Edison in the specifications of his patent application, "that if sufficient elevation be obtained to overcome the curvature of the earth's surface and to reduce to the minimum the earth's absorption, electric telegraphing or signaling between distant... Edison: his life and inventions - Page 830by Frank Lewis Dyer, Thomas Commerford Martin - 1910Full view
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Electrical engineering - 1892
...signals electrically without the interposition of connecting wires. In his specification he states he has discovered that, if sufficient elevation be obtained...on by induction without the use of wires connecting the distant points. This discovery is especially applicable to telegraphing across bodies of water,...