Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 67
en one part of abridge might be twice as strong as another. The bowstring wasadopted for the great span of 542^2 feet over the Ohio at Cin-cinnati built in 1888, and for the span of 5465/2 feet erected atLouisville in 1893. A bowstring 533 feet long, forming part ofthe Delaware river bridge of the… … Bowstring Bridge, Pennsylvania R. R., Philadelphia. If we take the design of an arch bridge and turn it upside downwe have a contour such as that of the Williamsburg SuspensionSuspension Bridges bridge, opened in 1903 between Brooklyn andand Continuous Manhattan, depicted on page 33. For the…
Inventions · Inventors
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