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From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
23 [Apr 1861]
Source of text:
DAR 115: 91
Summary:

Lieut. F. W. Hutton’s original review [Geologist 4 (1861): 132–6, 183–8] understands that mutability cannot be directly proved.

CD met Bentham at Linnean Society and asked him to write up his views on mutability.

Opinion of Owen.

Conversation with Lyell on antiquity of man.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
23 [Apr 1861]
Source of text:
DAR 115: 98
Summary:

Offers to go to Henslow despite his own poor health.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Daniel Oliver
Date:
23 Apr [1861]
Source of text:
Newcastle University Special Collections (Spence Watson/Weiss Archive GB186 SW/6/3)
Summary:

Congratulations on DO’s marriage.

Contributor:
Darwin Correspondence Project
Text Online
From:
Michael Faraday
To:
James Timmins Chance
Date:
23 April 1861
Source of text:
RI MS F1 N/4/39
Summary:

No summary available.

Contributor:
Faraday Project
From:
Sir John Herschel
To:
George Biddell Airy
Date:
[23 April 1861]
Source of text:
RGO 6.694.321 (drafts RS:HS 1.252 & 23.329)
Summary:

Asks GA many questions about his magnetical explanation [see GA's 1861-4-22].

Contributor:
John Herschel Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[23 April 1861]
Source of text:
RS:HS 1.253
Summary:

Further remarks concerning his Magnetic Registers [see GA's 1861-4-22].

Contributor:
John Herschel Project