To William Crawford Williamson 31 January [1848]
Summary
Thanks WCW for his article ["Microscopical objects found in mud of Levant", Mem. Lit. & Philos. Soc. Manchester 2d ser. 8 (1848):1–128]. Comments on it; offers to send Ascension Island specimens. Urges WCW to re-examine coal-beds for Infusoria to determine whether intervening beds were deposited by sea-, brackish, or fresh water.
Author: | Charles Robert Darwin |
Addressee: | William Crawford Williamson |
Date: | 31 Jan [1848] |
Classmark: | Kōbunzo (dealers) (Mr Sorimachi, bookseller, Tokyo) (no date) |
Letter no: | DCP-LETT-1149 |
From J. D. Hooker 20 February – 16 [March] 1848
Summary
Though correspondence has never ebbed so low, CD is constantly in his thoughts.
Observations on cheetahs used as domesticated hunting animals.
Finds geographical barriers sometimes separate species, but also finds species that remain separate where there are no barriers to migration.
Colour "individuates" isolated animal species.
Plains and alpine animal distribution show altitude not strictly analogous to latitude.
Impact of timber cutting on climate has led to extinction of crocodiles.
Will discuss coal formation in letter to Edward Forbes.
CD often asked whether isolated mountains in southern latitudes had closely allied representatives of Arctic and north temperate plants; JDH has found a representative barberry.
Making for Darjeeling via Calcutta.
Author: | Joseph Dalton Hooker |
Addressee: | Charles Robert Darwin |
Date: | 20 Feb – 16 [Mar] 1848 |
Classmark: | Royal Botanic Gardens, Kew (India letters 1847–51: 52–4 JDH/1/10) |
Letter no: | DCP-LETT-1158 |
To Jean Louis Rodolphe Agassiz 22 October 1848
Summary
Thanks LA and sends thanks to A. A. Gould for specimens. Describes principal findings of his research on cirripedes. Is obliged for information Joseph Leidy gave about cirripede eyes. Describes anatomical features and chief aspects of growth. Describes discovery of parasitic males and a species parasitic upon other cirripedes.
Author: | Charles Robert Darwin |
Addressee: | Jean Louis Rodolphe (Louis) Agassiz |
Date: | 22 Oct 1848 |
Classmark: | Houghton Library, Harvard University (MS Am 1419: 274) |
Letter no: | DCP-LETT-1205 |
To John Stevens Henslow [1 April 1848]
Summary
Thanks JSH for his address [Address delivered in the Ipswich Museum on 9th March 1848]. Questions a sentence which implies that only the practical use of a scientific discovery makes it worth while. The instinct for truth justifies science without any practical results. Cites his work on cirripedes.
Author: | Charles Robert Darwin |
Addressee: | John Stevens Henslow |
Date: | [1 Apr 1848] |
Classmark: | DAR 93: A17 |
Letter no: | DCP-LETT-1167 |
letter | (4) |
Darwin, C. R. | (3) |
Hooker, J. D. | (1) |
Agassiz, Louis | (1) |
Darwin, C. R. | (1) |
Henslow, J. S. | (1) |
Williamson, W. C. | (1) |
Darwin, C. R. | (4) |
Agassiz, Louis | (1) |
Henslow, J. S. | (1) |
Hooker, J. D. | (1) |
Williamson, W. C. | (1) |