by Marc Seifer
With the development of the photographic process, the first wireless pictures were sent in 1898 by Küster and G. Williams, “but the arrangements involved the employment of Hertz waves and were impractable.” In 1892, Tesla recalled many years later, “the attention of the scientific world was directed to a wonderfully sensitive receiver, consisting of an electron stream maintained in a delicately balanced condition in a vacuum bulb, by means of which it was proposed to use photography in the transmission of telegraphic and telephonic messages through the Atlantic cables, and later also by wireless.”
In 1904, Dr. Arthur Korn, an electrical engineer from the University of Munich, gained the attention of the scientific community when he successfully transmitted wire photos from Munich to Nuremburg. According to Korn, who is often credited as the inventor of the television tube, the apparatus utilized “Tesla currents.”7 Tesla notes that once Korn introduced “a sensitive place [and] a selenium cell to vary the intensity of the sending current,” the process which is called the television advanced a giant step. Korn’s “tube is excited by a high-frequency current supplied from a Tesla transformer and may be flashed up many thousand times per second,” thereby attaining the moving television image.8
Tesla dates Korn’s first experiments to 1903. A May 1899 article states that Tesla was working on a “visual telegraphy” system with the light-sensitive element selenium, thus predating Korn’s work by four years. It is probable that Tesla was replicating the experiments of Küster and Williams on precursors to the video camera, although Korn, not Tesla, perfected it.9
In essence, the modern television works in a way analogous to Bain’s first 1842 construction. An electronic tube, similar to Tesla’s brush vacuum tube, is moved across an entire TV screen in an instant. During its pass over the area where the image is formed, it releases synchronized impulses for each pixel. The position of the beam and its precise sequence of firing are directed by impulses stemming from the broadcast station. Each pass over the entire screen creates a separate image that when played in sequence portrays natural moving pictures.
Tesla followed the advances in the field of telephotography as they occurred and experimented himself. His first task was to figure out the optimal way to transmit the energy.
Having tested the Hertz spark-gap apparatus, Tesla found that this device, which Marconi was utilizing, was subject to static interference and involved arbitrary pulsed (damped) frequencies that were weak. They transmitted themselves transversely through the air and did not take into account longitudinal properties which were augmented when making use of extremely high potentials and a ground connection. Working out calculations that took into account the speed of light and the size of the earth, Tesla designed carefully constructed continuous (undamped) electromagnetic waves that were in harmony with those of the planet.
By 1897, Tesla amassed all of the essential patents for generating, modulating, storing, transmitting, and receiving wireless impulses. In a letter to his lawyer, Parker W. Page, Tesla wrote, “I forward herewith M. Marconi’s patent which was just allowed…I notice that the signals have been described as being due to Hertzian waves, which is not the case. In other words, the patent describes something entirely different than what actually takes place…How far does this affect the validity of the patent?”10 Clearly, Tesla already suspected that Marconi was utilizing his equipment.
In Tesla’s first patent specifically for wireless transmission, no. 649,621, filed on September 2, 1897, he discusses the need for a “terminal…preferably of large surface…maintained by such means as a balloon at an elevation suitable for the purposes of transmission…[and another] terminal of the secondary…connected to [the] earth…At the receiving station a transformer of similar construction is employed.” The specification goes on to describe how the wavelengths can be constructed and modified so as to tune the circuits and take into account the natural properties of electromagnetic energy.
Having taken into account the size and capacity of the earth, Tesla had calculated that with a coil fifty miles in length oscillating at 925 times per second, a resonant relationship to the frequency of light was realized. Since he had worked with exhausted tubes, Tesla knew that electricity traveled more easily through them than through air. Thus, he reasoned, if his transmission towers were placed on high elevations above obstructions and further raised by the use of balloons, the upper atmosphere (or ionosphere) itself would serve as a means of transmission. Large power stations located near waterfalls would supply the energy necessary for the wireless transmission to this upper stratum.11
In a separate way, the earth itself would also serve as a medium. The following passage from the same 1897 patent application criticized Marconi’s use of the more primitive Hertzian apparatus: “It is to be noted that the phenomenon here involved in the transmission of electrical energy is one of true conduction and is not to be confounded with the phenomena of electrical radiation which have heretofore been observed and which from the very nature and mode of propagation would render practically impossible the transmission of any appreciable amount of energy to such distance as are of practical importance.”12
Marconi, who was working with Lloyds of London in ship-to-shore experiments, was using a more trial and error method. In July 1896, in experiments with Preece, the Italian had successfully transmitted messages through walls and over distances of seven or eight miles. In December he applied for a patent, which Preece felt was “very strong,”13 although he knew the youngster had been anticipated by Lodge and Tesla. The patent was not original, and it did not put forth any new principles; nevertheless, Marconi was definitely succeeding in the real world, while Tesla advanced in his laboratory in refinements of apparatus and in the theoretical realm. The differences in sophistication of knowledge on the subject are aptly described by one of Marconi’s associates, Mr. Vyvyan. “We knew nothing then about the effect of the length of a wave transmitted governing the distance over which communication could be affected,” the colleague stated. “We did not even have the means or instruments for measuring wave-length, in fact we did not know accurately what wave-length we were using.”14
Preece’s initial work in his study of earth currents and induction effects generating from normal telegraphic lines in the 1880s and 1890s led him to realize the strength of Tesla’s system. Marconi, at that stage, had no understanding of the role of the earth in conveying electrical energy. He was utilizing the principle of “radiation” through the air according to Hertz’s apparatus. Without understanding why, he did make use of an aerial and ground connection, but this setup had already been published widely in 1893 by Tesla. Other principles were taken from Oliver Lodge, who was in a patent dispute with Guglielmo Marconi. William Preece was well aware that they had been anticipated, but he could also see Marconi advance markedly, while his precursors basically stood still.
