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  • sky watcher
    Excerpts from chapter three of Nikola Tesla s autobiography entitled My Inventions. III. MY LATER ENDEAVORS The Discovery of the Rotating Magnetic Field ~snip~
    Message 1 of 1 , Jul 7, 2003
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      Excerpts from chapter three of Nikola Tesla's autobiography entitled My Inventions.




      The Discovery of the Rotating Magnetic Field



      .....I received word that my father wished me to go on a shooting expedition. It was a strange request as he had been always strenuously opposed to this kind of sport. But a few days later I learned that the cholera was raging in that district and, taking advantage of an opportunity, I returned to Gospic in disregard of my parents' wishes. It is incredible how absolutely ignorant people were as to the causes of this scourge which visited the country in intervals of from fifteen to twenty years. They thought that the deadly agents were transmitted thru the air and filled it with pungent odors and smoke. In the meantime they drank the infected water and died in heaps.


      Another one of my projects was to construct a ring around the equator which would, of course, float freely and could be arrested in its spinning motion by reactionary forces, thus enabling travel at a rate of about one thousand miles an hour, impracticable by rail. The reader will smile. The plan was difficult of execution, I will admit, but not nearly so bad as that of a well-known New York professor, who wanted to pump the air from the torrid to the temperate zones, entirely forgetful of the fact that the Lord had provided a gigantic machine for this very purpose.


      It was in the second year of my studies that we received a Gramme dynamo from Paris, having the horseshoe form of a laminated field magnet, and a wire-wound armature with a commutator. It was connected up and various effects of the currents were shown. While Prof. Poeschl was making demonstrations, running the machine as a motor, the brushes gave trouble, sparking badly, and I observed that it might be possible to operate a motor without these appliances. But he declared that it could not be done and did me the honor of delivering a lecture on the subject, at the conclusion of which he remarked: "Mr. Tesla may accomplish great things, but he certainly never will do this. It would be equivalent to converting a steadily pulling force, like that of gravity, into a rotary effort. It is a perpetual motion scheme, an impossible idea."" But instinct is something which transcends knowledge. We have, undoubtedly, certain finer fibers that enable us to perceive truths when logical deduction, or any other willful effort of the brain, is futile. For a time I wavered, imprest by the professor's authority, but soon became convinced I was right and undertook the task with all the fire and boundless confidence of youth.


      In 1899, when I was past forty and carrying on my experiments in Colorado, I could hear very distinctly thunderclaps at a distance of 550 miles. The limit of audition for my young assistants was scarcely more than 150 miles. My ear was thus over thirteen times more sensitive....in Budapest I could heare the ticking of a watch with three rooms between me and the time-piece...sun's rays, when periodically intercepted, would cause blows of such force on my brain that they would stun me....in the dark I had the sense of a bat and could detect the presence of an object at a distance of twelve feet by a peculiar creepy sensation on the forehead.


      One afternoon, which is ever present in my recollection, I was enjoying a walk with my friend in the City Park and reciting poetry. At that age I knew entire books by heart, word for word. One of these was Goethe's "Faust." The sun was just setting and reminded me of the glorious passage:

      "Sie ruckt und weicht, der Tag ist uberlebt,

      Dort eilt sie hin und fordert neues Leben.

      Oh, dass kein Flugel mich vom Boden hebt

      Ihr mach und immer nach zu streben! 1

      * * *

      Ein schoner Traum indesen sie entweicht,

      Ach, zu des Geistes Flugeln wird so leicht

      Kein korperlicher Flugel sich gesellen!" 2

      As I uttered these inspiring words the idea came like a flash of lightning and in an instant the truth was revealed. I drew with a stick on the sand the diagrams shown six years later in my address before the American Institute of Electrical Engineers, and my companion understood them perfectly. The images I saw were wonderfully sharp and clear and had the solidity of metal and stone, so much so that I told him: "See my motor here; watch me reverse it." I cannot begin to describe my emotions. Pygmalion seeing his statue come to life could not have been more deeply moved. A thousand secrets of nature which I might have stumbled upon accidentally I would have given for that one which I had wrested from her against all odds and at the peril of my existence.


      1 "The glow retreats, done is the day of toil;

      It yonder hastes, new fields of life exploring;

      Ah, that no wing can lift me from the soil

      Upon its track to follow, follow soaring!"


      2 A glorious dream! though now the glories fade.

      Alas! the wings that lift the mind no aid

      Of wings to lift the body can bequeath me."



      The Autobiography of Nikola Tesla, can be found at http://www.amazon.com



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