Nikola Tesla Patents
298 Sub B/ and has proven itself, in my hands and in those of others, to be the most useful and practicable one so far proposed. In this syst system the potential of a point or region of the earth is varied. by imparting to it intermittent or alternative electrifications 5 through one of the terminals of a suitable source of electrical disturbances, which, to heighten the effect, has its other terminal connected to an insulated body, preferably of a large sur1 face and at an elev tion. The electrifications communicated to the earth spread in all directions through the same, reaching 10 a distant circuit, which generally has its terminals arranged. and connected similarly to those of the transmitting source and operates upon a highly sensitive receiver. This method is incomparably superior to those before mentioned in many features, as, for example, in cheapness, simplicity, economy and practi15 cability. By means of it relatively very great differences of potential are obtainable at the terminals of the receiving circuit or device, which permits the operation of the latter at much greater distances, all the more so, as it is both theoretically and practically demonstrated that the intensity of the 20 impulses transmitted diminishes very slowly with the distance. It is an incidental advantage, which is often of no small practical importance, that, with the observance of obvious rules and precautions, the relative position of the receiving and transmitting circuits or devices is of little or no consequence. It is 25 useful to point out the fact, however, that in many instances. when receiving devices have been operated at a distance, results have been erroneously ascribed to other modes of transmission while, in reality, this one was involved. stance, the art Gesla Cancelled рабив брее. Still another method, which was devised and described by me at a later date, is based upon my discovery that the at-the at mospheric air, which behaves as an excellent insulator to cur4 This page retyped from microfilm for better readability - Ed.]
