. Animal mechanism: a treatise on terrestrial and aërial locomotion. Animal locomotion; Flight. FLIGHT OF INISECTS. 193 The graphic method also furnishes us with the proof of changes in the plane of the wing of the insect during the various instants of its revolutions. Fig. 79.—Tracings of a Wheatstone rod tuned to the f)ctave, furnished with the wing of a wasp, and arranged so as to register especially the upper loop of the 8. Fig. 80 shows the tracing furnished by a wing of a hum- ming-bird moth, arranged so as to touch the cylinder with its posterior edge. By bringing the insect not too nea
. Animal mechanism: a treatise on terrestrial and aërial locomotion. Animal locomotion; Flight. FLIGHT OF INISECTS. 193 The graphic method also furnishes us with the proof of changes in the plane of the wing of the insect during the various instants of its revolutions. Fig. 79.—Tracings of a Wheatstone rod tuned to the f)ctave, furnished with the wing of a wasp, and arranged so as to register especially the upper loop of the 8. Fig. 80 shows the tracing furnished by a wing of a hum- ming-bird moth, arranged so as to touch the cylinder with its posterior edge. By bringing the insect not too near, we can succeed in producing only intermittent contacts; these take place at the moment when the wing describes that part of the loops of the 8 whose convexity is tangential to the cylinder. The contacts which occupy the upper half of the figure alter- nate with those occupying the lower half. It is seen, besides, that it is not the same surface of the wing which produces these two kinds of friction. In fact, it is evident that the. t- JG. 80. -Tracings of the movements of the wing of a humming-bird moth (macroglossa) rubbing on the cylinder by its lower edge. marks of the upper half, each formed of a series of oblique strokes, are produced by the contact of a fringed border, while the contacts of the lower part are produced by another portion of the wing which presents a region unprovided with fringes, and leaves a whiter trace with boundaries better Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marey, Etienne-Jules, 1830-1904. New York, D. Appleton and co.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectflight, bookyear1874
