"Silica" Quotes from Famous Books
 ... dedication and saint-lore? Probably not. South of Cadgwith are some of the grand caves and rock-freaks that have a more immediate appeal, and north of the hamlet some of the best serpentine is obtained. Serpentine is a blend of silica and manganese, so named from its imagined resemblance to a snake's skin; its colour varies from green to red and brownish yellow, and is often remarkably beautiful. It has been used with striking effect, architecturally, in Truro Cathedral; while ...
— The Cornwall Coast • Arthur L. Salmon
... matter that has never been alive. Through all the little hairs of its roots it sucks in water, and in this water are dissolved more or less of the salts of ammonia, phosphorus, sulphur, iron, lime, magnesia, and even silica, or flint. In all kinds of earth there is some iron, and we shall see presently that this is very important to ...
— The Fairy-Land of Science • Arabella B. Buckley
... as if they had minute brains in their extremities. They feel their way into the soil; they know the elements the plant wants; some select more lime, others more potash, others more magnesia. The wheat rootlets select more silica to make the stalk; the pea rootlets select more lime: the pea does not need the silica. The individuality of plants and trees in this respect is most remarkable. The cells of each seem to know what particular elements they want from the soil, as ...
— Under the Maples • John Burroughs
... tends to spread outwards through the 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 of the teschenite sub-group, ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 - "Destructors" to "Diameter" • Various
... to the height of several hundred feet showed unmistakable signs of volcanic action beneath the crust over which we were traveling. A considerable portion of the slope of the mountain was covered with a hollow incrustation of sulphur and lime, or silica, from which issued in many places hot steam, and we found many small craters from six to twelve inches in diameter, from which issued the sound of the boiling sulphur or mud, and in many instances we could see the mud or sulphur water. There are many other springs ...
— The Discovery of Yellowstone Park • Nathaniel Pitt Langford
... to the springs at Jigabo, province of Albay, the waters of which carry in solution a gelatinous silica, which is quickly incrusted on any object placed therein. See Report of U.S. Philippine Commission, ...
— The Philippine Islands, 1493-1898 • Emma Helen Blair
... steamer, stood before us brimful of water just upon the simmer; while up into the air above our heads rose a great column of vapour, looking as if it was going to turn into the Fisherman's Genie. The ground about the brim was composed of layers of incrusted silica, like the outside of an oyster, sloping gently down on all sides from ...
— Letters From High Latitudes • The Marquess of Dufferin (Lord Dufferin)
... scarce half an inch apart? Why, for instance, should that vesicle have elaborated only green earth, and the vesicle separated from it by a partition barely a line in thickness, have elaborated only chalcedony? Why should this chamber contain only a quartzose compound of oxygen and silica, and that second chamber beside it contain only a calcareous compound of lime and carbonic acid? What law directed infiltrations so diverse to seek out for themselves vesicles in such close neighborhood, and to keep, in so many instances, each to his own vesicle? I can but ...
— The Cruise of the Betsey • Hugh Miller
... 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 ...
— Scientific American Supplement, No. 595, May 28, 1887 • Various
... I visited the stalactite springs, not far distant, of Naglegbeng. [105] I had expected to see a calcareous fountain, but found the most magnificent masses of silica of infinite variety of form; shallow cones with cylindrical summits, pyramidal flights of steps, round basins with ribbed margins, and ponds of boiling water. One spot, denuded of trees, from two to three hundred paces in breadth and about five hundred in length, ...
— The Former Philippines thru Foreign Eyes • Fedor Jagor; Tomas de Comyn; Chas. Wilkes; Rudolf Virchow.
... 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 ...
— Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 • Barkham Burroughs
... inflammability being caused by 2.1 per cent. of hydrogen silicide. Practically speaking, all the foregoing remarks made about phosphine apply equally to hydrogen silicide: it burns to solid silicon oxide (silica) at the burners, is insoluble in water, and is spontaneously inflammable when alone or only slightly diluted, but never occurs in good carbide in sufficient proportion to render the acetylene itself inflammable. According to Caro the silicon may be present both as hydrogen silicide ...
