Tesla’s (Lightning-Struck) Tower

 

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 Wardenclyffe Tower was located in Shoreham, Long Island, New York. The 94 ft (29 m) by 94 ft (29 m) brick building was designed by architect Stanford White. The station, including the tower structure was not completed...
“Ere many generations pass, our machinery will be driven by a power obtainable at any point of the universe.”

– Nikola Tesla, February 1892

Wardenclyffe Tower (1901–1917) also known as the Tesla Tower, was an early wireless telecommunications aerial tower designed by Nikola Tesla and intended for commercial trans-Atlantic wireless telephony, broadcasting, and to demonstrate the transmission of power without interconnecting wires.^[1][2] The core facility was never fully operational and was not completed...^[3]

The tower was named after James S. Warden, a western lawyer and banker who had purchased land in Shoreham, Long Island, about sixty miles from Manhattan. Here he built a resort community known as Wardenclyffe-On-Sound. Warden believed that with the implementation of Tesla's "world system", a " Radio City" would arise in the area, and he offered Tesla 200 acres (81 hectares) of land close to a railway line on which to build his wireless telecommunications tower and laboratory facility.

History

Construction

 

 

Tesla's Wardenclyffe plant on Long Island in partial stage of completion. Work on the 55-foot diameter cupola had not yet begun. Note what appears to be a coal car parked next to the building. From this facility, Tesla hoped to demonstrate wireless transmission of electrical energy to France. Circa 1902.

Nikola Tesla began planning the Wardenclyffe Tower facility ca. 1898, and in 1901, construction began on the land near Long Island Sound. Architect Stanford White designed the Wardenclyffe facility main building. The tower was designed by W.D. Crow, an associate of White. Funding for Tesla's project was provided by influential industrialists and other venture capitalists. The project was initially backed by the wealthy J. P. Morgan (he had a substantial investment in the facility, initially investing $150,000).

In June 1902, Tesla moved his laboratory operations from his Houston Street laboratory to Wardenclyffe. However, in 1903, when the tower structure was near completion, it was still not yet functional due to last-minute design changes. Tesla intended for the tower to demonstrate how the ionosphere could be used to provide free electricity to everyone without the need for power lines. Morgan, who could not foresee any financial gain from providing free electricity to everyone, balked.

Construction costs eventually exceeded the money provided by Morgan, and additional financiers were reluctant to come forward.^[4] By July 1904, Morgan (and the other investors) finally decided they would not provide any additional financing. Morgan also encouraged other investors to avoid the project. In May 1905, Tesla's patents on alternating current motors and other methods of power transmission expired, halting royalty payments and causing a severe reduction of funding to the Wardenclyffe Tower… By this time, Tesla had also designed the Tesla turbine at Wardenclyffe and produced Tesla coils for sale to various businesses.

By 1905, since Tesla could not find any more backers, most of the site's activity had to be shut down. Employees were laid off in 1906, but parts of the building remained in use until 1907. In 1908, the property was foreclosed for the first time. Tesla procured a new mortgage from the proprietor of the Waldorf-Astoria Hotel, George C. Boldt. The facility was partially abandoned around 1911, the tower structure eventually becoming deteriorated. Between 1912 and 1915, Tesla's finances unraveled, and when the funders wanted to know how they were going to recapture their investments, Tesla was unable to give satisfactory answers. Newspaper headlines of the time labeled it "Tesla's million-dollar folly." The facility's main building was breached and vandalized around this time…

In 1915, legal ownership of the Wardenclyffe property was transferred to George Boldt for a $20,000 debt. In September 1917 during World War I, the tower was blown up with dynamite on orders of the United States Government which feared German spies were using it and that it could be used as a landmark for German submarines.^[5] Tesla was not in New York during the tower's destruction…

 

Facility grounds

Wardenclyffe is located near the Shoreham Post Office and Shoreham Fire House on Route 25A in Shoreham, Long Island, New York. Wardenclyffe was divided into two main sections. The tower, which was located in the back, and the main building compose the entire facility grounds.

