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Talbot, William Henry Fox in correspondent 
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Herschel, John in author 
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Herschel14848

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[27 March 1839]
Source of text:
NMPFT 1937-4842
Summary:

Describes method of varying the size of photographic images. Praises Talbot's light sensitive paper and suggests improvements regarding it. Complains about persons too ready to seek a patent.

Contributor:
John Herschel Project

Herschel8819

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[22 April 1839]
Source of text:
Science Museum Talbt 1/16 (C: RS:HS 22.11)
Summary:

Comments on several approaches to fixing images on paper, especially using pure water as a fixing agent. Has developed a new sensitive paper but is keeping it secret until perfected. Is leaving for Continent on 1 May.

Contributor:
John Herschel Project

Herschel8820

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[27 April 1839]
Source of text:
Science Museum Talbt 1/17 (draft 'altered': RS:HS 17.293a & C: RS:HS 22.12)
Summary:

JH reports his discovery of a highly sensitive paper. Tint continues to deepen with time, as bromine does not. Not prepared to reveal process at present. Is off to Paris.

Contributor:
John Herschel Project

Herschel8821

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[9 May 1839]
Source of text:
Science Museum Talbt 1/18
Summary:

Just visited L. J. M. Daguerre. Praises his images as 'miraculous' and also Daguerre's times of exposure. Daguerre puts his images on 'thin sheets of plated copper.'

Contributor:
John Herschel Project

Herschel8822

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[24 June 1839]
Source of text:
Science Museum Talbt 1/19 (ACCS: RS:HS 25.5.13 & C: TxU:H/L-0476; Reel 1055)
Summary:

Admires L. J. M. Daguerre's process, but hopes to see paper become dominant medium for photographs. Describes new paper JH developed. [Letter continues 6 July.] Experiment with fixed lines in chemical spectra; shows sensitivity of ultraviolet light.

Contributor:
John Herschel Project

Herschel8823

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[7 July 1839]
Source of text:
Science Museum Talbt 1/20 (ACCS: RS:HS 25.5.14 & C: TxU:H/L-0477; Reel 1055)
Summary:

Recounts experiments with chemicals, spectra, and photographic paper.

Contributor:
John Herschel Project

Herschel8824

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[10 September 1839]
Source of text:
Science Museum Talbt 1/21 (ACCS: RS:HS 25.5.18 & C: TxU:H/L-0478; Reel 1055)
Summary:

Has succeeded in producing a 'photograph on glass.' Describes process and also JH's experiment photographing spectra.

Contributor:
John Herschel Project

Herschel8825

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[4 December 1839]
Source of text:
Science Museum Talbt 1/22
Summary:

Discusses L. J. M. Daguerre's patent application, JH's experiments in making light sensitive paper, and JH's determination to give up photographic researches so as to return to preparation of JH's Cape Results.

Contributor:
John Herschel Project

Herschel8826

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[26 February 1840]
Source of text:
Science Museum Talbt 1/23
Summary:

Waited until after 14 Feb. to submit JH's paper on photography ['On the Chemical Action of the Rays of the Solar Spectrum...,' R.S.P.T. (1840), 1-59]. Will send WT a copy.

Contributor:
John Herschel Project

Herschel1067

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[3 March 1840]
Source of text:
RS:HS 25.6.2
Summary:

Tells WT about JH developing the thermographic paper which is susceptible to 'calorific' and 'chemical' rays of light.

Contributor:
John Herschel Project

Herschel8827

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[19 April 1840]
Source of text:
Science Museum Talbt 1/24
Summary:

Sending specimens sent to JH by [Robert] Hunt. Praises Hunt. Has WT received JH's paper ['On the Chemical Action of the Rays of the Solar Spectrum...,' R.S.P.T. (1840), 1-59]? JH moving to Collingwood.

Contributor:
John Herschel Project

Herschel8828

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[3 May 1840]
Source of text:
Science Museum Talbt 1/25
Summary:

Thanks for excellent pictures WT sent. JH wishes JH had time for further experiments, especially on the 'thermic spectrum.' Praises [Robert] Hunt's results. Recommends experiment to WT.

Contributor:
John Herschel Project

Herschel8829

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[19 June 1840]
Source of text:
Science Museum Talbt 1/26
Summary:

Praises various photographs by WT and notes changes in some. Recounts optical experiments, recent and planned, by JH on rock-salt.

Contributor:
John Herschel Project

Herschel8830

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[30 August 1840]
Source of text:
Science Museum Talbt 1/27 (draft 2pp RS:HS 17.302b & C: RS:HS 22.67)
Summary:

Sends WT a copy of the solar spectrum in which each color is represented clearly in a 'positive' picture. JH sees this as giving hope for color photography.

Contributor:
John Herschel Project

Herschel8831

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[16 March 1841]
Source of text:
Science Museum Talbt 1/28
Summary:

Praises WT for invention of 'Kalotype' process; predicts it will be called 'Talbotype.' Notes excellence for photography of the weather during past year. Mentions possibility of cases of excessively rapid photographic change.

Contributor:
John Herschel Project

Herschel8832

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[22 March 1841]
Source of text:
Science Museum Talbt 1/29 (C: RS:HS 17.304b & 22.81) Buckland, Talbot, 66 inc
Summary:

Congratulates WT on the calotype invention and the patent. Responds at some length to WT's concerns about the infinity of the universe. In postscript, provides a 4-page dialogue on the subject.

Contributor:
John Herschel Project

Herschel8833

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[25 March 1841]
Source of text:
Science Museum Talbt 1/30 (C: RS:HS 17.305b & RS:HS 22.82)
Summary:

A further two dialogues elaborating on JH's earlier arguments [see JH's 1841-3-18] on the infinity/finitude of the universe.

Contributor:
John Herschel Project

Herschel8834

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[6 April 1841]
Source of text:
Science Museum Talbt 1/31 (C: RS:HS 17.306b & 22.83)
Summary:

Doubts that isomerism of all elements can be verified experimentally, but notes a number of groups with similar atomic weights that might well fit. Further on vegetable colors in photography. Refers to enclosure of a further dialogue on infinity.

Contributor:
John Herschel Project

Herschel8835

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[14 May 1841]
Source of text:
Science Museum Talbt 1/32
Summary:

Has been experimenting with paper prepared with light-sensitive vegetable juices. Sends two specimens of JH's results.

Contributor:
John Herschel Project

Herschel8836

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[5 July 1841]
Source of text:
Science Museum Talbt 1/33 (draft: RS:HS 17.309b & C: RS:HS 22.91)
Summary:

Explains the operation of the Council of the R.S.L. and hopes that WT will treat their unintended slight as a 'gaucherie'.

Contributor:
John Herschel Project
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