casionally shipped upwards, as the screw andshaft -ink into the ground. When the number of men employed can no longer force the screw round,the levers are removed, and the shaft drawn out of the ground, leaving themooring firmly imbedded with the chain att.n bed to it ; a buoy being shackledto the… … The principle upon which this bridge is formed, is, that at every pointof support its stability is maintained by four forces, viz.—the two barsradiating from the centre of each pier, and the frame of the bridge itself,which frame being connected with the piers in such way as to retainonly a…
Civil engineering · Architecture
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
