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Herschel, John in correspondent 
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From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[1826-1]
Source of text:
RS:HS 17.324
Summary:

Comments on several experiments with spectra passing through glass films.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[4 January 1826]
Source of text:
RS:HS 17.257
Summary:

Asks JH about Dr. Balfour's account in Asiatic Researches about lunar effects on humans in India.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[12 January 1826]
Source of text:
RS:HS 17.258
Summary:

Comments on use of muriate of lime on plants. Also on existence of unexplained bands on film and on presence of red light beyond normal spectrum with light originating from certain sources.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
28 January [1826?]
Source of text:
RS:HS 17.323
Summary:

Questions and comments regarding improvements in microscopy.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[1826-2-8 or later]
Source of text:
Science Museum Talbt 1/1
Summary:

[Responding to WT's 1826-2-7], JH thanks WT for materials sent, makes suggestions regarding WT's upcoming trip to Geneva, and asks WT to deliver a book to [Alfred] Gautier.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[27 February 1826]
Source of text:
RS:HS 17.259
Summary:

Comments on Josef Fraunhofer's work on double stars, on quality and color of light from different sources, refraction of different kinds of light, and solution of a problem in conic sections. Is going to Geneva and Modena soon.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[24 March 1826]
Source of text:
RS:HS 17.260
Summary:

Describes observations made as he travelled and people visited on journey from London to Ancona.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[22 May 1826]
Source of text:
Science Museum Talbt 1/2
Summary:

[Responding to WT's 1826-3-24], JH concurs with P. S. Laplace's view about the advantage of astronomical observation from high elevations, e.g., from mountains. Comments on telescope prices, a paper by WT, Florence, and JH's plan to visit the Continent.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
1826-7
Source of text:
RS:HS 17.261
Summary:

Talks about Josef Fraunhofer's failing health and his making of flint glass.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[24 August 1826]
Source of text:
RS:HS 17.262
Summary:

Is sending on two items directed to JH through WT.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[17 September 1826]
Source of text:
Science Museum Talbt 1/3
Summary:

Thanks WT for bringing to JH Josef Fraunhofer's publications and Franz Gruithuisen's plates. Recounts JH's geologizing in France and JH's efforts to measure solar radiation.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[22 May 1827]
Source of text:
RS:HS 17.263
Summary:

Describes prismatic spectrum of flame of cyanogen and offers to repeat experiment with Michael Faraday for JH's benefit.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[3 July 1827]
Source of text:
RS:HS 17.264
Summary:

Asks JH to clarify what goods are his from a joint order with WT from a German optical firm.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[18 July 1827]
Source of text:
RS:HS 17.265
Summary:

Queries and comments about telescopes and microscopes; some thoughts about a diffraction grating.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[8 August 1827]
Source of text:
RS:HS 17.266
Summary:

Renders an accounting of expenses for optical goods received from Germany.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[1827-8-9 or later]
Source of text:
Science Museum Talbt 1/4
Summary:

Thanks WT for optical equipment sent. Notes death of Augustin Fresnel. Has purchased a telescope from James South.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[29 October 1827]
Source of text:
RS:HS 17.267
Summary:

Writes in favour of a London University professorship for Thomas Key. Refers to some optical experiments of Michael Faraday, and extends solution of conic section problem first raised in WT's letter of 1826-2-27.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[1827-11 or later]
Source of text:
Science Museum Talbt 1/5
Summary:

Responds to WT's 1827-10-29. Sending JH's Light, which uses some of WT's publications.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[31 January 1829]
Source of text:
Science Museum Talbt 1/6
Summary:

Asks about a servant JH is considering hiring to accompany JH on JH's trip to the Continent.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[28 December 1830]
Source of text:
RS:HS 25.1.15
Summary:

Signing certificates for election to fellowship in the R.S.L. at this time [JH having been nominated for President] would be very awkward for JH, so he will not sign for WT.

Contributor:
John Herschel Project