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Letter from Joseph Davidson to the Board of Longitude, 1790-04-15

Reference Code: GBR/0180/RGO 14/40: 522-523

Scope and Contents

Concerning his proposed method of finding longitude based on drawing a right angle from any point of latitude. Davidson states that his method had been tested on two voyages where it proved exact to within ten miles.


  • Creation: 1790-04-15


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From the Management Group:

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

Language of Materials



Davidson, Joseph

Original geographic information

Hackney [origination]

Original geographic information

London [destination]

Finding aid date

2012-05-30 11:27:33+00:00


Repository Details

Part of the Cambridge University Library Repository

Cambridge University Library
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Cambridge CB3 9DR United Kingdom