Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 164
139 the wing, and by the rotation of the bones of the arm, fore-arm, and hand, upon their long axes. The reaction of theair also assists in the production of the oblique surfaces. That the wing twists upon itself structurally, not only inthe insectj but also in the bat and bird, any one may… … Fig. 65. Fig. 66. Fig. 64 shows left wing {a, l) of wasp in the act of twisting upon itself, the tipof the wing describing a figiire-of-8 track (a, c, 5). From nature.—Or igino.l. Fios. 65 and 66 show right wing of blue-hottle fly rotating on its anteriormargin, and twisting to form double or…
Animal locomotion · Aeronautics
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