Travels in space; a history of aerial navigation (1902)
Valentine, E. Seton, Tomlinson, F. L. · London Hurst and Blackett · leaf 194
ratus con-sisting of two pairs of wings, actuated by the handsand feet together in such a manner as to impart a A HISTORY OF AERIAL NAVIGATION. 175 movement similar to that of birds. He had previouslysucceeded in raising himself from the ground, but ofthe projected machine nothing more was heard.… … DE GROOF A\D HIS FI.YIKG MACHINE. parts, the propelling screws being in the middle and atthe side. In 1865 there came to Paris a young Belgian shoe-maker named de Groof, who was firmly possessed ofthe idea that he had invented a machine which wouldsafely navigate the atmosphere. But the aviators…
Aeronautics
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