In the 1930s inventor Nikola Tesla announced to the world two astonishing new inventions. The first was a particle-beam projector that Tesla intended to be used as an instrument of national defense. He called his system "teleforce." One year later, on July 10, 1935, Tesla claimed a method to transmit mechanical energy with minimal loss over any terrestrial distance, allowing for a new means of communication and a technique for the location of subterranean mineral deposits. He dubbed it the "art of telegeodynamics." These two important papers, hidden for more than 60 years, are presented for the first time in NIKOLA TESLA'S TELEFORCE AND TELEGEODYNAMICS PROPOSALS. The principles behind teleforce the particle-beam weapon, and telegeodynamics the mechanical earth-resonance concept for seismic exploration, are fully addressed. In addition to copies of the original documents, typed on Tesla's official stationery, this work also includes two Reader's Aid sections that guide the reader through the more technical aspects of each paper. The papers are followed by Commentary sections which provide historical background and functional explanations of the two devices. Significant newspaper articles and headline accounts are provided to document the first mention of these proposals. A large Appendix provides a wealth of related material and background information, followed by a Bibliography section and Index.
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The advances described are the result of my research carried on for many years with the chief object of transmitting electrical energy to great distances. The first important practical realization of these efforts was the alternating current power system now in universal use. I then turned my attention to wireless transmission and was fortunate enough to achieve similar success in this fruitful field, my discoveries and inventions being employed throughout the world. In the course of this work, I mastered the technique of high potentials sufficiently for enabling me to construct and operate, in 1899, a wireless transmitter developing up to twenty million volts. Some time before I contemplated the possibility of transmitting such high tension currents over a narrow beam of radiant energy ionizing the air and rendering it, in measure, conductive. After preliminary laboratory experiments, I made tests on a large scale with the transmitter referred to and a beam of ultra-violet rays of great energy in an attempt to conduct the current to the high rarefied strata of the air and thus create an auroral display such as might be utilized for illumination, especially of oceans at night. I found that there was some virtue in the principal but the results did not justify the hope of important practical applications although, some years later, several inventors claimed to have produced a "death ray" in this manner. While the published reports to this effect were entirely unfounded, I believe that with the new transmitter to be built, many wonders will be achieved.
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