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
the arms, were rivetted to the paddles, by which means they were readilyadjusted and secured at uniform distances from the axes. All were of thesame area—49 inches. To test the qualities of the boat, and get her into working trim, blades,7 inches square, fig. 3, were fixed on the arms of both…
United States. Patent Office · Patents · Inventions · Aids to navigation
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![An illustration from Perspectiva; hierinnen auffs kürtzte beschrieben, mit Exempeln eröffnet vnd an Tag gegeben wird, ein newer besonder kurtzer, doch gerechter vnnd sehr leichter Weg, wie allerley Ding, es seyen Corpora, Gebew, oder was möglich zuerdencken vnd in Grund zulegen ist, verruckt oder vnuerruckt, frener in die Perspectyf gebracht werden mag, on einige vergebliche Linie, riss vñ Puncten, [et]c. dergleichen Weg bisshero noch nit bekant gewesen (1571)](https://img.insideoutlibrary.com/img/200/ia-perspectivahieri00lenc-51-26.webp)
![An illustration from The English pilot. [cartographic material] : The fourth book. Describing The West-India navigation, from Hudson's Bay to the River Amazones. Particularly delineating The Sea Coasts, Capes, Headlands, Rivers, Bays, Roads, Havens, Harbours, Streights, Rocks, Sands, Shoals, Banks, Depths of Water, and Anchorage, with all the Islands therein, as Jamaica, Cuba, Hispaniola, Barbadoes, Antigua, Bermudas, Porto Rico, and the rest of the Caribbee and Bahama Islands. Also, A new Description of Newfoundland, New England, New York, East and West New- Jersey, Dellawar Bay, Virginia, Maryland, Carolina. showing, The Courses and Distances from one Place to another; the Ebbing and Flowing of the Sea, the Setting of the Tides and Currents, &c. With many other Things necessary to be known in Navigation. (1775)](https://img.insideoutlibrary.com/img/200/ia-englishpilotcart00thor-104-410.webp)
