Supplies facts on the colours of each sex in butterflies from the genera Ornithoptera and Heterochroa.
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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.
Supplies facts on the colours of each sex in butterflies from the genera Ornithoptera and Heterochroa.
Herbert Spencer, though not the scientific thinker he sees himself to be, was extremely important in conditioning the generation’s acceptance of evolution. Compares Spencer and Robert Chambers as teachers, rather than discoverers, of new ideas.