Animal Mechanism



    IN his treatment of aerial locomotion, Prof. Marey has been even more successful than in his investigations with regard to progression on land. Nearly two centuries ago the general'?principles of this subject were very ably worked out by Borelli, who, after having shown that in the wing the anterior margin is rigid whilst the posterior portions are more and more flexible as they go backwards, inferred, as will be self-evident to all, that in the downward stroke of the flying bird the plane of the wing becomes directed downwards and backwards on account of the hinder margin yielding slightly to the resisting air. It not having struck him that the wing was elastic in its horizontal as well as its vertical direction, Borelli assumed that the stroke was strictly vertical.

    Animal Mechanism.

    By E. J. Marey. “The International Scientific Series.” (London: Henry S. King and Co., 1874.)

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    Animal Mechanism . Nature 10, 516–519 (1874) doi:10.1038/010516a0

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