Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 131
ped and then a waved track. Ihave shown how those insects, bats, and birds which flaptheir wings in a more or less vertical direction evolve tractileor propelling power, and how this, operating on properlyconstructed inclined surfaces, results in flight. I wish nowto show that flight may also be… … Fig. 54. motion in a very oblique direction, and with immense energy.This form of flight differs in no respect from the other, unlessin the direction of the stroke, and can be readily imitated, as a reference to fig. 54 will show. PROGRESSION IX OR THROUGH THE AIR. 109 In this figure (54) the…
Animal locomotion · Physiology · Aeronautics
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