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Updated: June 7, 2025
It will be remembered that the miners first found the gold in flakes, then farther up in nuggets, then that the nuggets had to be pursued to pay-dirt beneath gravel and clay. This meant shafts, tunnels, hydraulic machinery, stamp-mills.
We soon saw the Stilton Cheese-like punch begin to sink slowly and quietly through the 5-inch thick cake of iron, as if it had been stiff clay. The only sound heard was when the punched-out mass dropped into the recess of the coupling below. Such a demonstration of tranquil but almost resistless power of a hydraulic press had never, so far as we were aware, been seen before.
Besides the invention of improved machine-tools for the manufacture of locks, Maudslay was of further service to Bramah in applying the expedient to his famous Hydraulic Press, without which it would probably have remained an impracticable though a highly ingenious machine.
A cab had crossed a sidewalk and crashed into a plate-glass window. Its hydraulic brakes had failed. The trouble was a clean saw-cut in a pressure-line. Fitzgerald went to find out about it. The cab driver bitterly refused to answer any questions. He wouldn't even admit that he was not insured by Big Jake against such accidents. Fitzgerald stormed.
The tank whence the water is taken is 426 feet higher than the top of the shaft, therefore the vertical pressure upon the hydraulic pump at the 3,000 foot level is 3,426 feet. The pressure pipe is of ordinary galvanized iron where it receives the water at the tank, but gradually grows thicker and stronger, and at the 3,000 level it is constructed of cast iron, and is 2½ inches in thickness.
True, the percentage of energy received by convection was small compared to that received by radiation; but it was also wildly variable. As a biological cultural medium, the hydraulic system provided a basis for both air restoration and food supplies.
The area of the cross section shown on the diagram, which is at one of the deepest points, is 8,972 square feet, and the height from foundation to flood level is 129 ft., the breadth at the base being 117 ft. 9 in. Its capacity is 364,000,000 gallons and the area 279 acres. The height is 78 ft. and width at crest 8 ft. 6 in., and is built of masonry in hydraulic mortar.
Boucherie is generally applied to the process, which he invented and extensively applied, of preparing wood by forcing a solution longitudinally through the pores of the wood by means of hydraulic pressure.
The admirable hydraulic cement is here and there made to take the place of broken corners, and flaws have been remedied by carefully letting in small cubes of sound stone. There are also cramp-holes for metal which, of course, has been carried off by the Bedawin: the rusty stains suggest iron.
The immense hundred-ton guns and the crank-shafts of transatlantic steamers are forged by hydraulic pressure, and the worker has but to turn a tap to give shape to the immense mass of steel, which makes a far more homogeneous metal, without crack or flaw, of the blooms, whatever be their thickness.
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