Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 122
ided with itsswimming membrane ; the membrane being closed wlien tiie foot is flexed,and expanded when the foot is extended. Compare with foot of swan (fig.48), where the swimming membrane is continued from the one toe to theother.—(After Dallas.) consists of three swimming toes, each of which is… … Fig. 50.—Diagram representing the double Avave<l track described by the feetof swimming birds. Compare with figs. 18 and 19, pp. 3T and 39, and with32, li. {iS.—Original. In swimming birds, each foot describes one side of anellipse when it is extended and thrust from the body, theother side of…
Animal locomotion · Aeronautics
Internet Archive · Biodiversity Heritage Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Sketch of Prof. John Le Conte ; [and] Sensitive flames and sound-shadows (1889)](https://img.insideoutlibrary.com/img/200/ia-sketchofprofjohn00stevrich-28-5.webp)
