An Account of the Methods Used to Describe Lines, on Dr. Halley's Chart of the Terraqueous Globe;: Shewing the Variation of the Magnetic Needle about the Year 1756, in All the Known Seas; Their Application and Use in Correcting the Longitude at Sea; with Some Occasional Observations Relating Thereto, Volume 3
W. and J. Mount, T. Page and Son, on Tower-Hill., 1758 - Longitude - 18 pages
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