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 629
oper, Ericson, Smith, and a host of others,have the same sectorial form. Their resem-blance to the tails of slow-swimming fish isobvious to every eye. Would it not be betterto make each more like the lobe of the mostagile and swift, as at B, B ? A. rectangularblade—not unlike one belonging to a… … I I 9- (■r/////^f^ff ,///// ./•// • ■ / ///■///*.> !l
United States. Patent Office · Patents · Inventions · Aids to navigation
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-355-211.webp)
