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From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
5 [July 1856]
Source of text:
DAR 114: 166
Summary:

CD cannot swallow continental extensions. Has written to Lyell giving a lengthy criticism of the concept [see 1910] and has asked Lyell to forward the letter to JDH.

Perhaps Aristolochia and Viscum are protandrous.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
5 July [1856]
Source of text:
DAR 114: 167
Summary:

Troubled by JDH’s connection between Antarctic island flora and Fuegia, which CD sees as part of a general relation to southern circumpolar flora. Encloses list [not found] of plants from Tristan d’Acunha.

Contributor:
Darwin Correspondence Project
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From:
John Tyndall
To:
Julia Moore
Date:
Undated
Source of text:
MS 7777/82-82a, Wellcome
Summary:

No summary available.

Contributor:
Tyndall Project
From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
5 July [1856]
Source of text:
American Philosophical Society (Mss.B.D25.133)
Summary:

Discusses theory of submerged continental extensions. Objects that if it is applied to one island, it must be applied to all. Admits that some volcanoes may have been associated with subsidence, in contrast to his former view. Cites evidence from S. American Cordillera. Doubts that elevation associated with volcanoes is merely local, and that great ocean areas are necessarily sinking.

Says he will make his essay [on species] as complete as possible and will discuss CL’s Principles.

Contributor:
Darwin Correspondence Project