ture during a night,the odor theory is given weight. Were the spider notdependent upon its individual resources we shouldexpect to find it hanging from a moth-attracting flower,or at least upon a plant bearing such flowers. Artificial Pumice. While emery is used for sharpening tools, sand… … MAKING THE GLOBULE, Variations have been noted even in the same piece.This has suggested the idea of replacing it with arti-ficial pumice. The factory of Schumacher, at Bietigheim, in thevalley of the Enz, has been manufacturing an artificialpumice stone out of ground sandstone and clay forsome…
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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)
