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Darwin, C. R. in correspondent 
1840-1849 in date 
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From:
Charles Robert Darwin
To:
Sir John Herschel
Date:
[4 February 1848]
Source of text:
RS:HS 6.11
Summary:

As JH has accepted the superintendency of the Admiralty Manual he will try to undertake the geological part, but it will take time as he is busy on another project.

Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
John Frederick William Herschel, 1st baronet
Date:
4 Feb 1848
Source of text:
The Royal Society (HS6: 11)
Summary:

Undertakes to write geological part of Admiralty Instructions [A manual of scientific enquiry (1849), Collected papers 1: 227–50]. Has doubts as to his success.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Sir John Herschel
Date:
21] March [1848
Source of text:
RS:HS 6.14
Summary:

Has forwarded JH's note to Robert Mallet, who no doubt will compress his part. Encloses his own part,which he fears may be too long. Would like a chance to see the proofs. When completed would like several copies.

Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
John Frederick William Herschel, 1st baronet
Date:
[21 Mar 1848]
Source of text:
The Royal Society (HS6: 14)
Summary:

Sends MS of his chapter on geology for Manual [Collected papers 1: 227–50]. Fears it may be too long. Does not much like it but can do no better. After hesitation, has recommended books. Defends his point that mere collection of rock specimens is "of hardly any use to Geology".

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Sir John Herschel
Date:
7 May [1848]
Source of text:
RS:HS 6.15
Summary:

Sends his manuscript. P.O. has been unable to trace the missing parcel. Comments on J. B. Elie de Beaumont's method of measuring lava streams; emphasizes the importance of repeated observations. Would like copies of the manual when completed.

Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
John Frederick William Herschel, 1st baronet
Date:
7 May [1848]
Source of text:
The Royal Society (HS6: 15)
Summary:

Sends MS of "Geology" for Manual [Collected papers 1: 227–50]. First parcel lost. Asks JFWH to give advice on an unclear note, translated from Élie de Beaumont, on measuring incline of lava-flows.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Sir John Herschel
Date:
[11 May 1848]
Source of text:
RS:HS 6.12
Summary:

As JH is interested in colors he sends him details of the color changes that the genus Ibla undergoes. Will send him a specimen if desired.

Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
John Frederick William Herschel, 1st baronet
Date:
11 May [1848]
Source of text:
The Royal Society (HS6: 12)
Summary:

Describes colour changes from blue to red in valves of operculum of the cirripede genus Ibla.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Sir John Herschel
Date:
[6 June 1848]
Source of text:
RS:HS 6.13
Summary:

Encloses samples of the Ibla. Outlines the method of making it change color. Hopes he will not have to re-write his geological chapter for the Admiralty Manual.

Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
John Frederick William Herschel, 1st baronet
Date:
6 June [1848]
Source of text:
The Royal Society (HS6: 13)
Summary:

Sends two valves of Ibla.

In his chapter [for Manual, Collected papers 1: 227–50], he will strike out any part that JFWH wants struck out, but if much shortening is required it will need rewriting.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Sir John Herschel
Date:
13 June [1849]
Source of text:
RS:HS 6.16
Summary:

Thanks for his obliging note. Has already had one from John Murray. Hopes the Admiralty Manual will bear fruit. Has been at Malvern for three months and his health has improved enormously.

Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
John Frederick William Herschel, 1st baronet
Date:
13 June [1849]
Source of text:
The Royal Society (HS6: 16)
Summary:

Thanks JFWH for the trouble he has taken to correct printing error in "Geology".

Discusses Dr Gully’s water-cure.

Contributor:
Darwin Correspondence Project