Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 106
dy slowly, after which they are simultaneouslyand rapidly extended. The swimming of the frog conveys anidea of the movement.1 In ordinary swimming, when theanterior and posterior extremities are simultaneously flexed,and afterwards simultaneously extended, the hands and feetdescribe four ellipses;… … Fig. 88. Pig. 40. Thus when the arms and legs are pushed away from thebody, the arms describe the inner sides of the ellipses (fig.38, a a), the legs describing the outer sides (c c). When thearms and le.gs are drawn towards the body, the arms describethe outer sides of the ellipses (b I), the legs…
Animal locomotion · Aeronautics
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