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 623
ns. Their movements in the air resemblethose of butterflies, and, although quick in changing their direction of flight,they cannot be classed among swift soarers. Both they and lepidopters illus-tiate the fact that speed does not depend upon a large expanse of wing, somuch as uponybrm. It is this… … Carolina bats wing, half the natural size. Frugality in outlay of material, and consequently of power, is seen in everypiece of mechanism turned out of natures workshop. Sufficiency withoutsurplus—enough and not an atom over—are proverbs with her. An exampleworth mentioning occurs in bats. In…
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