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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). House · Washington [D.C.] : Office of Printers to House of Reps. · leaf 606

An illustration from Report of the commissioner of patents, for the year 1849, 1850, leaf 606 — e made up of them. Nor does she ever unite thelevers that work them to their sides. The junction is invariably at an angle,cind the reason is apparent—that the largest surface may have the longestsw^eep. With this viev/, the bodies of fishes taper down to meet the blades; retain-ing only sufficient… … a, Striped bass,fe, Porgee,e, Sea bass,d, Black-fieh, «, Salmon,/,Cod,Of, Mackerel,A, Flounder. knowledge that, till then, I was ignorant of the exact forms of these naturalpropellers, although most ofthem had passed under my ©bservation on athousand occasions. Too many of us spend no more thought…

United States. Patent Office · Patents · Inventions · Aids to navigation

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