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It is transmission by conductance, not by broadcast, so there is no inverse square loss. And I presume he didn't take into account varying soil/rock conditions because he was transmitting through the atmosphere. The ground just acted as a Ground...a vast electron sink. Like it does in many of our systems today.
Phage
The trouble with trying to transmit electricity through earth is that it is frightfully inefficient. Since it is a non- directional system energy loss is phenomenal (inverse square) and that doesn't even take into account the variations in conductivity which occur with varying soil/rock conditions.
Source: Century Illustrated Magazine, June 1900, The Problem of Increasing Human Energy, Nikola Tesla
The most valuable observation made in the course of these investigations was the extraordinary behavior of the atmosphere toward electric impulses of excessive electromotive force. The experiments showed that the air at the ordinary pressure became distinctly conducting, and this opened up the wonderful prospect of transmitting large amounts of electrical energy for industrial purposes to great distances without wires, a possibility which, up to that time, was thought of only as a scientific dream. Further investigation revealed the important fact that the conductivity imparted to the air by these electrical impulses of many millions of volts increased very rapidly with the degree of rarefaction, so that air strata at very moderate altitudes, which are easily accessible, offer, to all experimental evidence, a perfect conducting path, better than a copper wire, for currents of this character.
Thus the discovery of these new properties of the atmosphere not only opened up the possibility of transmitting, without wires, energy in large amounts, but, what was still more significant, it afforded the certitude that energy could be transmitted in this manner economically. In this new system it matters little—in fact, almost nothing—whether the transmission is effected at a distance of a few miles or of a few thousand miles.
Source: Massie, Walter W. & Charles R. Underhill, Wireless Telegraphy & Telephony, Van Nostrand, 1908; "The Future of the Wireless Art"
It is difficult for a layman to grasp how an electric current can be propagated to distances of thousands of miles without diminution of intention. But it is simple after all. Distance is only a relative conception, a reflection in the mind of physical limitation. A view of electrical phenomena must be free of this delusive impression. However surprising, it is a fact that a sphere of the size of a little marble offers a greater impediment to the passage of a current than the whole earth. Every experiment, then, which can be performed with such a small sphere can likewise be carried out, and much more perfectly, with the immense globe on which we live. This is not merely a theory, but a truth established in numerous and carefully conducted experiments. When the earth is struck mechanically, as is the case in some powerful terrestrial upheaval, it vibrates like a bell, its period being measured in hours. When it is struck electrically, the charge oscillates, approximately, twelve times a second. By impressing upon it current waves of certain lengths, definitely related to its diameter, the globe is thrown into resonant vibration like a wire, stationary waves forming, the nodal and ventral regions of which can be located with mathematical precision.
This mode of conveying electrical energy to a distance is not 'wireless' in the popular sense, but a transmission through a conductor, and one which is incomparably more perfect than any artificial one. All impediments of conduction arise from confinement of the electric and magnetic fluxes to narrow channels. The globe is free of such cramping and hinderment. It is an ideal conductor because of its immensity, isolation in space, and geometrical form. Its singleness is only an apparent limitation, for by impressing upon it numerous non-interfering vibrations, the flow of energy may be directed through any number of paths which, though bodily connected, are yet perfectly distinct and separate like ever so many cables. Any apparatus, then, which can be operated through one or more wires, at distances obviously limited, can likewise be worked without artificial conductors, and with the same facility and precision, at distances without limit other than that imposed by the physical dimensions of the globe.
"Missed the boat", hah. Ironic choice of words, considering U.S. Patent 0,613,809, Method of and Apparatus for Controlling Mechanism of Moving Vehicle or Vehicles - 1898 July 1 - Tesla "Boat" patent; Art of controlling the movements and operation of a vessel or vehicle at a distance.
Just another example of how Tesla missed the boat with his lack of understanding of electromagnetic radiation.
The best kept secret is never thought of by the other.
Phage
reply to post by Semicollegiate
The best kept secret is never thought of by the other.
The best kept secret is one that is never thunk at all.
edit on 3/1/2014 by Phage because: (no reason given)
originally posted by: alldaylong
reply to post by ChaoticOrder
Tesla was not the inventor of AC current. That honour goes to Michael Faraday. In fact i would put Faraday ahead of Tesla in many fields. That includes the field of electromagnetism and AC current. Because Faraday was not an American you are not taught about him:-
en.wikipedia.org...
originally posted by: Saibotkram1988
originally posted by: alldaylong
reply to post by ChaoticOrder
Tesla was not the inventor of AC current. That honour goes to Michael Faraday. In fact i would put Faraday ahead of Tesla in many fields. That includes the field of electromagnetism and AC current. Because Faraday was not an American you are not taught about him:-
en.wikipedia.org...
Tesla wasn't American.....!