Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 159
d, can consequently only determine the minimum of wing for elevating the maximum of weight- -flight being attainable within a comparatively wide range. Wings, their Form, etc.: all Wings Screws, structurally andfunctionally.—Wings vary considerably as to their generalcontour; some being falcated or… … Fig. 61.—Eight wing of the Kestrel, drawn from the specimen, while beingheld against the light. Shows how the primary (b), secondary (a), and ter-tiary (c) feathers overlap and buttress or support each other in every direc-tion. Each set of feathers has its coverts and subcoverts, the wing…
Animal locomotion · Physiology · Aeronautics
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