Search: Talbot, William Henry Fox in correspondent 
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Herschel, John in addressee 
letter in document-type 
1840-1849 in date 
John Herschel Project in contributor 
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From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[28 February 1840]
Source of text:
RS:HS 17.300
Summary:

Concerned about the Daguerreotype patent in England, and questions at some length a paper on the origin of freemasonry.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[30 April 1840]
Source of text:
RS:HS 17.301
Summary:

Waxes lyrical about nature, and comments on a new 'positive' paper JH has sent. Refers to JH's move to Hawkhurst.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[15 June 1840]
Source of text:
RS:HS 17.302a
Summary:

Sends a few photographs and says he has read JH's recent memoir. Will comment later.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[1 September 1840]
Source of text:
RS:HS 17.303
Summary:

Concerned with developing photography for tourist use. Doubts that colors of the spectrum can be readily displayed on photographic paper. The'chemistry' of photography is not understood.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[17 March 1841]
Source of text:
RS:HS 17.304a
Summary:

Announces his invention of the 'calotype', and his application for a patent. Questions JH on his address to R.A.S., objecting to idea that universe is infinite.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[18 March 1841]
Source of text:
RS:HS 17.305a
Summary:

Preparing his calotype paper for publication. Looking for a summer house, somewhere interesting to photograph.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[6 April 1841]
Source of text:
RS:HS 17.306a
Summary:

Reports receipt of a communication, which argues that all elements are merely isomers of one substance. Expresses support for such a view.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[19 May 1841]
Source of text:
RS:HS 17.307
Summary:

Some details of improvements in the calotype method.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[12 June 1841]
Source of text:
RS:HS 17.308
Summary:

Sends JH sample of chemicals and paper to make calotype himself.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[1 July 1841]
Source of text:
RS:HS 17.309a
Summary:

Has read WT's paper before the R.S.L. and now complains they will not print it in the R.S.P.T. as they understand it has appeared elsewhere.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[25 July 1841]
Source of text:
RS:HS 17.310a
Summary:

Reports on paper by Samuel Brown to the Royal Society of Edinburgh on the conversion of carbon to silicon, and other transmutations. Reports on discovery of new element, ozone, and complains further about R.S.L. Council.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[18 April 1842]
Source of text:
RS:HS 17.311
Summary:

Sends JH samples of his calotypes. Off to Germany on a photographic expedition.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[2 June 1842]
Source of text:
RS:HS 17.312
Summary:

Carl Steinheil has proposed making telescope mirrors by plating silver on glass. Is writing to JH to tell him that somewhat earlier he had included this process in one of his patents.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[22 March 1843]
Source of text:
RS:HS 17.313
Summary:

JH's account of a comet reminds WT of a strange sighting many years ago. Comments further on improvements in photography, both those made and those needed.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[24 March 1843]
Source of text:
RS:HS 17.314
Summary:

Describes observing of comet that evening.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[29 March 1843]
Source of text:
RS:HS 17.315
Summary:

Suggests 'amphitype' as name for JH's process whereby same picture can go from negative to positive. Further comments on comet sighting, and on some improvements to Daguerreotype.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[5 April 1843]
Source of text:
RS:HS 17.316
Summary:

Comments on JH's positive calotype. Suggests comet may be return of (J.-D.) Cassini's comet of 1668. Gives theorem for finding parabolic orbit of comet if two observations are made in the ecliptic.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[8 September 1844]
Source of text:
RS:HS 17.317
Summary:

Some comments and questions on mathematics.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[16 September 1844]
Source of text:
RS:HS 17.318
Summary:

Comments and questions about a 'cone of the second order' in mathematics.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[20 October 1847]
Source of text:
RAS:JH Archive 10/5.66; Reel 9
Summary:

Grateful for receipt of JH's Cape Results. Sending photographs by several artists to show that 'knowledge of the art is spreading.'

Contributor:
John Herschel Project