"Silica" Quotes from Famous Books
 ... have their own way, in time there will be a gradual change in dominant character, from coarse sediments to fine, from rocks which are simply crumbled debris to rocks that are the product of chemical decay and sorting, so that we have the lime deposited as limestone in one place and the alumina and silica, in another. We shall have a change from local deposits, marine on the edges of large continents, or land deposits, very often coarse, with fossils few and far between, to rocks in which marine deposits will spread ...
— Popular Science Monthly Volume 86
... which all of the tissues of the body are composed are: carbon, oxygen, hydrogen, nitrogen, potassium, soda, lime, magnesia, iron, manganese, phosphor, sulphur, silica, chlorine, ...
— Valere Aude - Dare to Be Healthy, Or, The Light of Physical Regeneration • Louis Dechmann
... mixed with nickel and silicas. Many other alloys have been discovered within the last few years, and each makes possible new uses for iron requiring greater strength. One of the best of these is a mixture of iron and silicon, called ferro-silicon. Silica is one of the cheapest and most abundant materials of all the earth's products, so its combination with iron will greatly lengthen the life of the iron supply; and it is probable that in the future combinations of other materials will yield better and ...
— Checking the Waste - A Study in Conservation • Mary Huston Gregory
... world; Si, of the mineral. Most soils and rocks, except limestone, are mainly compounds of O, Si, and metals. While O is estimated to make up nearly one- half of the known crust of the earth, Si constitutes fully a third. The two are usually combined, as silica, SiO2, or silicates, SiO2 combined with metallic oxides. This affinity for O is so strong that Si is not found uncombined, and is separated with great difficulty and only at the highest temperatures. No special use has yet been found for it, except as an alloy with ...
— An Introduction to Chemical Science • R.P. Williams
... ignorance to indulge in such grief, for science has analysed their friend, and preserved in a series of neat phials, which they may easily carry about with them, all his constituent elements, his "essentials," his carbon, his silica, this and that gas—everything, in short, which made up the substance of him whom they were accustomed to call their beloved; therefore they may "comfort one another with these words!" And thus would the enemy of Christianity presume ...
— Parish Papers • Norman Macleod
... hear that so able a physiologist as Prof. Cohn intends to investigate the conditions under which living plants separate this substance from their tissues. That unicellular algae, like the Diatomaceae, living in a medium which may contain only one part in 10,000 by weight of dissolved silica, or even less than that amount, should be able to separate this substance to form their exquisitely ornamented frustules is one of the most striking facts in natural history, whether we regard it in its physiological or ...
— Scientific American Supplement, No. 595, May 28, 1887 • Various
... geysers, the Yellowstone Park surpasses all the rest of the world. There are probably fifty geysers that throw a column of water to the height of from 50 to 200 feet, and it is stated that there are not fewer than 5,000 springs; there are two kinds, those depositing lime and those depositing silica. The temperature of the calcareous springs is from 160 to 170 degrees, while that of the others rises to 200 or more. The principal collections are the upper and lower geyser basins of the Madison River, and the calcareous springs on Gardiner's River. The great falls are marvels to which ...
— Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 • Barkham Burroughs
... much. We have found, however, that a little marine wretch called the teredo attacks hemp so greedily that we've had to invent a new compound wherewith to coat it, namely, ground flint or silica, pitch, and tar, which gives the teredo the toothache, I suppose, for it turns him off effectually. We have also got an intermediate piece of cable to affix between the heavy shore-end and the light deep-sea portion. There ...
— The Battery and the Boiler - Adventures in Laying of Submarine Electric Cables • R.M. Ballantyne
... is frequently asserted that silica has a structural function sui generis in the plant skeleton, having a relationship to the cellulosic constituents of the plant, distinct from that of the inorganic ash components with which it is associated. It should be noted that the matter has been specifically ...
— Researches on Cellulose - 1895-1900 • C. F. Cross
... the Mokundu-kundu tree abounds; its bright yellow wood makes good boat-masts, and yields a strong bitter medicine for fever; the Gunda-tree attains to an immense size; its timber is hard, rather cross-grained, with masses of silica deposited in its substance; the large canoes, capable of carrying three or four tons, are made of its wood. For permission to cut these trees, a Portuguese gentleman of Quillimane was paying the Zulus, in 1858, two hundred dollars a year, and his successor ...
