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At sight of the man upon the step the new-comer stopped; then, as if decided, she walked on very lightly as she drew near the sleeper. Passing round him, she went to the gate, slid the wicket latch easily to one side, and put her hand in the opening. One of the broad boards in the left valve swung ajar without noise.
The Lemichel Syphon is a wonderful, yet most simple application of natural force. The inlet leg of the syphon is larger in diameter than the outlet leg, and is provided at the bottom with a valve or "clack." The outlet leg has a tap at its base. At the apex are two chambers, with an intermediary valve, regulated by a counterpoise weighted lever.
The "Curb" market and certain prominent unaffiliated houses dealing in these securities had loyally played their part in suspending dealings, but symptoms began to show themselves of possible revolt, and the Committee of Five set to work to find a safety valve for this department also.
The valve spindle was hollow, and a prolongation of the screw passed up through it, and was armed on the top with a small wheel, by means of which the plates might be adjusted while the engine was at work. In 1839 I fitted an expansion valve in a steam vessel, consisting of two plates, connected by a rod, and moved by tappets up against the steam edges of the valve.
In this type the inlet and exhaust valves are both located in the cylinder head, and mechanically operated by push-rods and rockers. Pipes are carried from the crank case to the inlet valve casings to convey the mixture to the cylinders, a carburettor of the central needle type being used. The carburetted mixture is taken into the crank case chamber in a manner similar to that of the Gnome engine.
Knight! she burst out loudly and uncontrollably, as though Geraldine's magic formula had loosened a valve capable of withstanding enormous strains. Then she smiled, laughed, and sniggered: not because she imagined that she had achieved humour, but because that was her way of making herself agreeable.
Then the young Crania adhered to the bared shell, grew and perished in its turn; after which, the upper valve was separated from the lower, before the Echinus became enveloped in chalky mud." A specimen in the Museum of Practical Geology, in London, still further prolongs the period which must have elapsed between the death of the sea-urchin, and its burial by the Globigerinae.
HOLLAND concludes that their production is a process incident, but not ancillary, to other important ends, especially connected with the vital functions of the trunk and the marvellous motive powers inherent to it; his conjecture is, that they are "a species of safety valve of the animal oeconomy," and that "they owe their development to the predominance of the senses of touch and smell, conjointly with the muscular motions of which the exercise of these is accompanied."
It utilises the heat of the products of combustion after they have passed through the boiler proper and greatly reduces their temperature, while the feed-water enters the boiler at a temperature of about 250 F. A forced circulation is maintained in the boiler, the feed-water entering through a spring valve, the spring valve being adjusted in such a manner that the pressure on the water is always 30 lbs. per square inch in excess of the boiler pressure.
The river is three-quarters of a mile wide, and could not be crossed on foot; nor could the cable be repaired. Edison at once suggested using the steam whistle of the locomotive, and by manipulating the valve conversed the short and long outbursts of shrill sound into the Morse code.
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