. History of the Panama canal; its construction and builders . 1. Lidgerwood cableway conveyors at work on side wall monolith, Gatun upper lock; cable rope furnished by A. Leschen & Sons Rope Co., St. Louis. 2. Lidgerwood unloaders sweeping the cars with Leschens Hercules wire rope. (Supplied by the Lidgerwood Manufacturing Company, New York.) THE DREDGE COROZAL 357 on dredging work on the Clyde. Thesewere the first self-propelling vessels em-ployed for transporting and depositingdredgings in deep water. The idea of em-ploying steam power for this purpose was,at the time, looked upon with grav
. History of the Panama canal; its construction and builders . 1. Lidgerwood cableway conveyors at work on side wall monolith, Gatun upper lock; cable rope furnished by A. Leschen & Sons Rope Co., St. Louis. 2. Lidgerwood unloaders sweeping the cars with Leschens Hercules wire rope. (Supplied by the Lidgerwood Manufacturing Company, New York.) THE DREDGE COROZAL 357 on dredging work on the Clyde. Thesewere the first self-propelling vessels em-ployed for transporting and depositingdredgings in deep water. The idea of em-ploying steam power for this purpose was,at the time, looked upon with grave doubts,some regarding it as a piece of folly, and,as was customary in those days, it met withmuch opposition. Time and actual accomplishment haveamply demonstrated on the Clyde, Thames,and Mersey, and on the Panama Canal,that the substitution of steam hoppersfor tugs, with their string of punts or scows,was a step in the right direction. Thisintroduction of steam hoppers broughtabout other improvements. Among othersuggestions was one that if it were po
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