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From:
Sir John Herschel
To:
George Biddell Airy
Date:
1842-1-22 or later
Source of text:
RGO 6.675.271
Summary:

As many Russian observatories are now involved in magnetic observations, JH thinks the British observations should continue [see GA's 1842-1-22].

Contributor:
John Herschel Project
Document type
Transcription available