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Halley compass variations 1720 - Public domain old map

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Halley compass variations 1720 - Public domain old map

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Summary

Edmond Halley's New and Correct Chart Shewing the Variations of the Compass (1701), the first chart to show lines of equal magnetic variation. See also exhibit G201:1/1 at the UK National Maritime Museum. The NMM scan may however be protected by copyright in the UK.

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Date

1720
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Source

Wikimedia Commons
copyright

Copyright info

public domain

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