— A Popular Account of Dr. Livingstone's Expedition to the Zambesi and Its Tributaries • David Livingstone
... rises to upwards of a hundred and fifty feet into the air. The boiling water issues from conical mounds, with great noise. The whole ground around them is a mere crust, and when it is penetrated the boiling water is seen underneath. The Californian geysers, however, are impregnated, not with silica, like those of Iceland, but with sulphur, of which they form large deposits. The sulphurous vapours from the water corrode the rocks near the fountains; nevertheless trees grow, without injury to their health, at a distance from them of ...
— Wonders of Creation • Anonymous
... strontium and magnesium. Here he met with greater difficulty, and it is to be questioned whether he obtained any of these metals even in an approximately pure form (see ELECTROMETALLURGY). The discovery of boron by Gay Lussac and Davy in 1809 led Berzelius to investigate silica (silex). In the following year he announced that silica was the oxide of a hitherto unrecognized element, which he named silicium, considering it to be a metal. This has proved to be erroneous; it is non-metallic in character, and its name was altered to silicon, from analogy with ...
— Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 - "Chtelet" to "Chicago" • Various
... satin shoes. It brings home to me what an unstable chemical compound man is. Here are the stage accessories as good as ever, while the players have all split up into hydrogen and oxygen and nitrogen and carbon, with traces of iron and silica and phosphorus. A tray full of chemicals and three buckets of water,—there is the raw material of my lady in the sedan chair! It's a curious double picture, if one could but conjure it up. On the one side, the high-born bucks, the mincing ladies, the scheming courtiers, pushing ...
— The Stark Munro Letters • J. Stark Munro
... or grasses, are especially characterized by the large quantities of sugar and silica they contain. The ash of the rice hull, for example, contains ninety ...
— Scientific American Supplement, No. 623, December 10, 1887 • Various
... coal, bauxite, low-grade iron ore, calcium, natural asphalt, silica, mica, clays, ...
— The 2000 CIA World Factbook • United States. Central Intelligence Agency.
... picked up the perforated whorls to which the name of fusaioles has been given (Fig. 102), and of which we spoke in our account of the Lake Dwellings of Switzerland. These fusaioles are generally of common clay mixed with bits of mica, quartz, or silica, though some few have been found at Mykenae and Tiryns of steatite. The clay whorls before being baked were plunged into a bath of a very fine clay of gray, yellow, or black color, and then carefully polished. They nearly ...
— Manners and Monuments of Prehistoric Peoples • The Marquis de Nadaillac
... deeper and deeper into the steel wall of the pipe. Soon it broke through, and the slight rush of air was stopped by the insertion of a tightly fitting rubber tube. The tube terminated in a heavy rubber balloon, which surrounded a frail glass bulb. The man stood tense, one hand holding before his silica-and-steel helmeted head a large pocket chronometer, the other lightly grasping the balloon. A sneering grin was upon his face as he awaited the exact second of action—the carefully pre-determined instant when his right hand, closing, ...
— Triplanetary • Edward Elmer Smith
... surrounding felspar. Chlorite also is abundant both in sheared and unsheared diabases, and with it calcite may make its appearance, or the lime set free from the augite may combine with the titanium of the iron oxide and with silica to form incrustations or borders of sphene around the original crystals of ilmenite. Epidote is another secondary lime-bearing mineral which results from the decomposition of the soda lime felspars and the pyroxenes. Many diabases, especially those ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 - "Destructors" to "Diameter" • Various
... grasses. There was, too, a great variety of moss and fungi. The soil looked black and fertile, and new-comers thought they were going to have good crops, but when these failed they found, upon examining the earth, that it was little more than black sand, and the particles of silica glittered if a handful were held in the sun. Such a sand would give the impression of dryness, instead of which it was extremely damp—damp all the ...
— Field and Hedgerow • Richard Jefferies |
