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[Cooper, Edward Joshua] in author 
Herschel, John in correspondent 
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From:
[Edward Joshua Cooper]
To:
Sir John Herschel
Date:
[18 January 1840]
Source of text:
RAS:JH Archive 5/4.8 verso; Reel 8
Summary:

Recalls earlier letter in which [EC] made suggestions to JH for improving Daguerreotype.

Contributor:
John Herschel Project
Document type
Transcription available