Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. . 76 TRIUMPHS AND WONDERS OF THE XIX™ CENTURY rock, and when the skip is in position a man pulls a lever, allowing the oreto run into it. Another pull closes the chute, a button is touched whichrings a bell in the engine-room, and the skip starts up the shaft. At the topit dumps itself and returns
Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. . 76 TRIUMPHS AND WONDERS OF THE XIX™ CENTURY rock, and when the skip is in position a man pulls a lever, allowing the oreto run into it. Another pull closes the chute, a button is touched whichrings a bell in the engine-room, and the skip starts up the shaft. At the topit dumps itself and returns to be filled again. In the mean time the otherskip has been filled and is going up while the first is coming down. Withthese two skips, making ninety-two trips an hour, over four thousand tons ofrock have been hoisted in less than twelve hours, from a depth of 1250 handle these enormous quantities tremendous hoisting engines areused. At the Calumet and Hecla mines is a pair of quadruple expansionengines which will lift cages, carrying six tons of ore. a mile in a minute anda half. The Modoc hoist, built for the Anaconda Mining Company ofButte, Montana, is the largest hoist in the world. It is a double compoundbeam engine, and is designed to be used in sinking to a depth of 6000 INCiEUSOLL-SEKIiKANT STEAM-DRIVEN AIII COMPRESSOR. This machine weighs four hundred tons, and has seven separate subordinateengines for use in operating it. Think of it! An engine so ponderous thatsmaller engines are necessary to apply the clutches that set the reels inmotion; other engines set the brakes, and another reverses the action, ifneed be. All these are controlled by levers operated from the engineersplatform, the runner having one foot and seven hand levers to these there are two indicator discs, directly in front, requiring con-stant attention, for these show the exact position of the cage in the such wonderful skill have the runners in the control o
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Keywords: ., bookcentury1800, bookdecade1890, bookidtri, booksubjectinventions
