A discours of the variation of the cumpas, or magneticall needle. : Wherin is mathematically shewed, the maner of the obseruation, effectes, and application thereof,

Borough, William, 1536-1599 · 1581 · [London] : Imprinted at London for Richard Ballard, and are to be solde at his shop at Sainct Magnus cornar in Themes streate · 8 pictures

Compass · Nautical astronomy · Imprint 1581

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