Origin of Species

@article{PierceOriginOS,
  title={Origin of Species},
  author={N. Pierce},
  journal={Nature},
  volume={94},
  pages={34-34}
}
IN Darwin's great work on this subject he claims that Dean Herbert, in 1822 and 1837, held that “single species of each genus were created in an originally highly plastic condition, and that these have produced, chiefly by intercrossing, but likewise by variation, all our existing species.” 
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