Search: Herschel, John in correspondent 
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letter in document-type 
Herschel, John in author 
1840-1849::1843::03::25 in date 
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Herschel3949

From:
Sir John Herschel
To:
Robert Hunt
Date:
[25 March 1843]
Source of text:
George Eastman House, 13.17 (C: RS:HS 22.150)
Summary:

Some comments about photographic processes and about RH's observations of the heavens [see RH's 1843-3-24].

Contributor:
John Herschel Project

Herschel8838

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[25 March 1843]
Source of text:
Science Museum Talbt 1/35 (C: RS:HS 22.149)
Summary:

Comments on confusion between observing comet and zodiacal light. Extensive comments on various materials used in a photographic process where negatives change to positives over long time.

Contributor:
John Herschel Project
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