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 canal near Vienna to shut out floods and floating 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: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 adoption should be restricted to positions where the conditions are quite exceptional .
SCALE (1) A
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