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Updated: June 23, 2025
The apparatus which enables the electric waves to be revealed, the detector or indicator, is the most delicate organ in wireless telegraphy. It is not necessary to employ as an indicator a filings-tube or radio-conductor. One can, in principle, for the purpose of constructing a receiver, think of any one of the multiple effects produced by the Hertzian waves.
Steam, electricity, petrol, the Hertzian wave, harnessed nature's hidden powers, conquered distance, and shrunk the terrestrial globe to the measure of human hands. Man entered a new material world, differing not merely in degree but in kind from that of previous generations.
Take this message over there, Hiram, and let the Hertzian waves get busy with it at once." "On the jump!" answered Hill. "Better take a five-dollar bill with you," Clancy suggested. Hill picked up the bank note. "I'd like to see that money get dry before we spend it all," he complained, and then went out with the wireless message for Lafe.
He found that the waves were absorbed during the daytime much more than at night and he eventually reached the conclusion that the ultraviolet light from the sun ionized the gaseous molecules of the air, and ionized air absorbs the energy of the electric waves, so that the fact was established that clear sunlight and blue skies, though transparent to light, serve as a fog to the powerful Hertzian waves of wireless telegraphy.
Others had studied the Hertzian waves and the methods of sending and detecting them from a purely scientific viewpoint. Marconi had the vision to realize the practical possibilities, and, though little more than a boy, had assembled the whole into a workable system of communication. He richly deserves the laurels and the rewards as the inventor of the wireless telegraph.
If he hasn't, it's the identical bacillus, or Hertzian wave of tuberculosis, plus Fanny Brand and the professional status which, in conjunction with the main-stream of subconscious thought common to all mankind, has thrown up temporarily an induced Keats." Mr. Shaynor returned to his work, erasing and rewriting as before with swiftness. Two or three blank pages he tossed aside.
After that are what are known as the ultra-violet rays, which lie beyond the violet of white light. We also have electric waves, the waves of the alternating current, and shorter still we find the Hertzian waves, which are used in wireless.
We can trace these particular frequencies, called, after their discoverer, Hertzian waves, for about fifteen octaves, when we arrive at the frequency of 32,000,000,000 in a second, with a wave-length decreased to a quarter of an inch; we can render the effect of these waves visible, but have no physical organ by which we can feel these pulsations.
The pinch of dust, you see, is nickel-filings. The Hertzian waves, you see, come out of space from the station that despatches 'em, and all these little particles are attracted together cohere, we call it for just so long as the current passes through them. Now, it's important to remember that the current is an induced current. There are a good many kinds of induction "
Need we recall, in this connection, the incessant mission of pictures perceived by the sensitized plate, the vibrations of sound that accumulate in the disks of the gramophone, the Hertzian waves that lose none of their strength in space, the mysteries of reproduction and, in a word, the incomprehensibility of everything around us?
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