Category: future

Regular

“It should be borne in mind that electrical energy obtained by harnessing a waterfall is probably fifty times more effective than fuel energy. Since this is the most perfect way of rendering the sun’s energy available, the direction of the future material development of man is clearly indicated. He will live on “white coal.” Like a babe to the mother’s breast will he cling to his waterfall. “Give us our daily waterfall,“ will be the prayer of the coming generations. Deus futurus est deus aquae deiectus!”

–Nikola Tesla

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

Regular

darktiger337:

drnikolatesla:

“NIKOLA TESLA TELLS OF NEW RADIO THEORIES.”

An interview with Nikola Tesla

New York Herald Tribune, September 22, 1929.

Does Not Believe in Hertz Waves and Heaviside Layer, Interview Discloses

The model of a “Tesla Coil” which will be featured in the historic exhibit of the radio show reawakens interest in its inventor.

It is not generally appreciated that this curious apparatus, often associated with pretty or spectacular demonstrations of high voltage electricity, is really a fundamental part of modern radio. For all the tuning apparatus and circuits in every transmitting and receiving set are simply variations of Tesla coils and Tesla coil circuits.

It was for this invention, and other inventions and principles concerned with tuning, heterodyning, and the generation of continuous waves, which were made at least several years before the very first experiments of Marconi, that many of our most reputable engineers have conceded to Nikola Tesla the title of “Father of Radio”.

Mr. Tesla, still actively working, was interviewed last week to get his ideas regarding the prospects of the radio of 1930, and beyond. As a prophet, however, he balked. He had repeated time and again his visions for the future. As far back as 1900, he had contemplated a world-wireless system which included broadcasting, picture transmission, international time service, and in addition television and the distribution of electrical power. Part of this early prophecy has been realized – what remained, still stood as his prediction.

Disputes Hertz Waves

What, then, about power transmission by radio? Laurence M. Cockaday, the technical editor of this radio section, had expressed the opinion several weeks ago that, with present apparatus at least, it was hardly feasible. Mr. Tesla agreed to discuss the point at length.  As a result, he made public for the first time one of the most extraordinary conclusions – that Hertz waves do not exist! If his theory is true, there may be found in it more adequate explanations of “dead spots”, fading, reflection and a dozen other problems that have always puzzled the profession.

The inventor began by referring to Cockaday’s article:

“I have read the article, and I quite agree with the opinion expressed – that wireless power transmission is impractical with present apparatus. This conclusion will be naturally reached by any one who recognizes the nature of the agent by which the impulses are transmitted in present wireless practice.

“When Dr. 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.”

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.

At Colorado Springs, about thirty years ago, this scientist had a Tesla coil seventy-five feet in diameter which produced voltages above 12,000,000, and sparks over 100 feet long. Electrical flashes were created which were the nearest approach to lightning that man has ever made. During his experiments there, of over a year, Tesla claims that he transmitted a considerable amount of electrical current to the other side of the earth. It was upon these, and later experiments that he bases his present prediction.

If only he wasn’t blackballed by Edison… 😢

And the U.S. Government.

Regular

drnikolatesla:

Ere many generations pass, our machinery will be driven by a power obtainable at any point of the universe. This idea is not novel. Men have been led to it long ago go by instinct or reason. It has been expressed in many ways, and in many places, in the history of old and new. We find it in the delightful myth of Antheus, who drives power from the earth; we find it among the subtle speculations of one of your splendid mathematicians, and in many hints and statements of thinkers of the present time. Throughout space there is energy. Is this energy static or kinetic? If static, our hopes are in vain; if kinetic — and this we know it is for certain — then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature.”

–Nikola Tesla

“Experiments With Alternating Currents of High Potential and High Frequency.” Lecture delivered before the Institution of Electrical Engineers, London, February, 1892.

In the future the world will no longer need power plants, power lines, fossil fuels, etc., but will develop machinery that can access energy from anywhere on earth. Like Tesla indicates in the quote above, if we live amid a medium where there is no continuous flow of energy, this realization would be impossible, but if everything around us is in constant motion, which it is, then human ingenuity will find a means of converting that energy to productive uses.

Regular

Ere many generations pass, our machinery will be driven by a power obtainable at any point of the universe. This idea is not novel. Men have been led to it long ago go by instinct or reason. It has been expressed in many ways, and in many places, in the history of old and new. We find it in the delightful myth of Antheus, who drives power from the earth; we find it among the subtle speculations of one of your splendid mathematicians, and in many hints and statements of thinkers of the present time. Throughout space there is energy. Is this energy static or kinetic? If static, our hopes are in vain; if kinetic — and this we know it is for certain — then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature.”

