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Steam winch with steel wire. Steel wire for deepsea dredging was first used on the BLAKE. This innovation was the result of collaboration between Charles D. Sigsbee and Alexander Agassiz. It was Agassiz's idea to replace hemp rope with steel cable mining technology. In: Deep-Sea Sounding and Dredging, by Charles D. Sigsbee. 1880. Plate 30, p. 152. Call Number GC75 .S53.