After Marconi rejected Preece’s suggestion that they request the use of Tesla’s apparatus, the British nobleman was placed in a conflictual situation. In August 1897 he mailed off a “terse” dispatch. “I regret to say that I must stop all experiments and all action until I learn the conditions that are to determine the relations between your company and the [British] Government Departments who have encouraged and helped you so much.”15 But the die was cast, and Preece became helpless to stop what he knew was a complex form of piracy. He became ill and retreated to Egypt, where he stayed a year.
Marconi was also being aided by H. M. Hozier, director of Lloyds, who, according to one account, “succeeded in sending reasonably clear messages…[through Hozier’s apparatus]…in one place, at least where Marconi himself had failed.”16 Lloyds also contacted Tesla “to rig up a wireless set, ship-shore in 1896 to report the international yacht race, [but] Tesla refused the offer, claiming that any public demonstration of his system on less than a world-wide basis would be confused with the amateurish effort being made by other experimenters.”17
Instead, Tesla performed a long-dista
nce clandestine experiment which he told no one about, not even his workers. Sometime in 1896 or early 1897, the inventor turned on his generator to “produce continuous trains of oscillations” and took a cab to the Hudson River. There he caught a boat and ferried up to West Point with a battery-operated machine “suitable for transportation.” “I did this two or three times,” he told the courts in 1915. “[But] there were no signals actually given. I simply got the note, but that was for me just the same.” In other words, having brought a receiving instrument with him, the inventor simply tuned it to the point where it began to respond to the oscillations emanating from his laboratory back at East Houston Street. “That is, I think, a distance of about thirty miles,” Tesla said.18
Tesla also considered harnessing wind power, the tides, solar and geothermal energy, and also energy released during the process of electrolysis. If water was separated into oxygen and hydrogen, these explosive substances could theoretically be used to generate the heat to create steam. Working along varying lines of research, Tesla also patented ozone-production machines and devised a scheme whereby nitrogen from the air would be electrically separated out and blended with conveyor belts of soil to create a fertilizer machine.
“All the agriculturist needs,” Tesla suggested, “is…[to] shovel…a quantity of loose earth, treated by a secret chemical preparation in liquid form…into the cylinder. An electric current is passed through the confined atmosphere, the oxygen and hydrogen are…expelled, and the nitrogen which remains is thus absorbed into the loose earth. There is thus produced as strong fertiliser for a nominal price [right] at [the farmer’s] home.”19
On April 6, 1897, Tesla spoke again to the public at the New York Academy of Sciences. Over four thousand people attended.20 With large photographs of dozens of radio tubes Tesla had designed gracing the walls, Tesla set out to explain his advances in Roentgen rays. Certainly the audience was interested in seeing a remarkable device that revealed the human skeleton of a living person, but unquestionably most of them came to behold the sorcerer hurl his thunderbolts.21
Tesla’s world telegraphy system had finally come into clear focus. His plan was to disturb the electrical capacity of the earth with gigantic Tesla oscillators and thereby use these earth currents themselves as carrier waves for his transmitter. In 1897 he explained precisely how his world telegraphy system would operate:
Suppose the whole earth to be like a hollow rubber ball filled with water, and at one place I have a tube attached…with a plunger…If I press upon the plunger the water in the tube will be driven into the rubber ball, and as the water is practically incompressible, every part of the surface of the ball will be expanded. If I withdraw the plunger, the water follows it and every part of the ball will contract. Now, if I pierce the surface of the ball several times and set tubes and plungers at each place, the plungers in these will vibrate up and down in answer to every movement which I may produce in the plunger of the first tube.
There is a peculiar addition to this paragraph: “If I were to produce an explosion in the centre of the body of water in the ball, this would set up a series of vibrations in the whole body. If I could then set the plunger in one of the tubes to vibrating in consonance with the vibrations of the water, in a little while and with the use of a very little energy, I could burst the whole thing asunder.”