–Nikola Tesla

“Experiments With Alternating Currents of High Potential and High Frequency.” Lecture delivered before the Institution of Electrical Engineers, London, February, 1892.

Regular

“NIKOLA TESLA FOR THE FIRST TIME DESCRIBES HIS NEW SYSTEM FOR SUPPLYING WIRELESS POWER TO RUN ALL THE EARTH’S INDUSTRIES.”

By Marcel Roland. New York American, September 3, 1911.

By a series of discoveries and inventions just perfected, Nikola Tesla, the electrical scientist, has upset what has hitherto been regarded as one of the fixed laws of nature. Every effect diminishes with distance,” is the way the textbooks have expressed it.

Tesla now says that instead of decreasing like other forces, electricity may be made to increase in intensity with the distance traveled.

The full significance of this discovery may not be at once apparent. It is obvious, however, that it annihilates space. There can be no limit to the power of the electric wave which increases in intensity the further it travels.

For nearly 20 years Tesla has been working on his plan, he calls it his wireless “World System.” If it is put into successful execution it will convert the earth into a gigantic conduit, which will pass power for all earthly activities, and make possible communication with other planets.

From time to time Tesla has made partial announcements as his work progressed. This, however, is the first comprehensive account of his system as a whole that the inventor has consented to give to the world.

“Through ages past man has anyways attempted to project in some way or other energy into space. In all his attempts, no matter what agent he employed, he was hampered by the inexorable law of nature which says every effect diminishes with distance, generally as the square of the same, sometimes more rapidly.

“I saw at once that space was annihilated in all the three aspects; in the transport of our bodies and materials and in the earth, transmission of the energies necessary for our existence. You can imagine how profoundly I was affected by this revelation. Technically, it meant that the earth, as a whole, had certain periods of vibrations, and that by by impressing electrical vibrations of the same periods upon it, it could be thrown into oscillations of such nature that innumerable benefits could be derived.

“It is difficult to convey an idea of these inventions without resorting to technical terms. The first and best known of these is my transformer, which enables the production of electrical vibrations of transcending intensities. I have already attained activities of many millions of horse power; but this is nothing compared to those which I am expecting to get with my improved apparatus.

“The second is what I have termed my magnifying transmitter, which I look upon as my best electrical invention, and with which any distance can be bridged. I have already passed of this wonderful instrument and am confident that a message can be flashed to such a distance as the planet Mars.

“Some technical men would be disposed to look upon such statements as those of a dreamer, but it is only because they have not had opportunities to see experiments which I have actually performed. The third invention I have designated as the “Art of individualization,” which enables the transmission of an unlimited number of messages through a wire or wireless, without the slightest interference. Not before this improvement is universally adopted will the world fully realise the benefits of telegraphy and telephony. The fourth invention is my receiver, which concentrates the energy transmitted over a wide area into the operating device.”

What would the voltage in your transmitter be?

“In the transmission of telegraphic and telephonic messages I shall employ from five to ten million volts, but in transmitting power in great quantities, as much as one hundred million volts will be used.“

How will your “World System” compare with those now in use as regards to cost?

“We could easily afford to offer a transmission of telegraphic and telephonic messages to any terrestrial distance for five cents a word. In a short while no one will think it anything out of the way to dictate or to write a long letter across the Pacific.”

How long does it take for the transmission of a message, by your system, around the world?

“The exact time is, according to my measurements, 43-1000 of a second, which is a speed about 50 per cent greater than that of light.

“The impulse starts from my magnifying transmitter with infinite speed, slows first rapidly and then at a lesser rate until, when it has penetrated to a distance of 6000 miles from the transmitter, it proceeds with approximately the speed of light. From there on it accelerates, first slowly and then more rapidly, and reaches the opposite point of the globe again with infinite speed only to rebound and pass through the same phases on its way back to the transmitter.

“This movement of electricity through the Earth, which takes place strictly in accordance with a mathematical law, and enables a great number of accurate measurements and determinations to be made, which are of immense practical and scientific value.”

Is your universal marine service based upon this principle?

“Largely so. In setting up and maintaining stationary waves in the earth its entire surface is subdivided in perfectly definite zones of electric activity, so that any observer of all those data which are of importance to navigators as the latitude and longitude, the position with reference to a given point, the speed of travel, and the course followed. This method is quite exact and reliable, and once introduced will be instrumental in a great saving of time, life and property.”

When your system of time distribution is introduced what kind of devices will be used for indicating the hour?

“They will be ever so much simpler than the ordinary clocks or watches, being entirely devoid of wheel work. For personal use a small case will be provided resembling that of a watch which would indicate precisely the time and require no more attention than a compass for instance. The large clocks on towers and public edifices in general will be replaced by extremely simple devices operated on the same principle.

