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Erman, Georg Adolph in addressee 
1870-1879::1870 in date 
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Herschel9351

From:
Sir John Herschel
To:
Georg Adolph Erman
Date:
[24 May 1870]
Source of text:
RS:HS 24.315
Summary:

About an application to the B.A.A.S. for a grant to fund the calculations related to reducing the magnetic observations of 1847-48.

Contributor:
John Herschel Project

Herschel9352

From:
Sir John Herschel
To:
Georg Adolph Erman
Date:
[7 October 1870]
Source of text:
RS:HS 24.332
Summary:

Writes to clarify the actions of the B.A.A.S. [see JH's 1870-5-24].

Contributor:
John Herschel Project

Herschel1092

From:
Sir John Herschel
To:
Georg Adolph Erman
Date:
[12 October 1870]
Source of text:
RS:HS 25.7.7
Summary:

Corrects a misunderstanding about the date to which magnetic observations are to be reduced.

Contributor:
John Herschel Project
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