
  the 
  normal 
  lamarckiana 
  was 
  the 
  main 
  line, 
  

   and 
  seeds 
  were 
  only 
  sown 
  from 
  plants 
  after 
  suf- 
  

   ficient 
  isolation 
  either 
  of 
  the 
  plants 
  themselves, 
  

   or 
  in 
  the 
  latter 
  years 
  by 
  means 
  of 
  paper 
  bags 
  

   enclosing 
  the 
  inflorescences. 
  I 
  have 
  given 
  the 
  

   number 
  of 
  seedlings 
  of 
  lamarckiana 
  which 
  were 
  

   examined 
  each 
  year 
  in 
  the 
  table 
  below. 
  Of 
  

   course 
  by 
  far 
  the 
  largest 
  number 
  of 
  them 
  were 
  

  

  