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More "Opacity" Quotes from Famous Books
 ... from this, and other causes, it arises that when the naked light from fifty cells is looked at the blur of light upon the retina is sufficient to destroy the definition of the retinal image of the carbons. A long list of indictments might indeed be brought against the eye—its opacity, its want of symmetry, its lack of achromatism, its partial blindness. All these taken together caused Helmholt to say that, if any optician sent him an instrument so defective, he would be justified in sending it back with the severest censure. But the eye is not ...
— Six Lectures on Light - Delivered In The United States In 1872-1873 • John Tyndall
... the stack. While he was returning to the entrance, the wind rolled him over a few times, causing him to lose his bearings. It was blowing a hurricane, the temperature was -70 F., and the drift-snow was so thick as to be wall-like in opacity. He abandoned his load of coal, and, after searching about fruitlessly for some time in the darkness, he decided to wait for dawn. Hurley found him about twenty yards from ...
— The Home of the Blizzard • Douglas Mawson
... seems to lie in the temperament and in the transmuting and modifying medium. More or less of filtration does it all. Nature makes the poet, not by adding to, but by taking from; she takes all blur and opacity out of him; condenses, intensifies; lifts his nerves nearer the surface, sharpens his senses, and brings his whole organization to an edge. Sufficient filtration would convert charcoal into diamonds; and we shall ...
— Atlantic Monthly Volume 6, No. 37, November, 1860 • Various
... penetrates. The clouds perpetually formed at the top of such a current, will be perpetually thrust aside by the uncondensed gases from below them; and, growing while they are thrust aside, will collect in the spaces between the ascending currents, where there will result the greatest degree of opacity. Hence the mottled appearance—hence the "pores," or dark ...
— Essays: Scientific, Political, & Speculative, Vol. I • Herbert Spencer
... body of this rock is perfectly solid, and the salt, in many places, pure, colourless, and transparent, breaking with a sparry cubical structure. But the greatest part is tinged by the admixture of the marl, and that in various degrees, from the slightest tinge of red, to the most perfect opacity. Thus, the rock appears as if it had been a mass of fluid salt, in which had been floating a quantity of marly substance, not uniformly mixed, but every where separating and subsiding from the ...
— Theory of the Earth, Volume 1 (of 4) • James Hutton
... has extended the result to opaque bodies, and has shown that if light be passed through magnetized iron its plane is rotated. The film of iron must be exceedingly thin, because of its opacity, and hence, though the intrinsic rotating power of iron is undoubtedly very great, the observed rotation is exceedingly small and difficult to observe; and it is only by a very remarkable patience and care and ingenuity ...
— Scientific American Supplement No. 275 • Various
... of time varying from a few seconds to a quarter of an hour, according to the amount of albumen present, a delicate opalescent zone forms at the point of junction, and if mucin also is present, a more diffused haze higher up in the urine. Special attention should be given to the position of the opacity. In some concentrated urines a belt of urates will appear at the line of demarkation; but these dissolve on warming. Moreover, owing to the dilution necessary in the mode of applying Galippe's picric acid test, they are not so readily ...
— Scientific American Supplement, No. 611, September 17, 1887 • Various
... wound off from twenty-four spiders in about two hours. Mr. R. estimates its length at 18,000 feet; its colour is white, and its lustre is brilliant, and completely metallic, owing, probably, to its great opacity. No attempt has been made by him to combine two or more filaments into one by winding, nor, of course, to form it ...
— The Mirror of Literature, Amusement, and Instruction, Vol. 19, - Issue 553, June 23, 1832 • Various
... village school. He found the junior curate troubling the youthful mind with what their godfathers and godmothers did for them, and begging them to do their duty "in that state of life," etc. He listened, wondering at the pious opacity, and presently asked the children to sing. With inimitable melancholy they sang: "Oh, the Roast Beef ...
— The Judgment House • Gilbert Parker
... spite of all Billy's efforts the evening went wrong after that. Caroline was wrapped in a mantle of sorrowful meditation the opacity of which she was not willing to let Billy penetrate for a moment. After they had dined they took a taxi-cab up-town and danced for an hour on the smooth floor of one of the quieter hotels. Billy's dancing being of that light, sure, rhythmic quality that should have ...
— Outside Inn • Ethel M. Kelley
... Thirdly, squinting is a familiar example of hereditary transmission: it is frequently a result of such optical defects as have been above mentioned; but the more primary and uncomplicated forms of it are also sometimes in a marked degree transmitted in a family. Fourthly, CATARACT, or opacity of the crystalline lens, is commonly observed in persons whose parents have been similarly affected, and often at an earlier age in the children than in the parents. Occasionally more than one child in a family is thus afflicted, one of whose parents or other relations, presents the ...
— The Variation of Animals and Plants under Domestication - Volume I • Charles Darwin
... * As the opacity and porcelain-like appearance of the glands is probably due to the coagulation of the albumen, I may add, on the authority of Dr. Burdon Sanderson, that albumen coagulates at about 155o, but, in presence of acids, the temperature of coagulation is lower. The leaves of Drosera contain ...
— Insectivorous Plants • Charles Darwin
... of all Billy's efforts the evening went wrong after that. Caroline was wrapped in a mantle of sorrowful meditation the opacity of which she was not willing to let Billy penetrate for a moment. After they had dined they took a taxi-cab up-town and danced for an hour on the smooth floor of one of the quieter hotels. Billy's dancing ...
— Outside Inn • Ethel M. Kelley
... which hung over the town, and concealed the dome and tower from view—a blood-red cross appearing to shine in the heavens and rest upon Birmingham. As the traveller approached the town on that side the opacity of the fog gradually diminished until, when about three miles away, the broad lines of light which spanned the dome appeared in sight, and, magnified by the thin vapour through which they were refracted, gave the idea of some gigantic monster clawing the heavens with ...
— Showell's Dictionary of Birmingham - A History And Guide Arranged Alphabetically • Thomas T. Harman and Walter Showell
... force of gravitation. This force is absolute and universal. All the others are partial and limited. All the others, even the newly discovered cathode rays, are subject to obstruction by certain forms of matter; that is, to them certain forms of matter are opaque. But gravitation knows no opacity in the universe. No atom of matter is exempt from its sway. It streams through all obstructive media as though such media did not exist. It would appear that heat, light, electricity, sound, the cathode rays, and all other forms of force in nature are probably variations, and as it were ...
— Notable Events of the Nineteenth Century - Great Deeds of Men and Nations and the Progress of the World • Various
... possesses the double signification of ray of light and radius of a circle, he avoids its use in the latter sense and speaks always of the semi-diameter, not of the radius. His speculations as to the ether, his suggestive views of the structure of crystalline bodies, and his explanation of opacity, slight as they are, will possibly surprise the reader by their seeming modernness. And none can read his investigation of the phenomena found in Iceland spar without marvelling ...
— Treatise on Light • Christiaan Huygens
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