Search: John Herschel Project in contributor 
Ronalds, Francis in correspondent 
1840-1849::1847::09 in date 
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From:
Sir Francis Ronalds
To:
Sir John Herschel
Date:
[9 September 1847]
Source of text:
RS:HS 14.422
Summary:

Has had a compensating barometer constructed. Requests thoughts concerning compensating barometers. Sends some memos concerning pendulums and other topics.

Contributor:
John Herschel Project
Document type
Transcription available