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Nikola Tesla, reading Roger Boskovich's book, “Theoria Philosophiae Naturalis”

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Nikola Tesla, with Roger Boskovich's book, “Theoria Philosophiae Naturalis”

Nikola Tesla, with Roger Boskovich's book, “Theoria Philosophiae Naturalis,” in front of the spiral coil of his high-frequency transformer at East Houston St. 46, New York.