Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 119
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… … FlG 48.-Swan, in the act of swimming, the right foot being fully expanded,md about to give the effective stroke, which is delivered outwards, down-i mis I ml backwards, as represented at r of fig. 50; the left foot being elosed,i 1 • boot to make the return stroke, which is delivered in an inward,…
Animal locomotion · Physiology · Aeronautics
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from A Dictionary of science, literature, and art [electronic resource]: comprising the history, description, and scientific principles of every branch of human knowledge; with the derivation and definition of all the terms in general use (1844)](https://img.insideoutlibrary.com/img/200/ia-62523189.5956.emory.edu-121-23.webp)
