Search: Herschel, John in correspondent 
Talbot, William Henry Fox in correspondent 
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1830-1839::1839::04 in date 
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Herschel1344

From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[10 April 1839]
Source of text:
RS:HS 17.292
Summary:

Sends a sample picture fixed by use of iodine [potash].

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

Herschel1345

From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[27 April 1839]
Source of text:
RS:HS 17.293
Summary:

More photography comments. Problems with use of hyposulfite fixer. Superiority of English over Daguerreotype in being able to make copies.

Contributor:
John Herschel Project
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