Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 45
Fig. 2. … Fig. 3. P.AF=AV.BF + BF.—. INTRODUCTION. 21 In this outline of the theory of the lever, the forces havebeen considered as acting vertically, or parallel to the direc-tion of the force of gravity. Passive Organs of Locomotion. Bones.—The solid frame-work or skeleton of animals which supports and…
Animal locomotion · Aeronautics
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