Factory and industrial management . eam shovel doeson land; and indeed there are many points of similarity between thetwo, though the dredge is a more expensive machine and, on theother hand, capable of doing more work, the biggest one built to datehaving an 8-cubic yard dipper and costing complete $120,000, theboat itself being a very substantial affair. The question of boat hasrecently been the cause of a law suit to determine whether or not- theoperators, working in a harbor or river, should be classed as me-chanics or as seamen, on Government work, the point in disputebeing whether the 8-h


Factory and industrial management . eam shovel doeson land; and indeed there are many points of similarity between thetwo, though the dredge is a more expensive machine and, on theother hand, capable of doing more work, the biggest one built to datehaving an 8-cubic yard dipper and costing complete $120,000, theboat itself being a very substantial affair. The question of boat hasrecently been the cause of a law suit to determine whether or not- theoperators, working in a harbor or river, should be classed as me-chanics or as seamen, on Government work, the point in disputebeing whether the 8-hour labor statute should apply to them or not. The dipper dredge will rip out and lift or push aside huge bouldersthat the Hghter and cheaper orange peel or clam shell dredgeswould not touch. Dredges have been designed with lo-cubic yarddippers to be operated by 18 by 24-inch cylinder hoisting engines. While hoisting chains are still used for the smaller sizes, steelcables are much better for the bigger machines on account of being. 196 HOISTING AND HANDLING MACHINERY. 197


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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering