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Updated: May 2, 2025
"Folks laughed at Morse when he said he could send a message over the wire. He let 'em laugh, but we have the telegraph. Folks laughed at Edison, when he said he could take the human voice or any other sound and fix it on a wax cylinder or a hard-rubber plate but he did it, and we have the phonograph.
Regulators composed of two metals, such as aluminum and steel, are best. Wafers filled with ether or similar liquid are more sensitive but weaker in action. Hard-rubber bars are frequently used.
Her ears were cocked forward; her surprised face was almost ridiculously human in its expression. Cap'n Ira groaned again. He shuddered. But his gnarled hand gripped the hard-rubber butt of the revolver with the desperation of the deed he had screwed his courage to do. Better the old mare should be put out of the way than that she should fall into hands that would misuse her.
A gentle tap or two on that hard-rubber shell and you will know its secret." He laid the instrument with its little case beside it on the table in front of the King and left the room escorted by a member of the Royal Family, young Prince George of Windthorst, who insisted upon acting as his guide to the Green Drawing Room.
Not long after, in 1828, yet another French physician, Piorry, perfected the method of percussion by introducing the custom of tapping, not the chest directly, but the finger or a small metal or hard-rubber plate held against the chest-mediate percussion, in short.
Throughout the voyage Edestone kept very much to himself and in his quarters occupied himself constructing a new instrument, and to the hard-rubber case that had been provided for it he attached a wireless receiver. In some of this work he was assisted by Stanton and Black, two electricians he had brought with him, who, with James, his valet, made up his party.
A strip of hard rubber with pointed ends rests perpendicularly on a platinum plate, beneath which is a carbon button, under which again lies another platinum plate. The two plates and the carbon button form part of an electric circuit containing a battery and a galvanometer. The hard-rubber strip is exceedingly sensitive to heat.
The possession of a knife once more, and of steel wherewith readily to strike fire, delighted the man enormously. The scissors they found in a hardware-shop, though rusty, enabled him to trim his beard and hair. Beatrice hailed a warped hard-rubber comb with joy.
Get on one of the plates," and he motioned to one of the hard-rubber platforms that was not occupied. The roar and rumble of the storm outside had given place to short terrific crashes. In their small cave the adventurers could feel the solid ground shake. A bluish light began dancing about the electrical wires. There was a smell of sulphur in the air. Crash after crash resounded outside.
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