Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 72
a firm basis of support. 2 In this order there are certain birds—the sparrows and thrushes, forexample—which advance by a series of vigorous leaps ; the leaps bing of auintermitting character. 3 The toes in the emu amount to three. PKOGKESSION ON THE LAND. 47 of movement for which this celebrated… … Fig. 24.—Skeleton of the Ostrich. Show« the T>o\verM legs, small feet, andrudimentary wings of the bird ; the obliquity at which the bones of the legsand wings are placed, and the comparatively small angles which any twobones make at thdr ])oint of junction, a Angle made by femur with ilium.b…
Animal locomotion · Aeronautics
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