. Animal mechanism: a treatise on terrestrial and aërial locomotion. Animal locomotion; Flight. FLIGHT OF INSECTS. 187 loops usually predominates over the other; it is generally the lower one which increases while the upper diminishes. Indeed, by a still greater opening, the hgure is occasionally trans- formed into an irregular ellipse, at the extremity of which we can recognise a vestige of the second Fig. 71.—Appearance of a wasp, the extremity of each of whose larger wings has been gilded. The insect is supposed to be placed in a sun- beam. We thought that we had been the first to po
. Animal mechanism: a treatise on terrestrial and aërial locomotion. Animal locomotion; Flight. FLIGHT OF INSECTS. 187 loops usually predominates over the other; it is generally the lower one which increases while the upper diminishes. Indeed, by a still greater opening, the hgure is occasionally trans- formed into an irregular ellipse, at the extremity of which we can recognise a vestige of the second Fig. 71.—Appearance of a wasp, the extremity of each of whose larger wings has been gilded. The insect is supposed to be placed in a sun- beam. We thought that we had been the first to point out the form of the trajectory of the wing of the insect, but Dr. J. B. Petti- grew, an English author, informs us that he had already mentioned this figure of 8 appearance described by the wing, and had represented it in the plates of his work.* It will be seen presently that, notwithstanding this apparent agree- ment, our theory and that of Dr. Pettigrew differ materially from each other. Changes of the plane of the wing,—The luminous appearance given during flight by the gilded wing of an insect, shows * On the Mechanical AppHances by which Flight is Maintained in the Animal Kingdom. Transact, of Linnean Society, 1867, p. 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
