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| Keywords: Halley compass variations 1720.jpg Edmond Halley's New and Correct Chart Shewing the Variations of the Compass 1701 the first chart to show lines of equal magnetic variation <p>See also exhibit http //www nmm ac uk/collections/explore/object cfm ID G201 3A1 2F1 G201 1/1 at the UK National Maritime Museum The NMM scan may however be protected by copyright in the UK The English Pilot The Fourth Book London Mount Page 1720 This image was found at http //usm maine edu/maps/exhibit8/17 jpeg in the online exhibition http //www usm maine edu/maps/exhibit8/nrcomp html Charting Neptune's Realm presented by the University of Southern Maine 1720 Edmond Halley Halley compass variations 1702 jpg PD-old-100 Geomagnetism Edmond Halley | ||||
