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DCP-LETT-6380

From:
Charles Robert Darwin
To:
James Croll
Date:
19 Sept 1868
Source of text:
DAR 143: 352
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.

Contributor:
Darwin Correspondence Project

DCP-LETT-6473

From:
Charles Robert Darwin
To:
James Croll
Date:
24 Nov 1868
Source of text:
DAR 143: 353
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].

Contributor:
Darwin Correspondence Project

DCP-LETT-11097

From:
Charles Robert Darwin
To:
James Croll
Date:
9 Aug 1877
Source of text:
DAR 143: 356
Summary:

Comments on JC’s paper ["On the tidal retardation argument for the age of the earth", Rep. BAAS (1876): 88–9].

Contributor:
Darwin Correspondence Project
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