Search: De Morgan, Augustus in addressee 
Herschel, John in correspondent 
1860-1869::1867::04 in date 
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From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[25 April 1867]
Source of text:
RS:HS 24.193
Summary:

Comments on AD's theorem [see AD's 1867-4-20].

Contributor:
John Herschel Project