HCW is trying to define what CD means by "variable" genera.
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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.
HCW is trying to define what CD means by "variable" genera.
Comments on transport of ducks to Jamaica by hurricanes,
fish feeding on seeds,
and sterility of birds in captivity.
Sends account of his successful experiments in feeding wheat seeds to minnows.