Category: experiments


*Nikola Tesla’s remarkable experiments with wireless lamps and vacuum tubes shown before the Franklin Institute and the National Electric Light Association in 1893*

“These were the most striking results I showed in the transmission of energy… You see how far I have gone into the mastery of electrical vibrations in 1893. I stand here [Fig. 190] in the hall, holding a lamp in my hand, and the energy transmitted lights it. Here again [Fig. 191] I hold a phosphorescent bulb in my hand, and here [Fig. 192] a vacuum tube.

"These experiments, I remember, were made in St. Louis. There was a hall with 6,000 or 7,000 people. When I explained how I had shown a phosphorescent bulb to Lord Kelvin in England, and told them that the bulb was going to spring into light, and the current was turned on and it did burst into light, there was a stampede in the to upper galleries and they all rushed out. They thought it was some part of the devil’s work, and ran out. That was the way my experiments were received.”

–Nikola Tesla

(Tesla explaining his wireless art in a pre-hearing interview with his legal counsel in 1916 to protect his radio patents from the Guglielmo Marconi and the Marconi Company.)

“Nikola Tesla On His Works With Alternating Currents and Their Application to Wireless Telegraphy, and Transmission of Power.” Twenty First Century Books, Breckenridge, Colorado, 2002.


Nikola Tesla Refuted Our Present Understanding of Radio Waves

Believed in a gaseous ether proven by experiments

“Heinrich Hertz undertook his experiments from 1887 to 1889. His object was to demonstrate a theory postulating a medium filling all space, called the ether, which was structureless, of inconceivable tenuity and yet solid and possessed of rigidity incomparably greater than that of the hardest steel. He obtained certain results and the whole world acclaimed them as an experimental verification of that cherished theory. But in reality what he observed tended to prove just its fallacy.

I had maintained for many years before that such a medium as supposed could not exist, and that we must rather accept the view that all space is filled with a gaseous substance. On repeating the Hertz experiments with much improved and very powerful apparatus, I satisfied myself that what he had observed was nothing else but effects of longitudinal waves in a gaseous medium, that is to say, waves, propagated by alternate compression and expansion. He had observed waves in the ether much of the nature of sound waves in the air.

Up to 1896, however, I did not succeed in obtaining a positive experimental proof of the existence of such a medium. But in that year I brought out a new form of vacuum tube capable of being charged to any desired potential, and operated it with effective pressures of about 4,000,000 volts. I produced cathodic and other rays of transcending intensity. The effects, according to my view, were due to minute particles of matter carrying enormous electrical charges, which, for want of a better name, I designated as matter not further decomposable. Subsequently those particles were called electrons.

One of the first striking observations made with my tubes was that a purplish glow for several feet around the end of the tube was formed, and I readily ascertained that it was due to the escape of the charges of the particles as soon as they passed out into the air; for it was only in a nearly perfect vacuum that these charges could be confined to them. The coronal discharge proved that there must be a medium besides air in the space, composed of particles immeasurably smaller than those of air, as otherwise such a discharge would not be possible. On further investigation I found that this gas was so light that a volume equal to that of the earth would weigh only about one-twentieth of a pound.

The velocity of any sound wave depends on a certain ratio between elasticity and density, and for this ether or universal gas the ratio is 800,000,000,000 times greater than for air. This means that the velocity of the sound waves propagated through the ether is about 300,000 times greater than that of the sound waves in air, which travel at approximately 1,085 feet a second. Consequently the speed in ether is 900,000 x 1,085 feet, or 186,000 miles, and that is the speed of light.

As the waves of this kind are all the more penetrative the shorter they are, I have for years urged the wireless experts to use such waves in order to get good results, but it took a long time before they settled upon this practice.

Although the world is still skeptical as to the feasibility of my undertaking, I note that some advanced experts, at least, share my views, and I hope that before long wireless power transmission will be as common as transmission by wires.“

Nikola Tesla

According to Mr. Tesla, the present broadcasting station does not propagate Hertzian waves, as has always been supposed, but acts more like an “ether whistle” – transmitting waves through the ether similar to the waves transmitted by an ordinary whistle through the air. He also expressed his disbelief in the Heaviside layer, and claimed that the reflection of waves back toward the earth was due to the change of medium encountered at the vacuous boundary of the atmosphere.

“Nikola Tesla Tells of New Radio Theories.” New York Herald Tribune, September 22, 1929.


