. Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics. Animal locomotion; Aeronautics. PROGRESSION ON THE LAND. Walking of the Quadruped, Biped^ etc.—As the earth, because of its solidity, will bear any amount of pressure to which it may be subjected, the size, shape, and weight of animals destined to traverse its surface are matters of little or no consequence. As, moreover, the surface trod upon is rigid or unyielding, the extremities of quadrupeds are, as a rule, terminated by small feet. Eig. 18 (contrast with fig. 17).. Fig. 18.—Chillingham Bull (Bos Sc
. Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics. Animal locomotion; Aeronautics. PROGRESSION ON THE LAND. Walking of the Quadruped, Biped^ etc.—As the earth, because of its solidity, will bear any amount of pressure to which it may be subjected, the size, shape, and weight of animals destined to traverse its surface are matters of little or no consequence. As, moreover, the surface trod upon is rigid or unyielding, the extremities of quadrupeds are, as a rule, terminated by small feet. Eig. 18 (contrast with fig. 17).. Fig. 18.—Chillingham Bull (Bos Scoticus). Shows ppwerfnl heavy body, and the small extremities adapted for land transit. Also the figure-of-8 move- ments made by the feet and limbs in walking and running, ii, t Curves made by right and left anterior extremities, r, s Curves made by right and left posterior extremities. The right fore and the left hind f(^ot move together to form the waved line (s, v) ; the left fore and the right hind foot move together to form the waved line (r, t). The curves formed by the anterior (U y) and posterior (r, s) extremities form ellipses. Compare with fig. 19, p. S9.—Original. In this there is a double purpose—the limited area pre- sented to the ground affording the animal sufficient support and leverage, and enabling it to disentangle its feet Avith tlie. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pettigrew, James Bell, 1834-1908. New York, D. Appleton & company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectaeronau, bookyear1874
