"Artificial flight may be defined as that form of aviation in which a man flies at will in any direction by means of an apparatus attached to his body, the use of which requires personal skill. Artificial flight by a single individual is the proper beginning for all species of artificial flight, as the necessary conditions can most easily be fulfilled when man flies individually."

Source : "The Romance of Aeronautics". Book by Charles Cyril Turner, Ch. VII Lilienthal and Pilcher, 1912.

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