“All knowledge or form conception is evoked through the medium of the eye, either in response to disturbances directly received on the retina or to their fainter secondary effects and reverberations. Other sense organs can only call forth feelings which have no reality of existence and of which no conception can be formed.”

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Originally said in English.

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About Nikola Tesla

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Books by Nikola Tesla

My inventions

2007

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Experiments with alternate currents of high potential and high frequency

2007

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The Problem of Increasing Human Energy

1990

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Nikola Tesla

1998

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