How It Flies or, THE CONQUEST OF THE AIR The Story of Man’s Endeavors to Fly and of the Inventions by which He Has Succeeded By RICHARD FERRIS, B.S., C.E. Illustrated by Over One Hundred and Fifty Half-tones and Line Drawings, Showing the Stages of Development from the Earliest Balloon to the Latest Monoplane and Biplane New York THOMAS NELSON AND SONS 381-385 Fourth Avenue

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