"Helix" Quotes from Famous Books
 ... of copper wire one twentieth of an inch in diameter were wound round a cylinder of wood as a helix, the different spires of which were prevented from touching by a thin interposed twine. This helix was covered with calico, and then a second wire applied in the same manner. In this way twelve helices were superposed, ...
— Experimental Researches in Electricity, Volume 1 • Michael Faraday
... vanity of the man, but to indicate more precisely the species. Sometimes two men will, by accident, give the same name (independently) to two species of the same genus. More frequently a later author will misapply the specific name of an older one. Thus the Helix putris of Montagu is not H. putris of Linnaeus, though Montague supposed it to be so. In such a case we cannot define the species by Helix putris alone, but must append the name of the author whom we quote. But when a species has never borne but one name (as Corvus frugilegus), ...
— The Life and Letters of Charles Darwin, Volume I • Francis Darwin
... in its vertical dimension, by a moving plane. If necessary to assist the mind, suspend a spiral spring above a pail of water, then raise the pail until the coils, one after another, become immersed. The spring would represent the helix, and the surface of the water the moving plane. Concentrating attention upon this surface, you would see a point—the elliptical cross-section of the wire where it intersected the plane—moving round ...
— Four-Dimensional Vistas • Claude Fayette Bragdon
... a piece of copper wire into a helix or spiral, as in Fig. 7, and pass a current of electricity through it, the magnetic whirls in the surrounding space are modified, and the lines of force are no longer small circles wrapping round the conducting ...
— Scientific American Supplement, No. 324, March 18, 1882 • Various
... markings, size, form, and texture or striation of the surface, even in specimens collected in the same locality. Thus, a French author has enumerated no less than 198 varieties of the common wood-snail (Helix nemoralis), while of the equally common garden-snail (Helix hortensis) ninety varieties have been described. Fresh-water shells are also subject to great variation, so that there is much uncertainty ...
— Darwinism (1889) • Alfred Russel Wallace
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