Text: "Nikola Tesla tells of new radio theories - does not believe in Hertz waves and Heaviside layer, interview discloses." Coronal discharge from vacuum tube indicates there must be a medium besides air in the space. New York Herald Tribune. Sept. 22, 1929. p. 1, 21, col. II.

See Also: Nikola Tesla, ether, vacuum energy, longitudinal waves.

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