. Factory and industrial management . h the empty tumbler open enddownward. With a tube blow air into the lower tumbler until it al-most rises clear of the water. A second pair of tumblers similarlyarranged will represent the other section of the airlock. Connect theair spaces of the two bottom tumblers by means of a tube, and, thusbalanced upon the compressed air, both sets of tumblers rise or fall,and air is made to flow from one tumbler to the other through theconnecting tube or pipe. This principle has also been applied to dry docks for repairing ves-sels, and has many advantages over the
. Factory and industrial management . h the empty tumbler open enddownward. With a tube blow air into the lower tumbler until it al-most rises clear of the water. A second pair of tumblers similarlyarranged will represent the other section of the airlock. Connect theair spaces of the two bottom tumblers by means of a tube, and, thusbalanced upon the compressed air, both sets of tumblers rise or fall,and air is made to flow from one tumbler to the other through theconnecting tube or pipe. This principle has also been applied to dry docks for repairing ves-sels, and has many advantages over the ordinary type of off shoredocks now in use. But for compressed air, it would be almost, if not quite, impossi-ble to obtain suitable foundations for the mammoth sky-scrapingstructures which stand out so prominently in lower New York. Inthis foundation work, both for buildings and piers for bridges, cais-sons have to be sunk gradually, as the excavation progresses. Com-pressed air is used to keep the working chamber at the bottom from. FIG. 13. INTERIOR OF A CAISSON, 74 FEET BELOW WATER-LEVEL. THE USE OF COMPRESSED AIR. 667
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