The tower was 187 feet (57 meters) tall and 68 feet (20.7 m) in diameter. It had a supporting structure that was built of wood. It had a 55-ton steel (some report it was a better conducting material, such as copper) hemispherical structure at the top (referred to as a cupola). The tower was designed by one of Stanford White's associates. The design of this structure was such as to allow each piece to be taken out if needed and replaced as necessary. Beneath the tower, a shaft sank 120 feet (36.6 m) into the ground. Sixteen iron pipes were placed one length after another 300 additional feet (94.4 m) in order for the machine, in Tesla's words, "to have a grip on the earth so the whole of this globe can quiver."^[8] At this depth, telluric currents of the Earth could be transceived.

The main building occupied the rest of the facility grounds. It included a laboratory area, instrument room, boiler room, generator room and machine shop. Inside the main building, there were electromechanical devices, electrical generators, electrical transformers, glass blowing equipment, X-ray devices, Tesla coils, a remote controlled boat, cases with bulbs and tubes, wires, cables, a library, and an office. It was constructed in the style of the Italian Renaissance.

Theories of operation

The transmission of radiant energy

 

In 1891 and 1892, Tesla had used an oscillatory transformer that bears his name in demonstration lectures delivered before meetings of the American Institute of Electrical Engineers (AIEE) in New York City"^[9] and the Institute of Electrical Engineers (IEE) in London.^[10] Of two striking results that Tesla demonstrated, one was that the wireless transmission of electrical energy was possible. A later presentation, titled "On Light and Other High Frequency Phenomena" (Philadelphia/St. Louis; Franklin Institute in 1893),^[11] was a key event in the invention of radio and could be said to have begun the development of Wardenclyffe.

One-wire transmission

 

In the early presentations, the first experiment to be demonstrated was the operation of light and motive devices connected by a single wire to only one terminal of a high frequency induction coil, presented during the 1891 New York City lecture at Columbia University. While a single terminal incandescent lamp connected to one of an induction coil’s secondary terminals does not form a closed circuit “in the ordinary acceptance of the term”, the circuit is closed in the sense that a return path is established back to the secondary by what Tesla called “electrostatic induction” (or 'displacement currents'). This is due to the fact that the lamp’s filament or refractory button has capacitance relative to the coil’s free terminal and environment and the secondary’s free terminal also has capacitance relative to the lamp and environment. At high frequencies, the displacement current required to charge these capacitances becomes sufficient to light the lamp.

Wireless transmission

A "world system" for "the transmission of electrical energy without wires" that depends upon electrical conductivity was proposed by Tesla.^[15] Through longitudinal waves, an operator uses the Tesla effect in the wireless transfer of energy to a receiving device.

The second result demonstrated how energy could be made to go through space without any connecting wires. This was the first step towards a practical wireless system. The wireless energy transmission effect involved the creation of an electric field between two metal plates, each being connected to one terminal of an induction coil’s secondary winding. Once again, a light-producing device (in this case a gas discharge tube) was used as a means of detecting the presence of the transmitted energy. "The most striking result obtained" involved the lighting of two partially evacuated tubes in an alternating electrostatic field while held in the hand of the experimenter. In Tesla's words,

“... I suspend a sheet of metal a distance from the ceiling on insulating cords and connect it to one terminal of the induction coil, the other terminal being preferably connected to the ground. Or else I suspend two sheets as illustrated in Fig. 29 / 125, each sheet being connected with one of the terminals of the coil, and their size being carefully determined. An exhausted tube may then be carried in the hand anywhere between the sheets or placed anywhere, even a certain distance beyond them; it remains always luminous.^[16]”

Here Tesla describes two different types of wireless transmitters, both employing a high-tension induction coil. The first, referred to here as the type-one transmitter, had a sheet of metal suspended from the ceiling and connected to one of the induction coil’s terminals. The other terminal was connected to ground. The second, referred to here as the type-two transmitter, had two sheets of metal suspended from the ceiling, each being connected with one of the coil’s terminals.

Theory of wireless transmission

 

While working to develop an explanation for the two observed effects mentioned above, Tesla recognized that electrical energy could be projected outward into space and detected by a receiving instrument in the general vicinity of the source without the need for any interconnecting wires. He went on to develop two theories related to these observations, which are:

1.              By using two type-one sources positioned at distant points on the Earth’s surface, it is possible to induce a flow of electrical current between them.

2.              By incorporating a portion of the Earth as part of a powerful type-two oscillator the disturbance can be impressed upon the Earth and detected “at great distance, or even all over the surface of the globe.”^[16]

Tesla also made the assumption that the Earth is a charged body floating in space.

