Asks whether crossing breeds of hive-bees is advantageous
and whether different pigeon breeds have different incubation periods.
Explains and apologises for the lack of detailed quotations in Origin.
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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.
Asks whether crossing breeds of hive-bees is advantageous
and whether different pigeon breeds have different incubation periods.
Explains and apologises for the lack of detailed quotations in Origin.
Thanks for information on pigeon hatching
and on drones.
Believes occasional crosses indispensable.