Report of the Commissioner of Patents, for the year 1849 (1850)
United States. Patent Office, Ewbank, Thomas, 1792-1870, Lincoln, Abraham, 1809-1865. Improved method of lifting vessels over shoals, United States. Congress (31st, 1st session : 1849-1850). Senate · Washington [D.C.] : Office of Printers to the Senate · leaf 602
de being, as in all other instances, 13inches from the centre of the axis. Through repeated trials,they overcame the test paddles, fig. 3, and in a rather moremarked manner than fig. 3 surpassed fig. 4. They enteredthe water silentty, but observers on shore thought they raisedmore w^ater behind,… … [15] 5S8
United States. Patent Office · Patents · Inventions · Aids to navigation
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