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                He went on to make a distinction 
                between his invention and those brought forward by others. He 
                claimed that his device did not use any so-called "death 
                rays" because such radiation cannot be produced in large 
                amounts and rapidly become weaker over distance. He likely was 
                making reference to a Grindell-Matthews type of device that, according 
                to contemporary reports, used a powerful ultra-violet beam to 
                make the air conducting so that high energy current could be directed 
                to the target. The range of an ultra-violet 
                searchlight would be much less than what Tesla was claiming. As 
                he put it: "all the energy of New York City (approximately 
                two million horsepower [1.5 billion watts]) transformed into rays 
                and projected twenty miles, would not kill a human being." 
                
              Not wanting to give away a potentially 
                valuable creation in an interview, he was intentionally opaque 
                concerning the details of his design. He did clarify how his design 
                differed from the ray type of devices. 
                 
                 
              My apparatus 
                projects particles which may be relatively large or of microscopic 
                dimensions, enabling us to convey to a small area at a great distance 
                trillions of times more energy than is possible with rays of any 
                kind. Many thousands of horsepower can be thus transmitted by 
                a stream thinner than a hair, so that nothing can resist. 
                 
                  
               
               
                 
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               If Tesla's energy weapon cannot be called a "ray" device, but 
                as one projecting microscopic particles, it would seem that it 
                had to differ from the other designs in one of two ways. Either 
                he was making the distinction between a beam of radiant energy, 
                like a beam from a flashlight that has billions of energy carrying 
                photons, and his own with all of its energy concentrated into 
                a stream a single particle wide, or he was making a distinction 
                about the size of the beam and the method it is used to reach 
                the target. 
              In a Grindell-Matthews type of beam, the flashlight model, a huge number 
                of high energy particles or photons would have to be sent out 
                from the system so that a large enough area on the target would 
                be covered to disable it. What Tesla seems to have intended was 
                that his energy transmitter would set up a field of force around 
                itself which, when penetrated, would release its energy directly 
                to the target. The effect would be like sending a current of particles 
                through a wire directly to the target. A large area on the target 
                would not have to be "painted" by a beam, so the current 
                reaching the intruder could be very thin and deliver a great deal 
                of energy to a small area. 
              The Colorado tests 
                that gave rise to the variety of "death ray" inventions 
                in the U.S. and Europe may have lead to the development of a much 
                more powerful weapon. 
                 
                 
              When Tesla realized that economic forces would not allow the development 
                of a new type of electrical generator that would supply power 
                without burning fuel he "was led to recognize [that] the 
                transmission of electrical energy to any distance through the 
                media as by far the best solution of the great problem of harnessing 
                the sun's energy for the use of man."(15),(16) 
                His idea was that a relatively few generating plants 
                located near waterfalls would supply his very high energy transmitters 
                which, in turn, would send power through the earth to be picked 
                up wherever it was needed. 
              Receiving energy from this high pressure reservoir only would require 
                a person to put a rod into the ground and connect it to a receiver 
                operating in resonance with the electrical motion in the earth. 
                As Tesla described in 1911, "The entire apparatus for lighting 
                the average country dwelling will contain no moving parts whatever, 
                and could be readily carried about in a small valise."(17) 
              The difference between a current used to "light 
                the average country dwelling" and a current used as a method 
                of destruction, however, is a matter of timing. If the amount 
                of electricity used to run a television for an hour is released 
                in a millionth of a second, it would have a very different, and 
                negative, effect on the television. 
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