Search: Herschel, John in addressee 
Airy, George Biddell in correspondent 
1850-1859::1856::04::14 in date 
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Herschel4839

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[14 April 1856]
Source of text:
RS:HS 1.228 (C: RGO 6.376.360)
Summary:

Requesting advice on his reflex zenith tube. Regarding progress on 'Standards.'

Contributor:
John Herschel Project
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