Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 253
As a consequence, the bird will be more vigorously depressedduring the ascent of the wing than it will be elevated duringits descent. That the mechanical wing referred to by Borelliand Marey is not a flying wing, but a mere propelling ap-paratus, seems evident to the latter, for he states that…
Animal locomotion · Physiology · Aeronautics
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