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Updated: June 6, 2025
Before we reached it, several ominous dust-clouds hung on our right for hours, while beyond the river were others, indicating the presence of herds. Summer weather had already set in, and during the middle of the day the glare of heat-waves and mirages obstructed our view of other wayfarers like ourselves, but morning and evening we were never out of sight of their signals.
The motion of ether-particles thus caused may be represented by vibrations, which form the starting-point of light and heat-waves. In quite a similar manner we may also, according to Dr. Siemens, represent the light-phenomenon occurring when an electric current is sent through gases, which always takes place when the maximum of polarization belonging to them is exceeded.
Besides, there was the heat; always, during the past ten days, there had been the heat, unprecedented for June, with the thermometer climbing higher and higher and breaking a new record every day. As I threw off coat and hat and dropped into the chair before my desk, I could see the heat-waves quivering up past the open windows from the fiery street below.
This distorted shape is due to the mirage caused by the cold, just as heat-waves above the rails on a railroad-track distort the shape of objects beyond. The south sides of the lofty peaks have for days reflected the glory of the coming sun, and it does not require an artist to enjoy the unexampled splendor of the view.
When we were talking about the clouds we learnt that from every wet place, as well as from the seas, lakes, and rivers, water is constantly being drawn up, so that we can see it again in the fleecy clouds which float across the sky, and again when it comes down in the showers which water the earth the tiny heat-waves are the messengers which perform this work of evaporation.
Outlaw and deputy jogged down the long, glaring flats enshrouded in the dust-fog which rose from their ponies' hoofs; mile after mile of weary riding under a scorching sun. They climbed by winding trails through narrow cañons where the heat-waves jigged endlessly among the naked rocks. They camped by lonely water-holes and shared each other's blankets under the big yellow stars.
Until there came a day when they traveled from dawn until long after sunset before they encountered any water; and this lay lukewarm in hollows of the sandstone, accumulations from rains of long ago. The earth was hard and dry and there were stretches where there was no earth at all, only a rubble of sharp rock fragments radiating heat-waves under the glaring sun.
He burst forward into even greater speed, clung to it grimly, forged into a position well in the lead. And he held this place around him frenzied horses, frantic riders; behind him, to the distant rear, shot after shot echoing over the desert; before him the baking sands, shimmering heat-waves, sullen and silent.
"Just as the vibrations of heat-waves," he said after a pause, "can alter the form of a metal by melting it, so the vibrations of sound can alter the form of a thing by inserting themselves between those whirling molecules and changing their speed and arrangement change the outline, that is." The idea seemed fairly to buffet the little secretary in the face, but Mr.
The sleeves of his shirt were seen to swell and then grow hard and taut with vast play of muscle beneath. His head bowed lower between his shoulders, and those shoulders trembled, and the muscles over them quivered like heat-waves rising of a spring morning.
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