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Scientific American, Vol. 35, No. 14 (September 1876) (1876)
leaf 7
ough the framework. This structure is shown in our engraving, Fig. 1. ading the port of New York, with her two outlets instead of ged rocks and boulders; but so soon as the surface had been one, would be at least doubled. Lieutenant Porter did not The coffer dam was pumped out about the raiddle of… … Fig. l.-COFFER DAM, MAIN SHAFT, AND ENTBANCE TO HEADINGS, HELL GATE, EAST RIVER. © 1876 SCIENTIFIC AMERICAN, INC.Valve · Improved · Exhibit · Center · Consists · Patents · Scientific American · Water · Square inch · Single copies · Hell gate · Cast Iron · Slide valve · White lead · Copy scientific · Dropping wheel · Rear ends
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