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Richardson, Thomas W. in correspondent 
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From:
Thomas W. Richardson
To:
Sir John Herschel
Date:
[21 April 1862]
Source of text:
RS:HS 14.488
Summary:

Sends sketch of reflecting camera and describes its composition. Can now make reflectors under 7 inches very inexpensively.

Contributor:
John Herschel Project
Document type
Transcription available