Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 172
rection of its length.The long and short axes render the movements of the wing-eccentric in character. In the wing of the bird the movementsof the primary or rowing feathers are also eccentric, the shaftof each feather being placed nearer the anterior than the pos-terior margin; an arrangement… … the short axis (root of wing) with a radius e f; c d represent-ing the long axis (anterior margin of wing) with a radius g p.Fig. 80 also shows that, in the wing of the bird, the indi-vidual, primary, secondary, and tertiary feathers have eachwhat is equivalent to a long and a short axis. Thus…
Animal locomotion · Physiology · Aeronautics
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