From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[11 November 1848]
Source of text:
RS:HS 23.50
Summary:
Asks for reference to date of discovery of the moon's variation by Aboul Wefa.
Contributor:
John Herschel Project
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Asks for reference to date of discovery of the moon's variation by Aboul Wefa.