Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 185
ip may travelrapidly in the direction of the stern of the vessel, and yet becarried forward in space,—the ship sailing much quicker thanhe can walk. While the wing is descending, it is rotatingupon its root as a centre (short axis). It is also, and this isa most important point, rotating upon its… … Fig. 85. In flexion, as a rule, the under surface of the wing (fig. 84a) is arranged in the same plane Mnth the body, both being ina line with or making a slight angle with the horizon {x x)} ^ It happens occasionally in insects that the posterior margin of the wingis on a higher level than the…
Animal locomotion · Aeronautics
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