conomi-cally obtained by placing a number ofsmaller surfaces one above another. In-deed, flying-machines were built by Wen-ham on this principle, with appliancesfor the use of his own muscular power. Hedid not, however, accomplish actual flight,although valuable results were obtained asregards the… … *
World War, 1914-1918 · Aeronautics
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
