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
y slowly, after which they are simultaneouslyand rapidly extended. The swimming of the frog conveys anidea of the movement.^ In ordinary swimming, when theanterior and posterior extremities are simultaneously flexed,and afterwards simultaneously extended, the hands and feetdescribe four ellipses j… … Fig. 3& Fig. 39. Fig. 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 legs are drawn towards the body, the arms describethe outer sides of the ellipses {b…
Animal locomotion · Aeronautics
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