Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 264
d (Patagona gigas), as was pointed out by Darwin, canattain the same object by flapping its large wings with a veryslow and powerful movement. In the larger birds the move-ments are slowed in proportion to the size, and moreespecially in j)roportion to the length of the wing : the cranesand… … Fir,. 122. F]G. 122.—Elastic spiral wing, which twists and untwists during its action, toform a mobile ftd This wing is made to vibrate by steam by a direct piston action, and by a slight adjustment can be propelled vertically,horizontally, or at any degree of obliquity a. . Anterior margin of…
Animal locomotion · Physiology · Aeronautics
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