Nikola Tesla was the Serbian born, American emigrant who became perhaps the most famous electrical and mechanical engineer of all times. After graduating from the University of Prague, he worked for the Yugoslavian government for a year setting up the country’s first telephone system. In 1883, Tesla moved to Paris where he worked for Thomas Edison’s subsidiary, after which he moved to New York where he could work directly with Edison. Tesla worked for Edison only a short time before but the two men came to realize their approaches were quite different, and went their separate ways. Tesla’s contributions to the area of electrical power utilization cannot be understated.
"The changes I noted were taking place periodically and with such a clear suggestion of number and order that they were not traceable to any cause known to me. I was familiar, of course, with such electrical disturbances as are produced by the sun, Aurora Borealis, and earth currents, and I was as sure as I could be of any fact that these variations were due to none of these causes.“
"The nature of my experiments precluded the possibility of the changes being produced by atmospheric disturbances, as has been rashly asserted by some. It was sometime afterward when the thought flashed upon my mind that the disturbances I had observed might be due to an intelligent control.
"Although I could not at the time decipher their meaning, it was impossible for me to think of them as having been entirely accidental. The feeling is constantly growing on me that I had been the first to hear the greeting of one planet to another. A purpose was behind these electrical signals (Swartz, 2001).”
Barksdale, M. 10 Inventions by Thomas Edison (That You've Never Heard Of).
Peterson, G.L. (1996-2005) Nikola Tesla; A Man of Comprehensive Solutions.