File:Halley compass variations 1702.jpg

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current13:44, 2 May 2008Thumbnail for version as of 13:44, 2 May 2008642 × 800 (150 KB)Jheald{{Information |Description=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.n

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