Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 121
rotated or tilted to a very slightextent, the increase and diminution of surface being securedby the opening and closing of the membranous expansion orweb between the toes. In this latter respect they bear a cer-tain analogy to the feet of the seal, the toes of which, as hasbeen explained, spread… … Fio. 48.—Swan, in the act of swimming, the right foot being fully expanded,and about to give the effective stroke, which is delivered outwards, down-wards, and backwards, as represented at. r of fig. 50; the left foot being closed,and about to make the itturn stioke, which is delivered in an…
Animal locomotion · Aeronautics
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