Search: Herschel, John in addressee 
1840-1849::1847 in date 
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From:
Unidentified
To:
Sir John Herschel
Date:
[20 September 1847]
Source of text:
Harvard: Houghton
Summary:

Asks JH about calculations of arcs of meridian.

Contributor:
John Herschel Project
Document type
Transcription available