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It was now very dark; but there was still oil for bull's-eye and lantern, and I lit them. I forgot nothing. I rolled driver and stoker the guard was absent one to the platform, one upon the rails: and I took their place there. At about 8.30 I ran out from Dover, my throttle-valve pealing high a long falsetto through the bleak and desolate night. My aim was London.
Morse, with his first message, brought by his servant, the lightning; Fulton, in that long-drawn century of suspense, when he placed his hand upon the throttle-valve and lo, the steamboat moved; Jenner, when his patient with the cow's virus in his blood, walked through the smallpox hospitals unscathed; Howe, when the idea shot through his brain that for a hundred and twenty generations the eye had been bored through the wrong end of the needle; the nameless lord of art who laid down his chisel in some old age that is forgotten, now, and gloated upon the finished Laocoon; Daguerre, when he commanded the sun, riding in the zenith, to print the landscape upon his insignificant silvered plate, and he obeyed; Columbus, in the Pinta's shrouds, when he swung his hat above a fabled sea and gazed abroad upon an unknown world!
The principle, "an old one of my own," as Watt says, is in great part acted upon to-day. So numerous were the improvements made by Watt at various periods, which greatly increased the utility of his engine, it would be in vain to attempt a detailed recital of his endless contrivances, but we may mention as highly important, the throttle-valve, the governor, the steam-gauge and the indicator.
Muirhead says: The throttle-valve is worked directly by the engineer to start or stop the engine, and also to regulate the supply of steam.
The great parabolic head-light illuminated the track a long way in advance, all behind it being of course in darkness. Suddenly Sinclair cried out: "The fools have a light there, as I am a living man; and there is a little red one near us. What can that be? All ready, Jack! By heaven! they have taken up two rails. Now hold on, all! The engine-driver shut his throttle-valve with a jerk.
Morse, with his first message, brought by his servant, the lightning; Fulton, in that long-drawn century of suspense, when he placed his hand upon the throttle-valve and lo, the steamboat moved; Jenner, when his patient with the cow's virus in his blood, walked through the smallpox hospitals unscathed; Howe, when the idea shot through his brain that for a hundred and twenty generations the eye had been bored through the wrong end of the needle; the nameless lord of art who laid down his chisel in some old age that is forgotten, now, and gloated upon the finished Laocoon; Daguerre, when he commanded the sun, riding in the zenith, to print the landscape upon his insignificant silvered plate, and he obeyed; Columbus, in the Pinta's shrouds, when he swung his hat above a fabled sea and gazed abroad upon an unknown world!
The steam, after being used, is admitted to a coil of pipes cooled by the breeze caused by the motion of the vehicle, and so condensed into water and returned to the tank. The engine is started, stopped, slowed, and sped by the cutting off or admission of the steam through the throttle-valve.
I notice that he is taking on a certain amount of true culture. He is broadening. Jimmie is beginning to let his emotions out; however, very gradually, with a firm, nervous hand on the throttle-valve, with the sensitive American's fear of ridicule as his steam-gauge. I watched Jimmie as he first saw the Achensee.
The great parabolic head-light illuminated the track a long way in advance, all behind it being of course in darkness. Suddenly Sinclair cried out: "The fools have a light there, as I am a living man; and there is a little red one near us. What can that be? All ready. Jack! By heavens! they have taken up two rails. Now, hold on, all! The engine-driver shut his throttle-valve with a jerk.
We have no boiler, no feed pump, no stuffing-boxes to attend to no water-gauges, pressure-gauges, safety-valve, or throttle-valve to be looked after; the governor is of a very simple construction; and the slide-valves may be removed and replaced in a few minutes. An occasional cleaning out of the cylinder at considerable intervals is all the supervision that the engine requires.
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