Discusses two factors possibly causing modification of body or mind of an organism; habit and direct action of external conditions on the one hand, and selection, natural or artificial, on the other; considers their relative importance.
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Discusses two factors possibly causing modification of body or mind of an organism; habit and direct action of external conditions on the one hand, and selection, natural or artificial, on the other; considers their relative importance.