The water corresponds to “terrestrial currents” (which are today known as telluric currents), and the plungers refer to his transmitters and receivers. “The inventor thinks it possible that his machine when perfected may be set up, one in each great centre of civilization, to flash the news of the day’s or hour’s history immediately to all other cities of the world; and stepping for a sentence out of the realms of the workaday world, he offers a prophecy that any communication we may have with other stars will certainly be by such a method.”22
This article, which appeared in Scribners, also discussed Marconi’s successful wireless transmission of eight miles in Europe. We see in these passages stemming from 1896 and 1897, that Tesla had already conceived of a total plan for his world telegraphy system and that it utilized a variety of wireless modes, one being through the upper air strata, another by means of mechanical resonance, which he called telegeodynamics, and a third, and his most important, by riding terrestrial currents. His next plan was to measure precisely the frequency of the planet and construct transmitters in harmonic relations to it. Nodal points could then be mapped out from, say, a wireless transmitter placed at Niagara Falls to precise positions for receiving towers on different continents.
For all intents and purposes, no one, except for Marconi, had demonstrated that wireless messages could be transmitted more than a few hundred feet. And success only involved the modest goal of sending Morse coded messages. Marconi’s next plan, which would capture the world’s attention, was to radiate the impulses across the English Channel. Certainly Tesla had demonstrated all of the principles found in the modern radio years earlier, but his public demonstrations were held within lecture halls. He had established that he could illuminate lamps from a transmitter placed on the roof of his laboratory on Houston Street to his hotel twenty-six blocks away, but these experiments were held in secret and were never publicized.23 The 1895 fire also thwarted his efforts to display long-distance effects.
And when Lloyds of London contacted him, to the dismay of his secretary, George Scherff, Tesla rejected the offer to demonstrate his system’s capabilities.
Tesla, however, was not content with merely setting up a world broadcasting system that, from a conceptual perspective, is superior to our prevailing technology in that it would transmit power as well as information; he also suggested that he could contact the stars, create rain in the deserts, or cause wide-scale havoc. Tesla became the quintessential mad scientist. Through his inventions, the world could be dominated according to whim.
The contradictions within the inventor began to pull him in opposite directions. In letters to the Johnsons he calls himself Tesla Great Inventor and implies that, like Paderewski and other luminaries, he was not a mere mortal, but during his Niagara Falls speech he denigrated himself. Tesla was somewhat wealthy during this period, but the requirements of his operations were beyond his means. And yet Tesla shunned billing engineers when they sought his aid and voided a royalty contract with Westinghouse, though it was now worth a fortune.
In June 1897 it was reported that Westinghouse had paid $216,000 for his patents.24 As Tesla and his partners, Brown and Peck, were receiving yearly checks of $15,000, with an initial down payment of probably $70,000,25 this works out to about a quarter of a million dollars for a ten-year period. In a letter to Astor, Tesla places the figure at $500,000,26 but in either case, it was still millions of dollars less than its actual value.
By this time, Westinghouse and GE had formalized their “entente cordiale.” This meant that a second gigantic corporation with numerous subsiaries would be benefiting from Tesla’s invention but the inventor would not receive a dime for it. The electric subway trains would also be implementing the Tesla motors and system, and again the inventor would get no compensation.
Tesla’s new plans would require enormous expenditures. Westinghouse was making it clear that his company would not be a source of funds beyond their former signed agreement (although it is possible that Tesla did receive additional revenues for other inventions, such as for his oscillators). At the end of the year, the inventor wrote his friend Earnest Heinreich, an engineer at the Westinghouse Corporation who also was a novelist. “My dear Heinreich,” Tesla wrote, “It is true that I have not been quite well of late, but can assure you that I am physically and mentally all right at present. I have however, still a little ailment which may be best designated as financial anemia, from which you are yourself suffering, if I am not mistaken. I wish you would remember me to all the boys at about Xmas time for it is just possible that some of them might feel disposed to send me a token.”27
There were other pressure
s as well. Tesla was having difficulties with his financial backer Edward Dean Adams, who was opposing his efforts to promote his wireless enterprise; there was this continuing competition with Marconi; and there were the painful echoes of his Serbian past, from Kosovo and his lost youth. His parents and brother were dead, and he was away from his family not just in distance but also in spirit. In yet another of so many letters sent, sisters Marica and Angelina pleaded for a response. Tesla had sent funds on many occasions and a copy of his Martin text, but they wanted more. “Remember what your name is and where you come from,” Marica wrote, ending her letter with the customary “I am kissing you in spirit.”28 Part of him ached from the pain, and just as he was coasting high and ahead of the pack on the crest of the wave.
Maybe it was the influence of the Boer War or the unrest brewing in Cuba, but Tesla’s destructive streak began to emerge. His previous inventions were already reshaping human events; his newest creation could interlink every remote hamlet or tear the world apart. He decided to experiment.
With George Scherff present, Tesla placed one of his mechanical oscillators on the center support beam in the basement of the Houston Street building where his laboratory was located and adjusted the frequency to the point where the beam began to hum. “While he was attending to something else for a few moments, it attained such a crescendo of rhythm that it started to shake the building, then it began shaking the earth nearabout [and other buildings with support beams in resonant
