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SCALE

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Originally appearing in Volume V28, Page 498 of the 1911 Encyclopedia Britannica.
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SCALE 'M. up the curtains, and then lifting the hinged frames to a See also:

horizontal position under the overhead See also:bridge by means of chains worked by a winch on the bridge. This See also:system, which has been employed for the lowest See also:weir on the Moldau, and for a weir at the upper end of the See also:Danube See also:canal near See also:Vienna to shut out floods and floating See also:ice, as well as on the See also:Seine, possesses the merits of raising all the movable parts of the weir out of See also:water in See also:flood-See also:time, and rendering the working of the weir very safe and easy. On the other See also:hand, it involves the expense of a wide See also:foot-bridge for raising the frames, and wide and high See also:river piers, especially for the navigable passes where the bridge has to be raised high enough to afford the regulation headway for vessels at the highest navigable flood-level (fig. 7), so that its See also:adoption should be restricted to positions where the conditions are quite exceptional.

End of Article: SCALE

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