surfaces, and without taking the advantage ofthe more advantageous properties of curved ones. This power, I further already believed myself warranted bythese experiments in saying, could be obtained by the movementsof the air in the horizontal plane alone, even without the utiliza-tion of currents… … t, 1893, at the Smithsonian I(paper cups) registeting evety revolution.Abscissa; = Time*.Ordinates = Wind velocities in miles per hour. April, igio AIRCRAFT 77
Aeronautics
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![An illustration from Results of the magnetical and meteorological observations made at the Royal Observatory, Greenwich, in the year 1876[-82.] (1882)](https://img.insideoutlibrary.com/img/200/ia-resultsofmagneti06roya-96-2.webp)
