Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 133
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, asa reference to fig. 54 will show. PROGRESSION IN OR THROUGH THE AIR. 109 In this figure (5 4) the…
Animal locomotion · Aeronautics
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