Animal locomotion : or, walking, swimming, and flying, with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King · leaf 246
65. He was well acquainted with the properties of the wedge, as applied to flight, and he was likewise cognisant of the flexible and elastic properties of the wing. To him is to be traced the purely mechanical theory of the wing’s action. He figured a bird with artificial wings, each wing… … The wings (b cfloe a), are represented as striking vertically downwards (g h). They remarkably accord with those de- scribed by Straus-Durckheim, Girard, and quite recently by Professor Marey.3 Borelli is of opinion that flight results from the application of an inclined plane, which beats the air,…
Aeronautics
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