Search: Herschel, John in correspondent 
Simpson, G. Wharton in correspondent 
1860-1869::1866 in date 
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Herschel3240

From:
G. Wharton Simpson
To:
Sir John Herschel
Date:
[12 May 1866]
Source of text:
RS:HS 17.210
Summary:

Wishes to ascertain certain facts for article on history and aspects of photography. Especially, asks where to find first record of JH and [Louis] Daguerre using hyposulfite of soda for fixing photographs.

Contributor:
John Herschel Project

Herschel3373

From:
G. Wharton Simpson
To:
Sir John Herschel
Date:
[14 May 1866]
Source of text:
RS:HS 17.211
Summary:

Thanks JH for helping to clarify origins of Louis Daguerre's use of hyposulfite of soda for fixing photographs. Provides further information on photography, particular solar microscope photography.

Contributor:
John Herschel Project
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