Animal Locomotion; or, walking, swimming, and flying / With a dissertation on aëronautics

The book analyzes mechanical principles governing walking, swimming, and flying, linking anatomy, muscle action, lever mechanics, and fluid resistance to explain animal movement. It distinguishes passive structures—bones, joints, ligaments—and active elements—muscular cycles, spiral fiber arrangements—and describes recurring figure-of-8 and helical trajectories traced by limbs, tails, fins, and wings. Comparative chapters relate terrestrial, aquatic, and aerial progression through centres of gravity, types of levers, and wave-like muscular propagation. The work also discusses artificial analogues and aeronautical implications and supports its arguments with many diagrams, experimental observations, and a concise history of prior theories.