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technology from "On submarine foundations, particularly the screw-pile...
This image has been taken from scan 000018 from "On submarine foundations, particularly the screw-pile and moorings, by A. Mitchell. And an account of the Maplin Sand lighthouse, by J. B. Redman. With abstracts... More
Screw-Pile river and Harbor light-house
Offshore hlightouse on stilts, with beacon in roof. Above print: U.S. Light-House Establishment, 1876. Illus. in: Annual Report of the U.S. Light-House Board, 1876, frontispiece.