Nikola Tesla - Free-Energy Devices

HIGH FREQUENCY AND HIGH POTENTIAL CURRENTS. 349to work in synchronism with the latter, and the vibration thusintensified and spread over a large area, or a flow of electricityproduced to or from the source s t if the same be ofopposite phase to the source s. I think that beyond doubtit is possible to operate electrical devices in a city throughthe ground or pipe system by resonance from an electricaloscillator located at a central point. But the practical solutionof this problem would be of incomparably smaller benefit to manthan the realization of the scheme of transmitting intelligence, orperhaps power, to any distance through the earth orenvironingmedium. If this is at all possible, distance does not mean anything.Proper apparatus must first be produced by means ofwhich the problem can be attacked and I have devoted muchthought to this subject. I am firmly convinced that it can bedone and hope that we shall live to see it done.ON THE LIGHT PHENOMENA PRODUCED BY HIGH-FREQUENCY CUR-RENTS OF HIGH POTENTIAL AND GENERAL REMARKS RELATINGTO THE SUBJECT.Returning now to the lighteffects which it has been the chiefobject to investigate, it is thought proper to divide these effectsinto four classes : 1. Incandescence of a solid. 2. Phosphorescence.3. Incandescence or phosphorescence of a rarefied gas and;4. Luminosity produced in a gas at ordinary pressure. The firstquestion How is are these luminous effects produced : ? In orderto answer this question as satisfactorilyas I am able to do in thelight of accepted views and with the experience acquired, and toadd some interest to this demonstration, I shall dwell here upona feature which I consider of great importance, inasmuch as itpromises, besides, to throw a better light upon the nature of mostof the phenomena produced by high-frequency electric currents.I have on other occasions pointed out the great importance of thepresence of the rarefied gas, or atomic medium in general, aroundthe conductor through which alternate currents of high frequencyare passed, as regards the heating of the conductor by the currents.My experiments, described some time ago, have shownthat, the higher the frequency and potentialdifference of the currents,the more important becomes the rarefied gasin which theconductor is immersed, as a factor of the heating. The potentialdifference, however, is, as I then pointed out, a more im-