Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 130
the body (5), or its representative(w\ slightly downwards. When the wing descends, as shownat y, the air (= fulcrum f) resists its downward passage,and forces the body (&), or its representative {w), slightlyupwards. From this it follows, that when the wing rises the PKOGRESSION IN OE THROUGH… … 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 air on the…
Animal locomotion · Aeronautics
Internet Archive · Biodiversity Heritage Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-380-240.webp)
