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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 Louis Agassiz   15 June [1850]

Summary

Thanks LA for presentation copy of his book, Lake Superior [1850].

Comments on species of cirripedes sent by LA and A. A. Gould.

Author:  Charles Robert Darwin
Addressee:  Jean Louis Rodolphe (Louis) Agassiz
Date:  15 June [1850]
Classmark:  Houghton Library, Harvard University (MS Am 1419: 275)
Letter no:  DCP-LETT-1341

To Louis Agassiz   21 February [1858]

Summary

Thanks LA for presentation copy of Contributions [to the natural history of the United States of America, vol. 1, pt 1: Essay on classification, and vol. 1, pt 2: North American Testudinata (1857)]. Flattered; CD sees there is much of highest interest to him.

Author:  Charles Robert Darwin
Addressee:  Jean Louis Rodolphe (Louis) Agassiz
Date:  21 Feb [1858]
Classmark:  Houghton Library, Harvard University (MS Am 1419: 279)
Letter no:  DCP-LETT-2217

To Louis Agassiz   11 November [1859]

Summary

Sends copy of Origin.

Author:  Charles Robert Darwin
Addressee:  Jean Louis Rodolphe (Louis) Agassiz
Date:  11 Nov [1859]
Classmark:  Houghton Library, Harvard University (MS Am 1419: 276)
Letter no:  DCP-LETT-2519

From Louis Agassiz   29 September 1863

Summary

Introduces J. P. Lesley, "the most accomplished geologist of the United States".

Author:  Jean Louis Rodolphe (Louis) Agassiz
Addressee:  Charles Robert Darwin
Date:  29 Sept 1863
Classmark:  DAR 159: 9
Letter no:  DCP-LETT-4311

To Louis Agassiz   12 April 1864

Summary

Thanks LA for Methods of study [1863].

Is gratified that he has not taken a personal dislike to CD, though he is strongly opposed to nearly everything CD has written.

Author:  Charles Robert Darwin
Addressee:  Jean Louis Rodolphe (Louis) Agassiz
Date:  12 Apr 1864
Classmark:  Houghton Library, Harvard University (MS Am 1419: 277)
Letter no:  DCP-LETT-4460

To Louis Agassiz   1 March [1841]

Summary

Has enjoyed reading LA’s book [Études sur les glaciers (1840)].

Hopes LA will pardon manner in which CD has alluded to his work on glaciers in his Journal of researches, of which he sends a copy.

Author:  Charles Robert Darwin
Addressee:  Jean Louis Rodolphe (Louis) Agassiz
Date:  1 Mar [1841]
Classmark:  Houghton Library, Harvard University (MS Am 1419: 280)
Letter no:  DCP-LETT-593

From Louis Agassiz   22 July 1868

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Summary

LA clarifies his opposition to CD’s views, which does not blind him to the great value of CD’s original researches.

Answers CD’s questions regarding sexual coloration of Amazonian fishes and the protuberances on the head of male Geophagus and Cichla during the spawning season [see Descent, pp. 520, 529].

Author:  Jean Louis Rodolphe (Louis) Agassiz
Addressee:  Charles Robert Darwin
Date:  22 July 1868
Classmark:  DAR 82: B78–9
Letter no:  DCP-LETT-6286

To Louis Agassiz   19 August 1868

Summary

Thanks LA for information on sexual differences in the coloration of Amazonian fish. CD was anxious to know how the sexes differed because they are unusual in that the male has the largest share in looking after ova and young.

Author:  Charles Robert Darwin
Addressee:  Jean Louis Rodolphe (Louis) Agassiz
Date:  19 Aug 1868
Classmark:  Houghton Library, Harvard University (MS Am 1419: 278)
Letter no:  DCP-LETT-6323

From Louis Agassiz   6 July 1869

Summary

Introduces his son Alexander; believes CD will find him "more tractable" on certain questions than LA himself is.

Author:  Jean Louis Rodolphe (Louis) Agassiz
Addressee:  Charles Robert Darwin
Date:  6 July 1869
Classmark:  DAR 159: 10
Letter no:  DCP-LETT-6817
Document type
letter (10)
Addressee
Correspondent
Date
1841 (1)
1848 (1)
1850 (1)
1858 (1)
1859 (1)
1863 (1)
1864 (1)
1868 (2)
1869 (1)
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