ity of an odor mixture is never yet been satisfactorily demonstrated. On the angle of 45° and runs from the base of the posts to the never stronger than that of its components. The other hand, it has been shown that odor mixtures (of rear of one of the treads of the lower steps. The mir- author has… … THE SPIDER AND THE FLY TRICK. so adjusted in the ma- represents the steps ; 2, chine that a bar catch- the mirror ; 3, the web ; es its bristles or wires momentarily, and when these are simple odors, thus resembling the color mixtures rather and 4, the lady. This trick requires the most careful…
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![An illustration from Episodes of insect life / by Acheta Domestica, [pseud.] ;edited and revised by J.G. Wood. (1879)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b28066340-275-1.webp)
