Annual report of the Board of Regents of the Smithsonian Institution . Figure 21.—Curves described by the tip of a blowflys wing in flight. Tracingsmade by the tip of the wing of a fly held stationary with the head directed towardthe movement of the recording surface. (From Ritter, 1911) narrow wings; in slower-flying insects with broad wings, such as thegrasshoppers and butterflies, the up-and-down movement is theprincipal one. That the movements of animals, including the flight of insects,could be studied from series of moving-picture photographs wasfirst demonstrated by Marey (1901). With m
Annual report of the Board of Regents of the Smithsonian Institution . Figure 21.—Curves described by the tip of a blowflys wing in flight. Tracingsmade by the tip of the wing of a fly held stationary with the head directed towardthe movement of the recording surface. (From Ritter, 1911) narrow wings; in slower-flying insects with broad wings, such as thegrasshoppers and butterflies, the up-and-down movement is theprincipal one. That the movements of animals, including the flight of insects,could be studied from series of moving-picture photographs wasfirst demonstrated by Marey (1901). With more improved methods,von Lendenfeld (1903), Bull (1904), and Voss (1914) have obtainedcinematographic records giving a convincing demonstration of thenature of the insect wing movements in flight. Voss made calula-tions from his serial pictures of the number of wing strokes a second inmany species of insects. However, much of interest might yet bedone by this method of research. The rapidity of the wing movements varies greatly in differentinsects. The first state
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
