JH to visit CP's house. CP suggests they both visit J. P. Gassiot, where they might also meet with Michael Faraday. Asks JH if there are experiments he would like to see during visit. Reports observing Fraunhofer lines through a prism.
JH to visit CP's house. CP suggests they both visit J. P. Gassiot, where they might also meet with Michael Faraday. Asks JH if there are experiments he would like to see during visit. Reports observing Fraunhofer lines through a prism.
Committee on Physics will meet 2 May.
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Asks that A. d’Orbigny’s geological map of S. America be sent to him with a card of the Society’s evening meetings.
Queries on ratios of species to genera on southern islands. CD’s observations on distribution of Galapagos organisms, and on S. American fossils, and facts he has gathered since, lead him to conclusion that species are not immutable; "it is like confessing a murder".
Discusses sending HD lice specimens. Asks him to check with G. R. Waterhouse.
Discusses books returned
and invites him to Down for a few days.
Delighted to be able to contribute Infusoria to ED’s "great countryman Ehrenberg". Includes a list of eight substances from his collection described in detail, which Ehrenberg might find useful in his researches.
C. G. Ehrenberg would like some earth from Galapagos, Tierra del Fuego, and the Falklands; wishes to hunt for Infusoria.
Thanks for information for Ehrenberg.