Tesla Coil - from our story 'Nikola Tesla: Lighting Up Mark Twain, The AC/DC Mash-Up And Visions Of The Future'

A thermoelectric coil developed by Serbian American inventor and electrical engineer, Nikola Tesla (1856 - 1943), circa 1895. (Photo by Albert Harlingue/Roger Viollet/Getty Images)

A thermoelectric coil developed by Serbian American inventor and electrical engineer, Nikola Tesla (1856 - 1943), circa 1895. (Photo by Albert Harlingue/Roger Viollet/Getty Images)

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