The Letter of Petrus Peregrinus on the Magnet, A.D. 1269 — CHAPTER IX WHY THE NORTH POLE OF ONE LODESTONE ATTRACTS THE SOUTH POLE OF ANOTHER AND VICE VERSA

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The Letter of Petrus Peregrinus on the Magnet, A.D. 1269 CHAPTER IX WHY THE NORTH POLE OF ONE LODESTONE ATTRACTS THE SOUTH POLE OF ANOTHER AND VICE VERSA · ch 11/19

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