| 单词 | Hertzian |
| 例句 | It produces a wave in it, and it can be shown that all the parts of the above described siren apparatus have their electrical equivalents in the transmitter employed in Hertzian wave wireless telegraphy. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z At ten minutes past twelve to the instant it is agreed that number seven, let us say, is to receive the force of the Hertzian waves for a certain definite period. Chance in Chains A Story of Monte Carlo 2011-10-03T02:00:32.613Z Steam, electricity, petrol, the Hertzian wave, harnessed nature’s hidden powers, conquered distance, and shrunk the terrestrial globe to the measure of human hands. The Rising Tide of Color Against White World-Supremacy 2011-09-13T02:00:33.070Z Such a hypothesis is no more extravagant than would have been the hypothesis of the Hertzian waves or a prediction of wireless telegraphy a few short years ago. Occultism and Common-Sense 2011-07-16T02:00:14.303Z And then the tone grew higher and ultra-violet; the air darkened with vapors; the shrillness was so exceeding that it modulated into Hertzian waves and merged into light; this vibratile, argent light pierced Stannum's eyes. Melomaniacs We may next proceed to apply these principles to the explanation of the action of the simplest form of Hertzian wave telegraphic radiator, viz., the Marconi aerial wire. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z A. Popoff sent Hertzian wave messages over a distance of 3 miles. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use Or do the Hertzian waves come through the ground, as some say?” The Campfire Girls of Roselawn Or, a Strange Message from the Air I gave particulars of the great discoveries and rapid developments in connection with electricity, wireless telegraphy, the telephone, Hertzian waves, X and N rays, spectroscopy, colour-photography, and telectrography. To Mars via The Moon An Astronomical Story State briefly the electromagnetical constituents of the Aurora Borealis, and explain their relation to the Hertzian Waves. This Giddy Globe In subsequently dealing with the details of transmitting arrangements, attention will be directed to the necessity for what telegraphists call a "good earth" in connection with Hertzian wave telegraphy. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z The property of cohesion of small conductive bodies when influenced by Hertzian waves was first noticed in 1874 by Professor D.E. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use Steam, electricity, petrol, the Hertzian wave, harnessed nature's hidden powers, conquered distance, and shrunk the terrestrial globe to the measure of human hands. The New World of Islam Those below the red are called the Infra-red, and they are the Hertzian waves, or those used in wireless telegraphy. Electricity for Boys Define the difference between the Hertzian Wave and the Marcel Wave. This Giddy Globe But such a coil, although it may look very pretty on the lecture table, is yet very unsuited to positions in which it may be used in connection with Hertzian wave telegraphy. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Radio-telegraphy might be briefly traced in the names of Faraday, Maxwell, Hertz—the discoverer of the Hertzian rays—Righi, Lodge and Marconi. The Brighton Boys in the Radio Service It was opaque to all forms of radiation known from the longest Hertzian to the shortest cosmics, save for the very narrow band of visible light. Invaders from the Infinite And as each word fluttered off on its restless Hertzian wings, like a flock of hurrying carrier-pigeons through the night, the woman listened and translated and read, word by word. Phantom Wires A Novel In studying the changes of conductivity produced in metallic particles by the stimulus of Hertzian radiation, I have often noticed that whereas feeble radiation produces one effect, strong radiation produces the opposite. Response in the Living and Non-Living This relation may be theoretically deduced as follows:—Any given receiving apparatus for Hertzian wave telegraphy requires a certain minimum energy to be imparted to it to make it yield a signal. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Practical physics has given us wireless telegraphy by means of the Hertzian vibrations of the ether. Social Life in the Insect World The analogy then becomes quite close, and in the remaining rays the properties, so to speak, characteristic of the Hertzian waves, begin to appear. The New Physics and Its Evolution There was a silence of a minute or two, and then the mysterious Hertzian voice lisped out once more. Phantom Wires A Novel We know that a Hertz resonator sends into the ether Hertzian waves that are identical with luminous waves; an incandescent body must then be regarded as containing a very great number of tiny resonators. A Librarian's Open Shelf We have to consider in the next place the arrangements of the receiving station and the various forms of receivers that have been devised for effecting telegraphy by Hertzian waves. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z One of his Italian teachers was Professor Righi, who had made a close study of the Hertzian waves, and who was himself making no small contributions to the advancement of the science. Masters of Space Morse, Thompson, Bell, Marconi, Carty Electrical Oscillations: Hertz's experiments— Blondlot proves electromagnetic disturbance propagated with speed of light—Discovery of ether waves intermediate between Hertzian and visible ones—Rubens' and Nichols' experiments—Hertzian and light rays contrasted—Pressure of light. The New Physics and Its Evolution These electric waves have been named "Hertzian waves," in honour of their discoverer; but it remained for Marconi, who first conceived their value, to put them to practical use. Stories of Inventors The Adventures of Inventors and Engineers "You've got a charged wire——" "Charged with Hertzian waves which vibrate, say, two hundred and thirty million times a second." Traffics and Discoveries Before concluding these articles we shall return to this subject of electric resonance and syntony, and discuss it with reference to what is called the tuning of Hertzian wave stations. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Though several walls intervened, the Hertzian waves traversed them without difficulty, and messages were sent and received. Masters of Space Morse, Thompson, Bell, Marconi, Carty One can, in principle, for the purpose of constructing a receiver, think of any one of the multiple effects produced by the Hertzian waves. The New Physics and Its Evolution It was an article in an electrical journal describing the properties of the "Hertzian waves" that suggested to young Marconi the possibility of sending messages from one place to another without wires. Stories of Inventors The Adventures of Inventors and Engineers The Hertzian waves wouldn't be strong enough to work a great heavy Morse instrument like ours. Traffics and Discoveries This question shows that even in 1892 the idea that the effect of the spark on the Branly tube was really due to Hertzian waves was only just beginning to arise. