Nikola Tesla relaxes below a flamelike electric discharge from a tuned helix

THE WIZARD RELAXES — Nikola Tesla relaxes below a flamelike electric discharge from a tuned helix coupled to the primary of a giant oscillator in this drawing by Gazette Telegraph staff artist John Peterson. The oscillator, the largest “Tesla Coil” ever constructed, was built in his Colorado Springs laboratory, in a successful attempt to transmit wireless power by changing the earth's electric charge.