﻿CHARLES 
  DARWIN 
  

  

  Charles 
  Darwin 
  (b. 
  ISi 
  I'.i 
  ; 
  d 
  . 
  1882) 
  for 
  twenty-two 
  years 
  collected 
  data 
  upon 
  problems 
  

   of 
  competition, 
  variation, 
  survival, 
  and 
  heredity; 
  then 
  (1858), 
  together 
  with 
  A. 
  R. 
  

   Wallace 
  (b. 
  1822; 
  d. 
  1913), 
  presented 
  his 
  essay, 
  "Origin 
  of 
  Species, 
  or 
  Preserva- 
  

   tion 
  of 
  Favored 
  Races 
  in 
  the 
  Struggle 
  for 
  Life"; 
  published 
  his 
  epoch-making 
  

   book, 
  " 
  On 
  the 
  Origin 
  of 
  Species," 
  in 
  1859, 
  and 
  afterwards 
  published 
  many 
  vol- 
  

   umes 
  containing 
  a 
  great 
  mass 
  of 
  data 
  bearing 
  upon 
  the 
  evolution 
  of 
  plants 
  and 
  

   animals. 
  Darwin 
  was 
  an 
  unsurpassed 
  investigator; 
  his 
  rule 
  of 
  observing 
  without 
  

   prejudice 
  and 
  of 
  adopting 
  no 
  conclusion 
  except 
  on 
  a 
  basis 
  of 
  observed 
  facts, 
  his 
  

   fearlessness 
  in 
  following 
  truth, 
  his 
  revulsion 
  at 
  known 
  error, 
  furnished 
  an 
  invalu- 
  

   able 
  contribution 
  toward 
  the 
  scientific 
  method 
  of 
  study 
  in 
  biology 
  

  

  