Discusses earthworm activity observed in old ploughed fields.
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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 earthworm activity observed in old ploughed fields.
His rabbits have lost their patches and are grey.
Has FG seen William Crookes [spiritualist]?
Discusses the problems of mimicry as related to natural selection; the general variability of colour as a character; and the conditions necessary for natural selection to fix firmly a character.
Encloses a Fritz Müller letter speculating that organisms respond to certain colours because of the prevalence of those colours in their environment.
Louis Agassiz is going on a voyage to the Falklands, and BJS wonders whether it is worth while telling him of the Gallegos fossil bed so that he can investigate.