A point of great importance would be first to know what is the capacity of the Earth - and what charge does it contain if electrified? Though we have no positive evidence of a charged body existing in space without other oppositely electrified bodies being near, there is a fair probability that the Earth is such a body, for by whatever process it was separated from other bodies—and this is the accepted view of its origin—it must have retained a charge, as occurs in all processes of mechanical separation.^[16]

Tesla was familiar with demonstrations that involved the charging of Leyden jar capacitors and isolated metal spheres with electrostatic influence machines. By bringing these elements into close proximity with each other, and also by making direct contact followed by their separation the charge can be manipulated. He surely had this in mind in the creation of his mental image, not being able to know that the model of Earth’s origin was inaccurate. The presently accepted model of planetary origin is one of accretion and collision.

If it be a charged body insulated in space its capacity should be extremely small, less than one-thousandth of a farad.^[16]

We now know that the Earth is, in fact, a charged body, made so by processes—at least in part—related to the interaction between the continuous stream of charged particles called the solar wind that flows outward from the center of our solar system and Earth’s magnetosphere. And we also know that Tesla's capacitance estimate was correct: Earth's self-capacitance is about 710 microfarads.^[17]

But the upper strata of the air are conducting, and so, perhaps, is the medium in free space beyond the atmosphere, and these may contain an opposite charge. Then the capacity might be incomparably greater.^[16]

[Theories concerning the fundamentally electrical nature of the universe discuss the alternative proposal that all the planets are negatively charged capacitors within the Sun’s charged electrical field; See Electric Universe at the New Illuminati site – Ed]

We now also know that one of the upper strata of Earth's atmosphere, the ionosphere, is a conductive medium.

In any case it is of the greatest importance to get an idea of what quantity of electricity the Earth contains.^[16]

An additional condition of which we are now aware is that the Earth possesses a naturally existing negative charge with respect to the conducting region of the atmosphere beginning at an elevation of about 50 km. The potential difference between the Earth and this region is on the order of 400,000 volts. Near the Earth's surface there is a ubiquitous downward directed E-field of about 100 V/m. Tesla referred to this charge as the “electric niveau” or electric level.^[18]

There is hope that we may acquire this necessary knowledge to reproduce this effect by means of an understanding of electrical resonance. If ever we can ascertain at what period the Earth's charge, when disturbed, oscillates with respect to an oppositely electrified system or known circuit, we shall know a fact possibly of the greatest importance to the welfare of the human race. I propose to seek for the period by means of an electrical oscillator, or a source of alternating electric currents...^[19]

Some maintain the 200 kW wireless facility would have functioned by the propagation of electromagnetic radiation, or radio waves, then called Hertzian radiation [An incorrect assumption; see below – Ed].

By Tesla's own account, his earth resonance system works by the creation of powerful disturbances in Earth's natural electric charge. The Wardenclyffe facility had a dual purpose. In addition to point-to-point telecommunications and broadcasting it was also intended to demonstrate the transmission of electrical power on a reduced scale. He stated,

“It is intended to give practical demonstrations of these principles with the plant illustrated. As soon as completed, it will be possible for a business man in New York to dictate instructions, and have them instantly appear in type at his office in London or elsewhere. He will be able to call up, from his desk, and talk to any telephone subscriber on the globe, without any change whatever in the existing equipment. An inexpensive instrument, not bigger than a watch, will enable its bearer to hear anywhere, on sea or land, music or song, the speech of a political leader, the address of an eminent man of science, or the sermon of an eloquent clergyman, delivered in some other place, however distant. In the same manner any picture, character, drawing, or print can be transferred from one to another place. Millions of such instruments can be operated from but one plant of this kind. More important than all of this, however, will be the transmission of power, without wires, which will be shown on a scale large enough to carry conviction.^”[20]

Wardenclyffe was the first of many installations to be constructed near major population centers around the world. If Tesla's plans had moved forward without interruption the Long Island prototype would have been followed by a second plant built somewhere along the southwest coast of England, perhaps in Cornwall. Each of these towers would have been a large magnifying transmitter of a design loosely based upon the apparatus which Tesla assembled at the Colorado Springs Experimental Station in 1899.

