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Letter from H.C. Jennings on insulating the magnetic needle, 1817-08-12

Reference Code: GBR/0180/RGO 14/31: 204-205

Scope and Contents

Letter to the Board of Longitude on his discovery of a method of insulating the magnetic needle to protect the compass from the effects of magnetic deviation.


  • Creation: 1817-08-12


Conditions Governing Access

From the Management Group:

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2 folio(s) (2 ff.) : Paper

Language of Materials



Jennings, H.C.

Original geographic information

London [destination]

Original geographic information

London [origination]

Finding aid date

2012-06-11 14:29:35+00:00


Repository Details

Part of the Cambridge University Library Repository

Cambridge University Library
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Cambridge CB3 9DR United Kingdom