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Scientific American, Vol. 90, No. 23 (1904) (1904)
leaf 11
ngs ex- its entire surface. The adhesive substance is sweet- platform supported on a frame, in which the compen- tending lengthwise of the hub, either diametrically in sating drums are journaled, and from the latter, endless ened or otherwise made attractive to flies, which, when alinement, or at… … work independently. With one of the screens on the upper and lower © 1904 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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