"... The plant in Colorado was merely designed in the same sense as a naval constructor designs first a small model to ascertain all the quantities before he embarks on the construction of a big vessel. I had already planned most of the details of the commercial plant, subsequently put up at Long Island, except that at that time the location was not settled upon. The Colorado plant I have used in determining the construction of the various parts, and the experiments which were carried on there were for the practical purpose of enabling me to design the transmitters and receivers which I was to employ in the large commercial plant subsequently erected..."^[21]

Using a global array of these magnifying transmitters, it was Tesla's plan to establish what he called the "World System," providing multi-channel global broadcasting, an array of secure wireless telecommunications services, and a long range aid to navigation, including means for the precise synchronization of clocks. In a more highly developed state he envisioned the World System would expand to include the wireless industrial transmission of electric power.^[22]

The installation was also used by Tesla as a laboratory for designing a power distribution system that would allow electricity to be transmitted over great distances without wires. This cannot be accomplished with what Tesla called "Hertz waves," which explains why Wardenclyffe was designed in a different manner than modern radio transmitters. Instead of distributing electricity through copper wire, remote users would be able to "receive" power through a buried ground connection, along with a spherical antenna terminal mounted just above their roof. [Modern versions of the ‘shem’ stones atop the buildings, pediments and columns in the interconnected cities and settlements of the ancients – Ed]. At the time the power grid was quite limited in terms of who it reached and the Wardenclyffe prototype represented a way in which to significantly reduce the cost of "electrifying" the countryside. Tesla called his wireless technique the "disturbed charge of ground and air method".^[23]

The prototype facility was also meant to serve as a reduced-scale model for a national (and later global) system of towers to transmit electrical energy to users in the form of earth currents and magnetohydrodynamic waves. There is evidence that Wardenclyffe would have used extremely low frequency signals combined with higher frequency signals. In practice, the transmitter electrically influences both the Earth and the space above it. He made a point of describing the process as being essentially the same as transmitting electricity by conduction through a wire. Tesla stated that electrical energy can be efficiently transmitted back and forth between World System transmitter / receiver facilities via electrical conduction through the ground. To accommodate this plan each facility includes one or two elevated terminal connections and one or two ground terminal connections.

Tesla clearly specified the Earth as being one of the conducting media involved in ground and air system technology. The other specified medium is the atmosphere above 5 miles (8.0 km) elevation. While not an ohmic conductor, in this region of the troposphere and upwards, the density or pressure is sufficiently reduced to so that, according to Tesla’s theory, the atmosphere’s insulating properties can be easily impaired, allowing an electric current to flow. His theory further states that the conducting region is developed through the process of atmospheric ionization, in which the effected portions thereof are changed to plasma. The presence of the magnetic fields developed by each plant’s helical resonator suggests that an embedded magnetic field and flux linkage is also involved. Flux linkage with Earth’s natural magnetic field is also a possibility, especially in the case of an earth resonance transmission system.

The atmosphere below 5 miles (8.0 km) is also viewed as a propagating medium for a portion of the above-ground circuit, and, being an insulating medium, electrostatic induction would be involved rather than true electrical conduction. Tesla felt that with a sufficiently high electrical potential on the elevated terminal the practical limitation imposed upon its height could be overcome. He anticipated that a highly energetic transmitter, as was intended at Wardenclyffe, would charge the elevated terminal to the point where the atmosphere around and above the facility would break down and become ionized, leading to a flow of true conduction currents between the two terminals by a path up to and through the troposphere, and back down to the other facility. 

The ionization of the atmosphere directly above the elevated terminals would be facilitated by the use of an ionizing beam of ultraviolet radiation to form what might be called a high-voltage plasma transmission line (see maxwellian waves and waves in plasmas). Powered by an industrial alternator, a generator facility's tower was intended to inject large amounts of energy into a natural Earth circuit, using the Earth-Ionosphere network as the transmission circuit.

In various writings, Tesla explained that the Earth itself behaves as a resonant LC circuit when it is electrically excited at certain frequencies. At Wardenclyffe he operated at frequencies ranging from 1,000 Hz to 100 kHz. Tesla found the frequency range up to 30 – 35 kHz “to be most economical.” Excitation of earth resonance at or near a fundamental frequency (about 7.5 to 7.9 Hz), might suggest the utilization of what is now known as a Schumann resonance mode.

