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Herschel, John in addressee 
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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:
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:
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:
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:
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:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[4 March 1833]
Source of text:
RS:HS 17.268
Summary:

Asks about rumor regarding JH going to Cape. Describes some electrical experiments WT saw at Royal Institution and refers to some WT carried out years earlier.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[9 March 1833]
Source of text:
RS:HS 17.269
Summary:

Asks for seeds and roots of native plants of the Cape. Refers to JH's writings on beating of the heart and comments on some optical experiments of Charles Wheatstone and David Brewster.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[27 March 1833]
Source of text:
RS:HS 17.270
Summary:

Comments on JH's paper on potash in Annales de chimie. Has observed reaction products in microscope. Concerned over delay in publication by David Brewster of his experimental results in optics and light, especially as WT not convinced of legitimacy of rumored results.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[28 May 1833]
Source of text:
RS:HS 17.271
Summary:

Has performed some Newton's rings interference experiments. Asks whether such experiments have already been communicated to the R.S.L.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[31 May 1833]
Source of text:
RS:HS 17.272
Summary:

Trying to understand David Brewster's results on absorption of light in gaseous state, and the dark lines in solar spectrum, the cause of which he misunderstands.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[27 August 1837]
Source of text:
RS:HS 17.273
Summary:

About plant seeds sent by JH from the Cape, WT having sent him some Mexican seeds in return. Halley's Comet only clearly seen on two nights.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[23 May 1838]
Source of text:
RS:HS 17.274
Summary:

Writing to welcome JH home from the Cape.

Contributor:
John Herschel Project