File:Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874) (18171309496).jpg

Title: Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics
Identifier: animallocomotio00pett (find matches)
Year: 1874 (1870s)
Authors: Pettigrew, James Bell, 1834-1908
Subjects: Animal locomotion; Aeronautics
Publisher: New York, D. Appleton & company
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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Text Appearing Before Image:
48 ANIMAL LOCOMOTION. extremities of the toes superiorly are armed with powerful short nails, the tips of which project inferiorly to protect the toes and confer elasticity when the foot is leaving the ground. The foot like the leg, is remarkable for its great strength. The legs of the ostrich are closely set, another feature of speed.^ The wings of the ostrich are in a very rudimentai y
Text Appearing After Image:
Fig. 25.—Ostnehes pursued by a Hunter. condition as compared, with the legs.^ All the bones are pre- sent, but they are so dwarfed that they are useless as organs of flight. The angles which the bones of the wing make with each other, are still less than the angles made by the bones ot* the leg. This is just what we would a priori expect, as the velocity with which wings are moved greatly exceeds that with which legs are moved. The bones of the wing of the ostrich are inclined towards each other at nearly right angles. 1 In dranght horses the legs are much wider apart than in racers; the legs of the deer being less widely set than those of the racer. 2 In the apteryx the wings are so very small that the bird is commonl;y spoken of as the wmgless bird."

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