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 624
eeably to the universal rule in air asin water propellers, increased speed invariably accompanying increased dip,and vice versa—a rule we have not attempted to follow in our steamers, andhence the comparative failure of our labored efforts. We cripple the flight ofdomestic and other birds by…
United States. Patent Office · Patents · Inventions · Aids to navigation
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