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Herschel, John in addressee 
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1840-1849::1849::03::18 in date 
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From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[18 March 1849]
Source of text:
RS:HS 6.251
Summary:

Regarding the early history of the calendar. Comments on the various versions.

Contributor:
John Herschel Project
Document type
Transcription available