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Herschel, John in addressee 
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Airy, George Biddell in author 
1840-1849::1840::11 in date 
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From:
George Biddell Airy
To:
Sir John Herschel
Date:
[2 November 1840]
Source of text:
RS:HS 1.90 (C: RGO 6.340.295)
Summary:

Further observations on David Brewster's experiments. On heliometers. Observations on suggestions for Standards.

Contributor:
John Herschel Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[10 November 1840]
Source of text:
RS:HS 1.91
Summary:

On the possibility of obtaining a heliometer from Munich.

Contributor:
John Herschel Project