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z The Hertzian waves might be all right to operate scientific playthings, they thought, but they were far too uncertain to furnish a medium for carrying messages in any practical way. Masters of Space Morse, Thompson, Bell, Marconi, Carty With the Hertzian oscillations all these conditions are changed—the damping is very rapid but the direction remains invariable. The New Physics and Its Evolution Of course those who went before him, who discovered the principles of the electric telegraph made it possible for the Hertzian waves to be utilized in wireless. Marvels of Modern Science It's just It— what we call Electricity, but the magic—the manifestations—the Hertzian waves—are all revealed by this. Traffics and Discoveries The chief object of the lecture was to describe the properties of Hertzian waves and their reflection, absorption and transmission, and many brilliant quasi-optical experiments were exhibited. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Others had studied the Hertzian waves and the methods of sending and detecting them from a purely scientific viewpoint. Masters of Space Morse, Thompson, Bell, Marconi, Carty The principle of the thing," said Captain Shirley, talking to us but watching the moving light intently, "briefly, is that I use the Hertzian waves to actuate relays on the Z99. The Dream Doctor What are now called "Hertzian waves" are waves apparently identical with light waves, but of much lower pitch or period. A History of Science — Volume 3 The contention has been raised that large power stations producing electric waves will therefore play havoc with Hertzian wave telegraphy on a smaller scale, such as the ship to shore and intermarine communication. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z It is marvellously simple, ingenious and yet effective, as a Hertzian wave telegraphic receiver. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Close to the Poldhu station is an isolated mast, which was equipped by Mr. Marconi with a Hertzian wave apparatus, similar to that he places on ships. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z It may be well to note at this point the disadvantages that are possessed by any form of coherer as a telegraphic kumascope in connection with proposed arrangements for the isolation of Hertzian wave stations. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z The matter most interesting to the public at the present time is the long-distance telegraphy by Hertzian waves to the accomplishment of which Mr. Marconi has devoted himself with so much energy of late years. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z The particular work entrusted to him was that of planning the electrical engineering arrangements of the first power station erected for the production of electric waves for long-distance Hertzian wave telegraphy at Poldhu, in Cornwall. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Whilst on the subject of magnetic wave detectors, the author may describe experiments that he has been recently making to construct a Hertzian wave detector on the Rutherford principle, which shall be strictly quantitative. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z The accomplishment of very long distances by Hertzian wave telegraphy is, however, not merely a question of power, it is also a question of wave-length. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z In other words, clear sunlit air, though extremely transparent to light waves, acts as if it were a slightly turbid medium for long Hertzian waves. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z It has been found, however, that the effect simply amounts to this, that rather more power is required by day than by night to send signals by Hertzian waves over long distances. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z These experiments were all made between ships of the British Royal Navy, furnished with Hertzian wave telegraphy apparatus on the Marconi system. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z The important matter, however, in connection with the use of the relay in Hertzian wave telegraphy, is that it should be capable of adjustment without extraordinary skill. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z We may, therefore, in conclusion, review a few of the outstanding problems awaiting solution in connection with Hertzian wave wireless telegraphy. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z At the present moment, our mode of generating Hertzian waves involves a dissipation of energy in the form of the light and heat of the spark. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Hertzian wave telegraphy is sometimes described as being extravagant in power, but, as a matter of fact, the most remarkable thing about it is the small amount of power really involved in conducting it. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z On the other hand, Hertzian wave manufacture is not altogether a matter of power. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z It remains, then, to consider some of the questions connected with practical Hertzian wave telegraphy and the problem of the limitation of communication. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Whilst there are many matters connected with the commercial aspect of Hertzian wave telegraphy with which we are not here concerned, there is one on which a word may properly be said. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z The Hertzian radiator is an appliance for acting on the ether as the siren acts on the air. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z As this phenomenon lies at the very root of Hertzian wave wireless telegraphy, we must spend a moment or two in its careful examination. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z The problem, therefore, of long-distance telegraphy by Hertzian waves is largely, though not entirely, a matter of associating sufficient energy with the aerial wire or radiator. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z A matter which has been in dispute in connection with practical Hertzian wave telegraphy is how far this electrical tuning is a sufficient solution of the practical problem of isolation. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z In the use, however, of the coil for Hertzian wave telegraphy, with all interrupters except the Wehnelt break a condenser of suitable capacity must be joined across the break points. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z Hence, all active Hertzian wave telegraph stations, like all active volcanoes, are generally found near the sea. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z |
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