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"The wind-ripples on the surface of the dunes precisely resemble the water-ripples of sand flats occasionally overflowed by the sea; and with the closest scrutiny, I have never been able to detect the slightest difference between them. This is easily explained by the fact, that the water-ripples are produced by the action of light wind on the water which only transmits the air-waves to the sand."
Looking back I saw the dome of the Invalides suspended in space, like a cloud in the sky. It was painted over to baffle the way of hostile aircraft, but the paint was wearing off, and the gold showed through again, glinting and flashing in the air-waves.
The vibrance scarcely seemed to be sound, rather did it seem to be a slower tapping of air-waves on the drum of the ear, too low to be actually heard, but yet beating with a maddening persistence. There was a savagery in the sound, so disquieting, that a deep sigh of relief escaped from the boy's lungs when he saw the lights of Millot twinkling in the distance.
That'll kill those air-waves." Scarcely were they back within range of the fleet when DuQuesne, reaching for his gun to fire the first shot, leaped backward with a yell. "Beat it!" Once more at a safe distance, DuQuesne explained. "It's lucky I'm so used to handling hot stuff that from force of habit I never make close contact with anything at the first touch.
It was a novel experience to read these glowing descriptions of incidents still fresh in their minds descriptions which had in some cases flown by wire, in others by air-waves, from point to point, more than half-way around the world.
Most of the wireless news is not only wireless, but it is in cipher hence prophets, or men who have great sensitiveness; men whose souls and bodies are films for the future, platinum plates for the lights and shadows of events; men who are world-poets, sensitive to the air-waves and the light-waves of truth, to the faintest vibrations from To-morrow, or from the next hundred years hovering just ahead.
All the movements going on outside, however violent and varied they may be, cannot of themselves make sound. But here, in the little space behind the drum of our ear, the air-waves are sorted and sent on to our brain, where they speak to us as sound. Week 18 But why then do we not hear all sounds as music? Why are some mere noise, and others clear musical notes?
The object of these pages will be to show how closely Music, and indeed Art in general, has woven itself into the pattern of our lives, and how intimately it may influence and fashion the design. The structural basis of Music is vibration. Sound comes to us in the guise of air-waves, which impinge upon the drum of the ear.
These, like the air-waves, were also registered by self-acting tide-gauges and by personal observation all over the world, and the observations coincided as to date with the great eruptions of the 26th and 27th of August.
On that day all the gas lights were extinguished in Batavia, and the pictures rattled on the walls as though from the action of an earthquake. But there was no earthquake. It was the air-wave from Krakatoa, and the noise produced by the air-waves that followed was described as "deafening."
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