From:
Sir John Herschel
To:
Humphrey Lloyd
Date:
[21 April 1839]
Source of text:
RS:HS 22.10
Summary:
Responds positively to HL's 1839-4-17, and adds some additional comments.
Contributor:
John Herschel Project
Showing 1–3 of 3 items
Responds positively to HL's 1839-4-17, and adds some additional comments.
About times at which magnetic observations should be made at each observation station.
Passes on the suggestion, from G. B. Airy, of the use of copper rings for damping the movements of measuring instruments in measuring terrestrial magnetism.