“All these will be ‘tuned’ to a wireless wave sent out at a certain time. This will automatically set the hands of every ‘tuned’ time piece.”

In operating stock tickers, will the present instruments have to be replaced by others?

“Not at all, they will remain intact. A great financier told me that this should be one of the most valuable and practical applications of my system, inasmuch as the instantaneous operation of such instruments all the world over will go far toward allaying panics and failures which are at present mostly due to the inadequacy and stagnation of channels of information.”

“A business man will be able to dictate in his office a letter which will appear in type at any other place he wishes without loss of time in the transmission. It will be exactly as though he had his stenographer close by. In the same manner it will be practicable to send a handwritten letter or even a check, and what is more important, it will not be possible to falsify the signature.”

Will the transmission of complex musical productions require complicated apparatuses?

Not at all. The apparatus at any of the master plants, transmitting a great number of musical compositions, will be of necessity complicated, but the subscriber will need only a telephone receiver, and, if he desires exclusiveness, and individualizing device in connection, which, however, will be rarely required. He will be none the less able to listen to the most complex opera played in some remote party of the world. What is more, he can carry the entire outfit with him on his walks and travels, and whenever he desires to listen to the music he can do so.

The wireless system which I have developed does not contemplate competition with established lighting systems in densely populated districts, but it offers an ideal solution for the illumination of isolated places. The light will be furnished by exhausted glass tubes, bent in all sorts of ornamental shapes, and is of surpassing beauty, resembling closely the daylight. The lamps will last forever. The entire apparatus for lighting the average country dwelling will contain no moving part whatever, and could be readily carried about in a small valise. It will be quite immaterial in which region of the earth the house to be lighted is located. Distance will not affect the charge.“

How far from the Earth’s surface can power be transmitted by this wireless system?

“To any distance; in fact, the greater the elevation above the ground that easier it is to supply the power to the vehicle, such as an airship crossing the ocean.”

What do you consider the most important application of your system?

The transmission of power, of course. The operation of aerial machines alone will be of a revolutionizing influence, in as much as it will afford a perfect solution of this important problem. Another great field will be the irrigation and fertilization of the soil by wireless power. The time is not distance when a farmer will have installed on his place an apparatus for continuously manufacturing, from the gases of the atmosphere, nitric compounds which will be used to fertilize, while a motor will pump the water and perform other duties; all the energy being supplied from a plant perhaps thousands of miles away. This system can be extended so as to make productive vast tracts of now barren lands located in various countries. I believe that the export of wireless power will be one of the chief resources of the United States and other fortunately situated countries in times to come.“

Regular

mac3air:

drnikolatesla:

Tesla Cosmic Ray Motor to Transmit Power ‘Round Earth.”

“I have harnessed the cosmic rays and caused them to operate a motive device,“ declared Nikola Tesla, famous scientist, in an interview last evening on the eve of his 76th birthday.

Tesla, who all his life has worked in seclusion and struggles to avoid publicity with all the vigor with which movie stars court it, permits a handful of “science writers” to violate the rules as a sort of birthday party.

It is very much of an ordeal to the tall, straight, meticulously attired gentleman whose inventions have been epoch-making and who is unable to understand why the public should be interested in him.

“Cosmic ray investigation is a subject that is very close to me. I was the first to discover these rays and I naturally feel toward them as I would toward my own flesh and blood,” said Dr. Tesla.

His statement is borne out by reference to clippings of interviews with him more than a quarter of a century ago in which he discussed “penetrating rays” and to which not much attention was given as no one was able to comprehend the nature of them as he discussed them.

“I have advanced a theory of the cosmic rays and at every step of my investigations I have found it completely justified.” said Dr. Tesla.

Dr. Tesla stated that the amount of power he was able to develop in the device was insignificant.

I asked him if its power output was of the same magnitude as that of Crookes’ radiometer, the device with four vanes in a glass tube that are rotated by sunlight, and which is often seen in jewelers’ windows. He stated that the power output was many thousand times that of a Crookes’ radiometer.

“The attractive features of the Cosmic rays is their constancy. They shower down on us throughout the whole 24 hours, and if a plant is developed to use their power it will not require devices for storing energy as would be necessary with devices using wind, tide or sunlight.”

“All of my investigations seem to point to the conclusion that they are small particles, each carrying so small a charge that we are justified in calling them neutrons. They move with great velocity, exceeding that of light.

“More than 25 years ago I began my efforts to harness the cosmic rays and I can now state that I have succeeded in operating a motive device by means of them.”

