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Updated: May 28, 2025
Necessarily they had to circle off away from the blaze to get to the necessary height, but Tom soon brought the airship around again and headed for the black pall of smoke which marked the place of the blazing barn. "We'll all three send down bombs at the same time," Tom told his friends, as they darted forward. "When I give the word press the levers, and the chemical containers will drop.
Minford had expressed of him; but his eyes were irresistibly attracted to the mysterious spot, and obtained a clearer glimpse, through an open space between the two screens, of a something composed of cogwheels, springs, bands, and levers.
Smoke loaded with carbonic acid and watery vapor. Incombustible ashes. Motive force of simple alternate push and pull in the piston, which, acting through wheels, bands, and levers, does work of endless variety. A deficiency of fuel, water, or air, disturbs, then stops the motion. The Animal Body in Life takes: 1. Food: vegetables and flesh, both combustible. Water for circulation.
Likewise, in the mining field, where shaking screens, to name only one of the many mechanical units necessary in mining operations, are an essential factor units operated with pulleys and belts and cams and levers all the province of the mechanical engineer the mechanical man finds his uses.
He turned several levers. There was a hissing sound as the gas rushed from the container, and the ship began to settle down. "What's th' matter? Are we goin' t' hit th' earth?" yelled Washington, rushing from the engine room. "Keep quiet," ordered the professor. "We are only going down, that's all." "But good land! Perfesser!" exclaimed the colored man. "The ocean's right under us!
Levers of the first class are those in which the fulcrum is between the power and the weight. The crowbar, when used to lift a weight at one end by the application of power at the other, with a block as a fulcrum, is a familiar example of this class. There are several examples of this in the human body. The head supported on the atlas is one.
Though I had put no coin into the machine, I saw the levers and gears start to move again, the door of that pulmonary cavity was closed and the brown fingers jerked their way forward. "Not only can write, but is anxious to do so," I remarked, as I extended the pencil and laid the paper on the chessboard.
He put everything in order, mended his kaftan, cleaned and polished his brass plate until it fairly shone. Vasily also worked hard. The Chief arrived on a trolley, four men working the handles and the levers making the six wheels hum. The trolley travelled at twenty versts an hour, but the wheels squeaked. It reached Semyon's hut, and he ran out and reported in soldierly fashion.
For a bare fraction of a second the two men stared at each other, then, instinctively, the warden's right hand moved toward the open drawer of his desk where a revolver lay, and his left toward several electrically connected levers. The intruder noted both gestures, and, unarmed himself, stood silent. The warden was first to speak. "Well, what is it?"
Connected with the rocking plate R, and on opposite sides of its centre, the same as the exhaust valve connections, there are two levers, vibrating on a centre c, of which one only is shown, as it covers the other; to the upper ends of these levers pawls are attached, one end of which rests on the stems or rods connected with the handles s, s', of the steam valves; on these stems there are notches against which the pawls strike, and as the levers vibrate inward they push back the stems and thereby open the valves, and this continues for the whole length of the inward motion of the levers, or till the outer extremities of the pawls come in contact with the end of the short lever l, which, pushing down the outer end of the pawls, relieves the stems at the other ends, and the valve stem returns to its place through the force of springs attached to the outer extremities of the valve stems a, are cylindrical guides to the valve stems, at the inner extremities of which are air cushions.
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