HOW FAR CAN A FLY FLY?
The disifuioe which a fly can journey, and the direction in which his flight islikely'io lie, arc questions important enrr,;c:h to havo been recently discussed before the Cambridge Philosophical Society by Dr K. Hindle. The relations of this pestiferous little insect to the public health arc so important, indeed, that tho doctor has devoted profound study to its habits. Ho recently secured some 20,C00 of tho insects, and, after dusting them with colored chalk powder for the purpose of identification, set them free. In the meanwhile he had arranged for many stations at varying distances, whero the flies might be trapped. A good many of thore which he had marked were so captured. The Hies wero released under ordinary weather conditions, and without any efforts toward influencing their flight, the. purpose being, of course, to ascertain their normal habits. The experiment showed that these insects, in migrating, fly agaiust the wind,- or, at least, obliquely thereto. Tho longest, flight accomplished was 700 meters—about 2,296 ft. The. course of this fly was over open country and comparatively free, from trees. The greatest, distance traversed by any in a city was approximately 1,400 ft. Tha figures seem to indicate that the ily may travel about half a mile in ordinary circumstances, although when" conditions 'aro unusual, as in a hi'ih wind, or when impelled by hunger, its flight is known to bo much longer.
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HOW FAR CAN A FLY FLY?, Evening Star, Issue 15677, 16 December 1914
HOW FAR CAN A FLY FLY? Evening Star, Issue 15677, 16 December 1914
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