Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 255
ry, would fall ina line between h and /, probably in xh. It could not possiblybe otherwise; the wing described and figured by Borelli andMarey is in one piece, and made to vibrate vertically on eitherside of a given line. If, however, a wing in one piece iselevated and depressed in a strictly… … Fig. 114. Fig. 115. 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,…
Animal locomotion · Aeronautics
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