Thorpe, William Henry · London, E. & F.N. Spon, limited; New York, Spon & Chamberlain · leaf 168
10 OnPHAHDAT CBNTRE 6 6 ^t.e CAUSE j iMsn 3 ■*^ Pig. 87. engine, said to weigh 5 tons, had passed across the bridge insafety; but the author noticed that a coal wagon, which,with the horse, weighed about 50 cwt., when walked slowlyover set up much movement. This bridge had been in usenearly thirty… … Fig. 88. Though timber bridges cannot at the best be coasidefeddurable, yet, by attention to certain points in design aMconstruction, their length of life may be materially enhanced. 154 THE ANATOMY OF BRIDGEWORK. Every out across the grain may be considered an element ofweakness by exposing the…
Bridges
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