A Treatise on Electricity and Magnetism Volume 1 471.jpg
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A Treatise on Electricity and Magnetism Volume 1 471, Electric potential, Electric field lines, A Treatise on Electricity and Magnetism diagrams, A Treatise on Electricity and Magnetism Volume I
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電気及磁性論第1巻471号、電位、電場線、電気及磁性図論、電気及磁性論第1巻
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nonmagnetic magnetism electric potential magnetically volume unit treatise tract potential unit tractive electrical system negative charge straight-line method