Tesla was a sphere earther, by the way.
Here's a better image of his drawings.
Note that his radio tower is on the top of a globe. Those are his drawings. YOu can fact check this if you wish. As you should want to.
Here are some more of Tesla's quotes throughout his life.
This metal, it would seem, has an origin entirely different from that of the rest of the globe.
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It is a well-known fact that the interior portions of the globe are very hot, the temperature rising, as observations show, with the approach to the center at the rate of approximately 1 degree C. for every hundred feet of depth. The difficulties of sinking shafts and placing boilers at depths of, say, twelve thousand feet, corresponding to an increase in temperature of about 120 degrees C., are not insuperable, and we could certainly avail ourselves in this way of the internal heat of the globe.
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By realizing such a plan, we should be enabled to get at any point of the globe a continuous supply of energy, day and night
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The observation of this wonderful phenomenon impressed me strongly that communication at any distance could be easily effected by its means, provided that apparatus could be perfected capable of producing an electric or magnetic change of state, however small, in the terrestrial globe or environing medium.
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"The Problem of Increasing Human Energy with Special References to the Harnessing of the Sun's Energy" in Century Illustrated Magazine (June 1900)
http://www.tfcbooks.com/tesla/1900-06-00.htm
Please fact check before you use someone's ideas to push your own belief system. It's insulting to both the person whose ideas you are using, and the audience you are writing to.