Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 166
below upwards, the posterioror thin margin describing a similar but opposite course fromabove downwards. These conditions, I need scarcely observe,are reversed during flexion. The movements of the marginsduring flexion and extension may be represented with a con-siderable degree of accuracy by a… … Fig. 69. Fig. 70. FiG8. 6T, 68, 69, and 70, show the area mapped out by the left wing of thewasp when the insect is fixed and the wing made to vibrate. These figuresIllustrate the various angles made by the wing as it hastens to and fro, howthe wing reverses and reciprocates, and how it twists upon…
Animal locomotion · Aeronautics
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-45-6.webp)