I was able to prevail upon Dr. Tesla to give me some idea of the principle upon which his cosmic ray motor works.

“I will tell you in the most general way,” he said. “The cosmic ray ionizes the air, setting free many charges—ions and electrons. These charges are captured in a condenser which is made to discharge through the circuit of the motor.”

“I have hopes of building my motor on a large scale, but circumstances have not been favorable to carrying out my plan.”

I asked Dr. Tesla if his plan for transmission of power between planets involved the use of cosmic rays, and he stated that the two projects have no connection whatever. He stated that he has continued his experimental work in the laboratory on the interplanetary power transmission project and is certain of its feasibility.

I also asked him if he is still at work on the project which he inaugurated in the ‘90’s of transmitting power wirelessly anywhere on earth. He is at work on it, he said, and it could be put into operation.

He at that time announced two principles which could be used in this project. In one the ionizing of the upper air would make it as good a conductor of electricity as a metal.In the other the power would be transmitted by creating “standing waves” in the earth by charging the earth with a giant electrical oscillator that would make the earth vibrate electrically in the same way a bell vibrates mechanically when it is struck with a hammer.

“I do not use the plan involving the conductivity of the upper strata of the air,” he said, “but I use the conductivity of the earth itself, and in this I need no wires to send electrical energy to any part of the globe.”

(Interview by John O’Neill. Brooklyn Eagle, July 10, 1932.)

Wish we could have seen it in operation

Regular

dpowersinc:

drnikolatesla:

Tesla Cosmic Ray Motor to Transmit Power ‘Round Earth.”

“I have harnessed the cosmic rays and caused them to operate a motive device,“ declared Nikola Tesla, famous scientist, in an interview last evening on the eve of his 76th birthday.

Tesla, who all his life has worked in seclusion and struggles to avoid publicity with all the vigor with which movie stars court it, permits a handful of “science writers” to violate the rules as a sort of birthday party.

It is very much of an ordeal to the tall, straight, meticulously attired gentleman whose inventions have been epoch-making and who is unable to understand why the public should be interested in him.

“Cosmic ray investigation is a subject that is very close to me. I was the first to discover these rays and I naturally feel toward them as I would toward my own flesh and blood,” said Dr. Tesla.

His statement is borne out by reference to clippings of interviews with him more than a quarter of a century ago in which he discussed “penetrating rays” and to which not much attention was given as no one was able to comprehend the nature of them as he discussed them.

“I have advanced a theory of the cosmic rays and at every step of my investigations I have found it completely justified.” said Dr. Tesla.

Dr. Tesla stated that the amount of power he was able to develop in the device was insignificant.

I asked him if its power output was of the same magnitude as that of Crookes’ radiometer, the device with four vanes in a glass tube that are rotated by sunlight, and which is often seen in jewelers’ windows. He stated that the power output was many thousand times that of a Crookes’ radiometer.

“The attractive features of the Cosmic rays is their constancy. They shower down on us throughout the whole 24 hours, and if a plant is developed to use their power it will not require devices for storing energy as would be necessary with devices using wind, tide or sunlight.”

“All of my investigations seem to point to the conclusion that they are small particles, each carrying so small a charge that we are justified in calling them neutrons. They move with great velocity, exceeding that of light.

“More than 25 years ago I began my efforts to harness the cosmic rays and I can now state that I have succeeded in operating a motive device by means of them.”

I was able to prevail upon Dr. Tesla to give me some idea of the principle upon which his cosmic ray motor works.

“I will tell you in the most general way,” he said. “The cosmic ray ionizes the air, setting free many charges—ions and electrons. These charges are captured in a condenser which is made to discharge through the circuit of the motor.”

“I have hopes of building my motor on a large scale, but circumstances have not been favorable to carrying out my plan.”

I asked Dr. Tesla if his plan for transmission of power between planets involved the use of cosmic rays, and he stated that the two projects have no connection whatever. He stated that he has continued his experimental work in the laboratory on the interplanetary power transmission project and is certain of its feasibility.

I also asked him if he is still at work on the project which he inaugurated in the ‘90’s of transmitting power wirelessly anywhere on earth. He is at work on it, he said, and it could be put into operation.

He at that time announced two principles which could be used in this project. In one the ionizing of the upper air would make it as good a conductor of electricity as a metal.In the other the power would be transmitted by creating “standing waves” in the earth by charging the earth with a giant electrical oscillator that would make the earth vibrate electrically in the same way a bell vibrates mechanically when it is struck with a hammer.

“I do not use the plan involving the conductivity of the upper strata of the air,” he said, “but I use the conductivity of the earth itself, and in this I need no wires to send electrical energy to any part of the globe.”

