Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 208
ted, is coveredby a continuous and more or less elastic membrane, it followsthat it cannot be opened up to admit of the air passingthrough it during the up stroke. Flight in the bat is thereforesecured by alternately diminishing and increasing the area ofthe wing during the up and down strokes—the… … a FIG. 102.—Shows the upward inclination of the body and the flexed conditionof the wings (a 6, ef; a V, ef ) in the flight of the kingfisher. The bodyand wings when taken together form a kite. Compare with fly. 59, p.126, where the wings are fully extended. Flexion of the Wing necessary to the…
Animal locomotion · Aeronautics
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