“Over five years have elapsed since that providential lightning storm on the 3rd of July, 1899, of which I told in the article before mentioned, and through which I discovered the terrestrial stationary waves; nearly five years since I performed the great experiment which on that unforgettable day, the dark God of Thunder mercifully showed me in his vast, awe-sounding laboratory. I thought then that it would take a year to establish commercially my wireless girdle around the world. Alas! my first “world telegraphy” plant is not yet completed, its construction has progressed but slowly during the past two years. And this machine I am building is but a plaything, an oscillator of a maximum activity of only ten million horse-power, just enough to throw this planet into feeble tremors, by sign and word—to telegraph and to telephone. When shall I see completed that first power plant, that big oscillator which I am designing! From which a current stronger than that of a welding machine, under a tension of one hundred million volts, is to rush through the earth! Which will deliver energy at the rate of one thousand million horse-power—one hundred Falls of Niagara combined in one, striking the universe with blows—blows that will wake from their slumber the sleepiest electricians, if there be any, on Venus or Mars! .  .  .  It is not a dream, it is a simple feat of scientific electrical engineering, only expensive—blind, faint-hearted, doubting world! .  .  .  Humanity is not yet sufficiently advanced to be willingly led by the discover’s keen searching sense. But who knows? Perhaps it is better in this present world of ours that a revolutionary idea or invention instead of being helped and patted, be hampered and ill-treated in its adolescence—by want of means, by selfish interest, pedantry, stupidity and ignorance; that it be attacked and stifled; that it pass through bitter trials and tribulations, through the heartless strife of commercial existence. So do we get our light. So all that was great in the past was ridiculed, condemned, combated, suppressed—only to emerge all the more powerfully, all the more triumphantly from the struggle.”

–Nikola Tesla

“The Transmission of Electrical Energy Without Wires As a Means for Furthering Peace.“ Electrical World and Engineer, January 7, 1905



Nikola Tesla aka “Mr. π / 2 ( c )”

v = π / 2 ( c )

v = average velocity of Tesla’s electrical current round earth (miles per second)

(you can plug in any metric and get same results)

c = speed of light (miles per second)

v = π / 2 (186,300)

v = 1.57 (186,300)

v = 292,491

While experimenting in Colorado Springs at the end of 1899, Nikola Tesla sent electrical currents around the earth faster than the speed of light. In his patent No. 787,412, filed May 16, 1900, titled the “Art of Transmitting Wireless Electrical Energy Through the Natural Mediums,” Tesla showed that the current of his transmitter passed over and around the earth’s surface with a speed of 292,815 miles per second. In his patent he says:

“The most essential requirement is that irrespective of frequency the wave or wave-train should continue for a certain period of time, which I have estimated to be not less than one-twelfth or probably 0.08484 of a second and which is taken in passing to and returning from the region diametrically opposite the pole over the earth’s surface with a mean velocity of about 471,240 kilometers per second [(292,815 miles per second)].”

Tesla held, however, that our present “wireless” technology (ex. Internet, WiFi, radio, etc.) are not true Hertzian waves, but act more like sound waves. They travel close to the speed of light and are purely radiation while his energy transmission through the earth gives off no radiation. Also, his energy is completely recoverable while other wireless transmissions are not. This is how Tesla theorized that he could send any amount of electrical energy through the earth to power the world’s machinery and technology.

So… Mr. “π / 2 ( c )” was, and still is a mind far ahead of his time!



“Radio Power Will Revolutionize The World.” By Alfred Albelli. Modern Mechanix, July, 1934.

She’s a keeper! 😂😂😂

She’s a keeper! 😂😂😂


Nikola Tesla does not believe in the existence of an “electron” as pictured by pop science — or, he maintains, through practical reasoning and experimentation, that if it can exist at all, it does so only in perfect vacuum.

“To account for its apparently small mass, science conceives the electron as a hollow sphere, a sort of bubble. Now, a bubble can exist in such a medium as a gas or liquid because its internal pressure is not altered by deformation. But if, as supposed, the internal pressure of an electron is due to the repulsion of electric masses, the slightest conceivable deformation must result in the destruction of the bubble!

“Just to mention another improbability, the force tending to tear an electron apart is, in pounds per square inch, represented by the staggering figure of 256,899 followed by twenty-one zeros — and this is 513,798,000,000,000,000,000 times greater that the tension that tungsten wire can withstand! And yet it does not burst! Not even when it is hurled against an obstacle with a speed hundreds of thousands times greater than that of a bullet!”

–Nikola Tesla

“A Famous Prophet of Science Looks Into the Future.” Popular Science Monthly, November, 1928.

“Up to 1896, however, I did not succeed in obtaining a positive experimental proof of the existence of such a medium. But in that year I brought out a new form of vacuum tube capable of being charged to any desired potential, and operated it with effective pressures of about 4,000,000 volts. I produced cathodic and other rays of transcending intensity. The effects, according to my view, were due to minute particles of matter carrying enormous electrical charges, which, for want of a better name, I designated as matter not further decomposable. Subsequently those particles were called electrons.”

Nikola Tesla

“Nikola Tesla Tells of New Radio Theories.”New York Herald Tribune, September 22, 1929.

“The idea of the atom being formed of electrons and protons which go whirling round each other like a miniature sun and planets is an invention of the imagination, and has no relation to the real nature of matter.

“Virtually all progress has been achieved by physicists, discoverers and inventors; in short, devotees of the science which Newton and his disciples have been and are propounding.

“Personally, it is only efforts in this direction which have claimed my energies. Similar remarks might be made with respect to other modern developments of thought. Take, for example, the electron theory. Perhaps no other has given rise to so many erroneous ideas and chimerical hopes. Everybody speaks of electrons as something entirely definite and real. Still, the fact is that nobody has isolated it and nobody has measured its charge. Nor does anybody know what it really is.

