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Lloyd, Humphrey in addressee 
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Herschel1162

From:
Sir John Herschel
To:
Humphrey Lloyd
Date:
1839-3-[15 or earlie
Source of text:
RS:HS 25.14.20
Summary:

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.

Contributor:
John Herschel Project

Herschel11586

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

Herschel11588

From:
Sir John Herschel
To:
Humphrey Lloyd
Date:
[7 August 1839]
Source of text:
RS:HS 22.25
Summary:

About times at which magnetic observations should be made at each observation station.

Contributor:
John Herschel Project
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