(Interview by John O’Neill. Brooklyn Eagle, July 10, 1932.)

Amazing!

Regular

“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.

Regular

“Ere many generations pass, our machinery will be driven by power obtainable at any point of the Universe…

“Throughout space there is energy. Is this energy static or kinetic? If static our hopes are in vain; if kinetic—and this we know it is, for certain—then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature.“

–Nikola Tesla

“Experiments With Alternating Currents of High Potential and High Frequency.” Lecture delivered before the Institution of Electrical Engineers, London, February 1892.

Regular

“TESLA’S RAY.”

Time, July 23rd, 1934.

He has produced nothing tangible for a long time, but he still remains one of the foremost living inventors of electrical apparatus. His day comes once a year. On his birthday Manhattan newshawks seek him out in some hotel, listen closely to his words. Wearing an outmoded brown suit, he received the Press one day last week in a Hotel New Yorker reception room. That day Nikola Tesla was 78.

"The first thing Nikola Tesla invented was a hook for catching frogs. That was not long after he learned to talk, in the Croatian hamlet of Smiljan where he was born. He studied physics and mathematics at two universities, got into telegraph engineering, went to Budapest, to Paris, to the U. S. in 1884 to work for Thomas Edison. Soon he had a research laboratory of his own. Four years later he patented the induction motor, first effective utilization of alternating current. He discovered the rotary magnetic field principle used today in the hydroelectric plants at Niagara Falls. He invented dynamos, transformers, induction coils, condensers, arc and incandescent lamps. He was acclaimed a great genius.

"All that was long ago and Tesla has lingered on into a twilight of semi-obscurity. His hotel room is now his only laboratory, his brain his only tool. When callers importune him he takes a bath or goes to bed. When he talks about his work his deep-set blue eyes burn with an icy fire. He walks prodigious distances through the city streets. His most valued friends are the New York Public Library’s somnolent pigeons. A life-long bachelor, Dr. Tesla is tall, spare, erect, parchment-skinned, beak-nosed. The mustache he once wore is gone.

"Even at the peak of his renown he had great visions. In 1900 he was ready to cure tuberculosis with oscillating electricity. In 1909 he promised motors capable of driving ocean liners at 50 knots. In 1911 it was storm-proof dirigibles without propellers. In the last decade his annual utterances have been mostly rehashes of previous interviews, with something new every three or four years. In 1924 he was planning to transmit power by radio. In 1927 he was scheming to harness sea power. In 1931 he would make all fuels superfluous by tapping cosmic energy. Last week Dr. Tesla announced a combination of four inventions which would make war unthinkable.

"Nucleus of the idea is a death ray — a concentrated beam of sub-microscopic particles flying at velocities approaching that of light. The beam, according to Tesla, would drop an army in its tracks, bring down squadrons of airplanes 250 miles away. Inventor Tesla would discharge the ray by means of: 1) a device to nullify the impeding effect of the atmosphere on the particles; 2) a method for setting up a high potential; 3) a process for amplifying that potential to 50,000,000 volts; 4) creation of “a tremendous electrical repelling force.” Two of these are complete in Dr. Tesla’s mind. The other two await minor details.

"Dr. Tesla pointed out that the weapon is purely one of defense, since his beam must be generated in great immovable power plants. With generators set up on all the world’s national boundaries, no country would ever again be able to attack another. Further details, said Dr. Tesla, would be unfolded before the Geneva Disarmament Conference.

"The death ray, always exciting to laymen, is an old familiar to scientists. After the interplanetary “space ship,” it is probably the most popular gadget in pseudoscientific fiction. Even in Herbert George Wells’s shrewdly written War of the Worlds (1898), the first act of arriving Martians is to spray spectators with a death beam. In real life death rays have been announced time & again, but never convincingly demonstrated. When one Harry Grinnell-Matthews loudly announced a death ray some years ago in England, Physicist Robert Williams Wood of Johns Hopkins said he would stand 65 ft. from the apparatus and invite Mr. Grinnell-Matthews to turn on his radiations full blast. Last month in Omaha the Inventors’ Congress was informed by its President Albert G. Burns that he had witnessed a death ray demonstration staged by a Clevelander named Antonio Longoria. Rabbits, dogs and cats, said President Burns, were killed instantly, their blood turned to water. But Inventor Longoria said he would withhold his secret until invasion threatened the U. S.

"Excellent is Dr. Tesla’s health, but he looks now & then beyond the grave. When he is reminded that in some quarters his pronouncements are written off as senile hallucinations. he replies with simple dignity: “The opinion of the world does not affect me. I have placed as the real values in my life what follows when I am dead.”