Letter from Don Josef de Porras y Ruiz, 1783-08-18
Scope and Contents
Correspondence regarding the effects of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.
Dates
- Creation: 1783-08-18
Creator
Conditions Governing Access
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Extent
18 folio(s) (18 ff.) : Paper
Language of Materials
Spanish; Castilian
Originator(s)
Porras y Ruiz, Josef
Original geographic information
London [destination]
Original geographic information
Madrid [origination]
Finding aid date
2011-12-17 10:56:39+00:00
Repository Details
Part of the Cambridge University Library Repository
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