“In order to explain the observed phenomena, atomic structures have been imagined, none of which can possibly exist.

Nikola Tesla

“Great Scientific Discovery Impends.“ The Sunday Star, Washington D.C., May 17, 1931.

“My ideas regarding the electron are at variance with those generally entertained. I hold that it is a relatively large body carrying a surface charge and not an elementary unit. When such an electron leaves an electrode of extremely high potential and in very high vacuum, it carries an electrostatic charge many times greater than the normal. This may astonish some of those who think that the particle has the same charge in the tube and outside of it in the air. A beautiful and instructive experiment has been contrived by me showing that such is not the case, for as soon as the particle gets out into the atmosphere it becomes a blazing star owing to the escape of the excess charge. The great quantity of electricity stored on the particle is responsible for the difficulties encountered in the operation of certain tubes and the rapid deterioration of the same.”

–Nikola Tesla

“Dynamic Theory Of Gravity.“ July 10, 1937(Prior to interviews with the press on his 81st birthday observance).

“Before the electron theory was advanced, I had established that radio-active rays consisted of particles of primary matter not further decomposable, and the first thing to find out was whether the sun is charged to a sufficiently high potential to produce the effects noted. This called for a prolonged investigation which culminated in my discovery that the sun’s potential was 216,000,000,000 volts and that all such large and hot bodies emit cosmic rays.

“While the origin and character of the rays observed near the earth’s surface had thus been sufficiently well ascertained, the so-called cosmic rays observed at great altitudes presented a riddle for more than twenty-six years, chiefly because it was found they increased with the height at a rapid rate. My investigations brought out the astonishing fact that the effects at high altitude are of an entirely different nature, having no relation whatever to cosmic rays. These are particles from celestial bodies at very high temperatures and charged to enormous electrical potentials.

“The effects at great elevations are due to waves of extremely small lengths produced by the sun in a certain region of the atmosphere. THIS IS THE DISCOVERY I WISH TO MAKE KNOWN. The process involved in the generation of the waves is the following: The sun projects charged particles constituting an electric current which passes through a conducting stratum of the atmosphere approximately ten kilometers (six miles) thick enveloping the earth. This is a transmission of electrical energy exactly as I illustrated in my experimental lecture in which one end of a wire is connected to an electric generator of high potential, its other end being free. In this case the generator is represented by the sun and the wire by the conducting air.”

“The passage of solar current involves the transference of electric charges from particle to particle with the speed of light, resulting in the production of extremely short and penetrating waves. As the air stratum mentioned is the source of the waves it follows that the so-called cosmic rays observed at great altitude must increase as this stratum is approached.”

–Nikola Tesla

“In The Realm Of Science: Tesla, Who Predicted Radio, Now Looks Forward To Sending Waves To The Moon.” New York Herald Tribune, Aug. 22, 1937.


“I had been constructing with my assistants the first high-frequency alternators (dynamos), of the kind now used for generating power for wireless telegraphy. At three o’clock in the morning I came to the conclusion that I had overcome all the difficulties and that the machine would operate, and I sent my men to get something to eat. While they were gone I finished getting the machine ready, and arranged things so that there was nothing to be done, except to throw in a switch.

“When my assistants returned I took a position in the middle of the laboratory, without any connection whatever between me and the machine to be tested. In each hand I held a long glass tube from which the air had been exhausted. “If my theory is correct,” I said, “when the switch is thrown in these tubes will become swords of fire.” I ordered the room darkened and the switch thrown in—and instantly the glass tubes became brilliant swords of fire.

“Under the influence of great exultation I waved them in circles round and round my head. My men were actually scared, so new and wonderful was the spectacle. They had not known of my wireless light theory, and for a moment they thought I was some kind of a magician or hypnotizer. But the wireless light was a reality, and with that experiment I achieved fame overnight.

“Following this success, people of influence began to take an interest in me. I went into “society,” and I gave entertainments in return; some at home, some in my laboratory–expensive ones, too. For the one and only time in my life, I tried to roar a little bit like a lion.

“But after two years of this, I said to myself, “What have I done in the past twenty-four months?” And the answer was, “Little or nothing.” I recognized that accomplishment requires isolation. I learned that the man who wants to achieve must give up many things—society, diversion, even rest—and must find his sole recreation and happiness in work. He will live largely with his conceptions and enterprises; they will be as real to him as worldly possessions and friends.”

– Nikola Tesla

“Making Your Imagination Work for You.”By M. K. Wisehart. The American Magazine, April 1921.


“Radio Power Will Revolutionize The World.” By Alfred Albelli. Modern Mechanix, July, 1934.


This publicity photo taken at Colorado Springs was a double exposure. Tesla poses with his “magnifying transmitter” capable of producing millions of volts of electricity. The discharge here is twenty-two foot in length. The inscription on the photograph is addressed to Sir William Crookes and reads;

“To my illustrious friend Sir William Crookes of whom I always think and whose letters I never answer!“

June 17, 1901.

Nikola Tesla