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Simpson, G. Wharton in correspondent 
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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
Document type
Transcription available