A Treatise on Electricity and Magnetism Volume 1 485.jpg
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A Treatise on Electricity and Magnetism Volume 1 485, Electric field lines, A Treatise on Electricity and Magnetism diagrams, A Treatise on Electricity and Magnetism Volume I
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電気及磁性論説巻1 485、電場線、電気及磁性図論、電気及磁性論第1巻
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magnetism nonmagnetic magnetically treatise tract tractive electrical system