A drawing of a compass in a mid 14th-century copy of Epistola de magnete of Peter Peregrinus. MS. Ashmole 1522, fol. 186r, Bodleian Library
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A drawing of a compass in a mid 14th-century copy of Epistola de magnete of Peter Peregrinus. MS. Ashmole 1522, fol. 186r, Bodleian Library, Oxford.
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