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LINES OF MAGNETIC DECLINATION
Edmund Halley, 1701

The famous English astronomer Edmund Halley (after whom Halley’s Comet is named) was the first person to map how compass direction varied over the globe (declination). He published the first chart of compass variations in 1701 (above), after two expeditions around the Atlantic making accurate measurements of the magnetic field.  [source]

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    La declinación magnética esa olvidada línea.
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