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Updated: June 23, 2025
For the synthesis of light to be realized, still other conditions must be complied with. During a luminous impression, the direction and the phase change millions of times in the vibration sensible to the retina, yet the damping of this vibration is very slow. With the Hertzian oscillations all these conditions are changed the damping is very rapid but the direction remains invariable.
They've given us light, both ultra-violet and visible, sound, infra-sound, and electricity I don't know what's left unless they give us a new kind of X-rays, or Hertzian, or infra-red heat waves, or...." "That's it, heat!" exclaimed Seaton. "They produce heat by means of powerful wave-generators and by setting up heavy induced currents in the armor. They can melt arenak that way."
Woodward stood close beside him. "As you know," Arnold remarked, "by the use of an aerial, messages may be easily received from any number of stations. Laws, rules, and regulations may be adopted by the government to shut out interlopers and to plug busybody ears, but the greater part of whatever is transmitted by the Hertzian waves can be snatched down by this wireless detective of mine.
Instantly a couple of hundred feet below us, on the dark and rippling water, a light broke forth. Another signal, and the light changed. It was moving. "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.
It was this habit of careful and persistent study that made it possible for Marconi to accomplish such wonderful things at an early age. Marconi had learned of the Hertzian waves. It occurred to him that by their aid wireless telegraphy might be accomplished.
The analogy then becomes quite close, and in the remaining rays the properties, so to speak, characteristic of the Hertzian waves, begin to appear. For these waves, as we have seen, the most transparent bodies are the most perfect electrical insulators; while bodies still slightly conducting are entirely opaque.
And in this connection we must not forget that a gap occurs between the "dark heat" groups and the Hertzian group, consisting of five octaves of waves, the lengths of which have been theoretically calculated, but whose action has not yet been discovered.
The inventor placed it in a box easily carried by a man, including a battery, and mounted on an ordinary camera tripod so that the user might well be taken for a travelling photographer. It is good in one direction only, but I have a signalling-bell here that can be rung from the other end by Hertzian waves. Thank Heaven, it's compact and simple. "O'Connor," he went on, "it is as I told you.
All this, I agree, sounds incredible, but really it is hardly any more so than the wonders of radioactivity, of the Hertzian waves, of photography, electricity or hypnotism, or of generation, which condenses into a single particle all the physical, moral and intellectual past and future of thousands of creatures.
Men of science doubted his statements and scoffed at his claims. 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. Then, as progress was made and Marconi began to prove his system, the inevitable jealousies arose.
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