Search: Herschel, John in correspondent 
Argelander, F. W. A. in correspondent 
1860-1869::1864 in date 
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From:
Sir John Herschel
To:
F. W. A. Argelander
Date:
[28 January 1864]
Source of text:
RS:HS 24.27
Summary:

Thanks for FA's star atlas series, one of which is a duplicate; reports apparent variation of a nebula.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
F. W. A. Argelander
Date:
[30 January 1864]
Source of text:
RS:HS 24.28
Summary:

Mistaken about seeming duplicate [see JH's 1864-1-28].

Contributor:
John Herschel Project