The entire Earth can be electrically resonated with a single type-two source, so an earth-resonance based system would require, at a minimum, that only one generating facility be constructed. Alternatively, two distantly spaced type-one generating facilities could be constructed. Such a system would not be so dependent upon the excitation of an earth-resonance mode. In either case a surface or ground wave, similar to the Zenneck wave would be utilized. Artificially induced earth currents would be utilized. According to Tesla, the planet's large cross-sectional area provides a low resistance path for the flow of earth currents. The greatest losses are apt to occur at the points where the transmitting / receiving plants and dedicated receiving stations are connected with the ground. This is why Tesla stated,

“You see the underground work is one of the most expensive parts of the tower. In this system that I have invented it is necessary for the machine to get a grip of the Earth, otherwise it cannot shake the Earth. It has to have a grip on the Earth so that the whole of this globe can quiver, and to do that it is necessary to carry out a very expensive construction.”^[24]

To close the circuit a second path would be established between the two type-one plants' elevated high-voltage terminals through the rarefied atmospheric strata above five miles (8 km). The connection would be made by some combination of electrostatic induction and electrical conduction through plasma. While a number of his wireless patents, including "Apparatus for transmitting electrical energy", U.S. Patent No. 1,119,732, December 1, 1914, describe a system which uses the plasma-conduction scheme, his "Art of transmitting electrical energy through the natural mediums", U.S. Patent No. 787,412, April 18, 1905 and some of his Wardenclyffe design notes from 1901 show that he also had a plan to electrostatically induce oscillations in the potential associated with Earth's self-capacitance by rapidly transferring large amounts of electrical charge between the large topload capacitance and the self-capacitance of the whole Earth. The type-two transmitter is especially designed for this purpose. Tesla wrote,

“The specific plan of producing the stationary waves, here-in described, might be departed from. For example, the circuit which impresses the powerful oscillations upon the earth might be connected to the latter at two points.”^[25]

Tesla firmly believed that a fully developed system with generating stations based upon the Wardenclyffe prototype would permit wireless transmission and reception across large distances with negligible losses.^{[26][27][28][29]}

Electrical reception

 

Variants were suggested by Tesla for receiving power from electromagnetic radiation, or alternating electric near fields, of practicable frequency, and for exploiting the vertical voltage gradient in the Earth's atmosphere. Tesla performed experiments of the former type with some success, particularly in the area of receiving what was probably the near electric field of a large transmitting Tesla coil some distance away. He felt that several of his experiments were operating on a basis of Hertzian waves, electromagnetic waves propagated in space without artificial guide.^[30]

Tesla stated that one of the seven features of this world wireless system was the construction of a "resonant receiver".^[31] The secondary of a Tesla Coil and its capacitor can be used in receive mode.^{[32][33][34][35][36][37]} Tesla himself demonstrated wireless transmission of electric power from his transmitter to his receiver. These concepts and methods are part of his wireless transmission of electric power distribution system (US1119732 — Apparatus for Transmitting Electrical Energy — 1902 January 18). Tesla made a proposal that there needed to be "thirty" such antennas worldwide.^[38] The receiving circuit of these towers are each connected with a condenser and a device adapted to open and close the receiving circuit at predetermined intervals of time.^[39] 

The Tesla Coil receiver has means for commutating, directing, or selecting the current impulses in the charging circuit so as to render them suitable for charging the storage device, a device for closing the receiving-circuit, and means for causing the receiver to be operated by the energy accumulated.^[40]

Tesla coil in one experiment of many conducted in Colorado Springs. This is a grounded tuned coil in resonance with a distant transmitter; Light is glowing near the bottom.

A Tesla Antenna^{[41][42][43][44]} as a receiver acts as a step-down transformer with high current output.^[45] The parameters of a Tesla Coil transmitter are identically applicable to it being a receiver (e.g., an antenna circuit), due to reciprocity. Impedance, though, is not applied in an obvious way; for electrical impedance, the impedance at the load (e.g., where the power is consumed) is most critical and, for a Tesla Coil receiver, this is at the point of utilization (such as at an induction motor) rather than at the receiving node. Complex impedance of an antenna is related to the electrical length of the antenna at the wavelength in use. Commonly, impedance is adjusted at the load with a tuner or a matching network composed of inductors and capacitors.

