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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.
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Sends replies on dogs – sexual differences and preferences.
Discusses the development of horns in reindeer and other deer.
Suggests that Cupples weigh puppies from one week old, rather than two weeks old.
Wishes Cupples had said something about health. Sends regards to Mrs Cupples.
Proportion of sexes in (new-born) lambs equal, but males more likely to die.
Statistics on proportion of sexes in lambs.
On the proportion of sexes in lambs.
Proportion of sexes in lambs, before castration.
Statistics on proportion of sexes of lambs.
Number of lambs born not kept. Counted only at time of castration.
Proportion of sexes in cattle and rats.
WA explains the figures he sent GC. In his experience female lambs at the time of castration outnumber the males. [Robert] Elliot differs.
Information about sexes of sheep at time of castration. Mortality of male lambs higher than that of females.
Responds to questions about sex ratios at birth and mortality in either sheep or cattle before eighteen months.
Appends an eight-year list of lambs for CD’s private information.
Responds to questions about sex ratios at birth and mortality in either sheep or cattle.
Thanks GC for his assistance. "The data for all that I have to say about the Scotch deer-hound are, owing to you, almost sufficient; and much better data than I have got in many other cases." [See Descent 2: 260.]
Believes Dr Stirling would be compelled to admit some change in "the famous protoplasm in our domestic races, both in regard to the structure of the body & qualities of the mind".