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After thorough investigation of the magnetic qualities of different kinds of iron, Edison began to make a study of winding the cores, first determining the electromotive force generated per turn of wire at various speeds in fields of different intensities.
The heating of the glass by the projected particles was found to be always greater when the carbon cup contained a body which was rapidly carried off I presume because in such cases, with the same potential, higher speeds were reached, and also because, per unit of time, more matter was projected that is, more particles would strike the glass.
Along them, as along pneumatic tubes, ships would travel at unthinkable speeds toward absolutely certain destinations. True, at times they could not be used because of the bulk of planets between starting-points and landing-stations. But with due attention to scheduling, it would be a simple matter indeed to arrange for something close to commuters' service between star-clusters.
But that speed could not be held for long. The sun was above the horizon now, and the long straight column of smoke that we left behind us glowed rosy-red; and all the autumn foliage of the woods was ablaze with color and light. But as the sunlight struck the rails the frost began to melt; and a wet rail is fatal to the highest speeds.
Nothing more warlike is in sight than a row of brass shields, destined for ornament, not for battle. Dark shadows chase one another by the flickering light among copper kettles of ruddy glow, old-fashioned samovars, and massive andirons of tarnished brass. The bargaining goes on. Overhead the nineteenth century speeds by with rattle and roar; in here linger the shadows of the centuries long dead.
But he put up his hand to stop me. "It slightly deteriorates, I say, with the passage of time." He paused a moment impressively. "No one has hitherto discovered any system which will accurately record the speed of a vehicle or of any rotary movement and register it at the lowest as at the highest speeds."
Then, even as a swift-winged hawk speeds forth to fly, poised high above a tall sheer rock, and swoops to chase some other bird across the plain, even so Poseidon sped from them, the Shaker of the world.
He mounts; the animal speeds away to the cliff, but does not pause at the brink this time: with a sickening jump and fall he goes into the sea. Spurning the wave-tops in his flight he makes a circuit of the burning ship, and in the hellish light, that fills the air and penetrates to the ocean bottom, the pirate sees again his victims looking up with smiles and arms spread to embrace him.
Again he started, the brake bands squeaking and protesting, the machine sloughing dangerously as now and again its sheer weight forced it forward at dangerous speeds until lesser levels could be reached and the hold of the brake bands accomplish their purpose again. Down and down, the miles slipping away with far greater speed than even Barry realized, until at last
It ran up with his weight, tight as a bow-string, and swift as the arrow it speeds. He fell for five-and-thirty feet. There was a sudden jerk, a terrific convulsion of the limbs; and there he hung, with the open knife clenched in his stiffening hand. The old chimney quivered with the shock, but stood it bravely.
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