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To James Croll   19 September 1868

Summary

Discusses papers by JC dealing with erosion. Comments on papers on the subject by J. B. Jukes, A. C. Ramsay, and William Whitaker. Formerly believed in power of the sea. Never fully realised the truth until reading JC’s papers.

Author:  Charles Robert Darwin
Addressee:  James Croll
Date:  19 Sept 1868
Classmark:  DAR 143: 352
Letter no:  DCP-LETT-6380

To James Croll   24 November 1868

Summary

Comments on glaciers in North America.

Asks if glacial periods have occurred alternately in the Northern and Southern Hemispheres. Relevant to his glacial discoveries in South America: "it would have been an immense relief to my mind if I could have assumed … this". CD wishes to discuss subject in new edition of Origin [5th].

Author:  Charles Robert Darwin
Addressee:  James Croll
Date:  24 Nov 1868
Classmark:  DAR 143: 353
Letter no:  DCP-LETT-6473

To James Croll   4 December [1868]

Summary

Acknowledges receipt of book and manuscript.

Author:  Charles Robert Darwin
Addressee:  James Croll
Date:  4 Dec [1868]
Classmark:  American Philosophical Society (Mss.B.D25.)
Letter no:  DCP-LETT-6491

From James Croll   23 September 1868

Summary

Sends two papers; glad CD appreciates two he has already sent. Cannot send two others on glaciers (Philosophical Magazine, 1866 and 1867).

Author:  James Croll
Addressee:  Charles Robert Darwin
Date:  23 Sept 1868
Classmark:  DAR 161: 261
Letter no:  DCP-LETT-6388

From James Croll   2 December 1868

Summary

Sends abstract of his views on change of climate and a copy of a paper.

Author:  James Croll
Addressee:  Charles Robert Darwin
Date:  2 Dec 1868
Classmark:  DAR 161: 262
Letter no:  DCP-LETT-6489

From James Croll   [2 December 1868]

Summary

Glacial climates.

Author:  James Croll
Addressee:  Charles Robert Darwin
Date:  [2 Dec 1868]
Classmark:  DAR 50: E3–8
Letter no:  DCP-LETT-6489F
Document type
letter (6)
Addressee
Correspondent
Croll, James[X]
Darwin, C. R.[X]
Date
1868
09 (2)
11 (1)
12 (3)
letter