The Letter of Petrus Peregrinus on the Magnet, A.D. 1269 — THE LETTER OF PETRUS PEREGRINUS ON THE MAGNET, A.D. 1269

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The Letter of Petrus Peregrinus on the Magnet, A.D. 1269 THE LETTER OF PETRUS PEREGRINUS ON THE MAGNET, A.D. 1269 · ch 1/19

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