A Tesla Coil can receive electromagnetic impulses^[46] from atmospheric electricity^[47][48][49] and radiant energy,^[50][51] besides normal wireless transmissions. Radiant energy throws off strongly electrified minute particles with great velocity, and other rays falling on the insulated-conductor connected to a condenser (i.e., a capacitor) can cause the condenser to indefinitely charge electrically.^[52] The helical resonator can be "shock excited" due to radiant energy disturbances, not only at the fundamental wave at one-quarter wave-length but also is excited at its harmonics. Hertzian methods can be used to excite the Tesla Antenna, though with limitations which result in great disadvantages for utilization.^[53]

The methods of ground conduction and the various induction methods can also be used to excite the Tesla Antenna, but are again at disadvantages for utilization.^[54] The charging-circuit can be adapted to be energized by the action of various other disturbances and effects at a distance. Arbitrary and intermittent oscillations that are propagated via conduction to the receiving resonator will charge the receiver's capacitor and utilize the potential energy to greater effect.^[55] Various radiations can be used to charge and discharge conductors, with the radiations considered electromagnetic vibrations of various wavelengths and ionizing potential.^[56]

The Tesla Antenna utilizes the effects or disturbances to charge a storage device with energy from an external source (natural or man-made) and controls the charging of said device by the actions of the effects or disturbances (during succeeding intervals of time determined by means of such effects and disturbances corresponding in succession and duration of the effects and disturbances).^[57] The stored energy can also be used to operate the receiving device. The accumulated energy can, for example, operate a transformer by discharging through a primary circuit at predetermined times which, from the secondary currents, operate the receiving device.^[58]

While Tesla Coils can be used for these purposes, much of the public and media attention is toward the transmitting applications of the Tesla Coil, since the plasma discharges are fascinating to most people. Regardless of this fact, Tesla did suggest that this variation of the Tesla coil could utilize the phantom loop effect to form a circuit to induct energy from the Earth's magnetic field and other radiant energy sources (including, but not limited to, electrostatics^[59]). With regard to Tesla's statements on the harnessing of natural phenomena to obtain electric power, he stated:

“Ere many generations pass, our machinery will be driven by a power obtainable at any point of the universe. — "Experiments with Alternate Currents of High Potential and High Frequency" (February 1892)

Tesla stated that the output power from these devices, attained from Hertzian methods of charging, was low,^[60] but alternative charging means are available. Tesla receivers operated correctly act as a step-down transformer with high current output.^[61] There are, to date, no commercial power generation entities or businesses that have utilized this technology to full effect. The power levels achieved by Tesla Coil receivers have, thus far, been a fraction of the output power of the transmitters.^{[citation needed]}

Ignoring earth currents and other natural electromagnetic phenomena, the Tesla antenna can only receive atmospheric electricity's total power of all the sky-to-ground lightning everywhere on Earth from moment to moment  - which has been stated at 700 megawatts.^[62] By comparison, a typical fossil fuel power plant (such as oil or gas) feeding the utility grid may have two gas turbines and a single steam turbine utilizing the heat from the discharged flue gas of the gas turbines, with each of the three turbines rated at 100 megawatts. On the load side, 700 MW is seen to correspond to two million parsimonious households averaging 350 watts of power use, contrasted with a world population of over six billion people [Other much higher estimates of total power available within the Earth-ionosphere cavity have been made; see Free Energy endnotes – Ed]

As regards methods, atmospheric electricity includes static electricity and other phenomena. Modern HVDC technology inverts DC at such voltages to AC well enough to be very popular for use in the power grid; a Tesla coil variant is not the only way to do this, nor necessarily the best way, either for atmospheric electricity or telluric power.^[63] Earth's surface has a negative charge and the atmosphere has a positive charge…

Contents

• 1 History
  • 1.1 Construction
  • 1.2 Post-Tesla Era
  • 1.3 Commemoration efforts
• 2 Facility grounds
• 3 Theories of operation
  • 3.1 The transmission of radiant energy
  • 3.2 One-wire transmission
  • 3.3 Wireless transmission
  • 3.4 Theory of wireless transmission
  • 3.5 Electrical reception
• 4 Tesla's ray
• 5 Telefunken Station
• 6 Quotes
• 7 Related patents
• 8 See also
• 9 Notes
• 10 Further reading
• 11 External links

Extracted & edited from http://en.wikipedia.org/wiki/Wardenclyffe_tower - 9/11/2008

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