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Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress (1901)

Boyd, James Penny, 1836-1910 · Philadelphia, A. J. Holman & co · leaf 380

An illustration from Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress, 1901, leaf 380
y swing-ing the draw to a close fit with the abutments. The desired result wasaccomplished by placing at each end of the draw a very short U-shapedstructure, having the same cross section as the cross section of the trough,and having beveled ends fitting corresponding bevels on the ends of… … 354 TRIUMPHS AND WONDERS OF THE XIXth CENTURY are raised, and the draw is then free to turn. The wedges are operated byhydraulic rams. Chicago Drainage Canal. — It will probably be a surprise to manypeople to learn that this drainage canal lias a greater cross sectionthroughout the earth-work…

Progress · Inventions

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