Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 128
e body (b), or its representative(?r), slightly downwards. When the wing descends, as shownat p, the air (= fulcrum /) resists its downward passage,and forces the body (b), or its representative (w)f slightlyupwards. From this it follows, that when the wing rises the PROGRESSION IX OR THROUGH THE… … A / w I w Fig. 52. therefore, as well as the wing, rises and falls in flight. Whenthe wing descends it elevates the body, the wing being activeand the body passive; when the body descends it elevatesthe wing, the body being active and the wing passive. Theelevator muscles, and the reaction of the…
Animal locomotion · Physiology · Aeronautics
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