— Acetylene, The Principles Of Its Generation And Use • F. H. Leeds and W. J. Atkinson Butterfield
... hard to find any one less informed about such phenomena than myself; but of course I had heard of mineral springs so saturated with silica that the leaves and twigs which fell into them were turned to stone after a time. I dimly comprehended the process, how the silica replaced the vegetable matter, atom by atom, and the result was a duplicate of the object in stone. This, I confess, had never interested me greatly, ...
— The King In Yellow • Robert W. Chambers
... passage of heat through all substances is increased by cohesion, even some of those which are known to be among the best conductors are deprived of this property by a division or disintegration of their particles. Pure silica in the state of hard, rock crystal is a better conductor than bismuth or lead; but if the rock crystal be pulverized, the diffusion of heat through its powder is very slow and feeble. Heat is conducted swiftly and copiously through transparent rock salt, but pulverization ...
— Scientific American, Vol.22, No. 1, January 1, 1870 • Various
... is that whatever virtue the red clover can boast for counteracting a scrofulous disposition, and as antidotal to cancer, resides in its highly-elaborated lime, silica, and other earthy salts. Moreover, this experience is not new. Sir Spencer Wells, twenty years ago, recorded some cases of confirmed cancer cured by taking powdered and triturated oyster shells; whilst egg shells similarly ...
— Herbal Simples Approved for Modern Uses of Cure • William Thomas Fernie
... silica? Practically the same as sand! Well now if ye put a handful of sand into a man's brain—or anyhow next door to it, it's bound to have some effect, bound ...
— Simon • J. Storer Clouston
... internal fires had no influence on the formation of metalliferous veins, indeed, it is certain that they had, but the action was what is termed hydrothermal (hot water); and such action we may see in progress to-day in New Zealand, where hot springs stream or spout above the surface, when the silica and lime impregnated water, reduced in heat and released from pressure, begins forthwith to deposit the minerals previously held in solution. Hence the formation of the wondrous Pink and White Terrace, destroyed by volcanic action some eight years since, which grew ...
— Getting Gold • J. C. F. Johnson
... 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, fluorine ...
— Valere Aude - Dare to Be Healthy, Or, The Light of Physical Regeneration • Louis Dechmann
... Geysers, one having jets of clear water, the other puffs of scalding vapour, coming up through a soft mud or clay of a reddish colour, probably from iron salts. In the water silica is held in solution by salts of soda, a silicate of soda being the chief ingredient. They are said to have great remediable powers; but, judging from the facility with which objects are encrusted ...
— A Girl's Ride in Iceland • Ethel Brilliana Alec-Tweedie
... health. And now, can you advise me how to make soil approximately free of all the substances which plants naturally absorb? I suppose white silver sand, sold for cleaning harness, etc., is nearly pure silica, but what am I to do for alumina? Without some alumina I imagine that it would be impossible to keep the soil damp and fit for the growth of plants. I presume that clay washed over and over again in water would still yield mineral matter to the carbonic acid secreted by ...
— The Life and Letters of Charles Darwin, Volume II • Francis Darwin
... twisted into cord or spun and woven into "silk." Not only water but also fire can be kept out by paper if it is treated with the proper substances. An object can be covered with a paste of wood pulp, silica, and hemp; and when this is dry, a coat of water-glass will afford considerable protection. There has been some degree of success in making transparent paper films for moving pictures; and if these are ...
— Makers of Many Things • Eva March Tappan
... This piece of wheat-straw contains more than sixty per cent of silica or flint in its composition; so that, although a vegetable, it is nearly two-thirds composed of the hardest mineral substance we know of. You would scarcely believe that the fibres of the root of this plant were capable of dissolving, feeding upon, and ...
— The Mission; or Scenes in Africa • Captain Frederick Marryat
... to more careful examination of the nascent states of silica, I have made no allusion in this volume to the influence of mere segregation, as connected with the crystalline power. It has only been recently, during the study of the breccias alluded to in page 186, that ...
— The Ethics of the Dust • John Ruskin
... stone! How far did it extend? As far as he could see; it might even extend to the boundary of the estate. In any case, here was sufficient for extensive works for many, many years, if only there were enough silica with the clay and lime. He had soon knocked off a few pieces, which he put into the boat, and set out for home ...
— Absalom's Hair • Bjornstjerne Bjornson
... A considerable proportion of iron is found in all of them, partly in a malleable state, partly in that of an oxide, and always in combination with a rather scarce metal called nickel; {181} the earths silica, and magnesia, and sulphur, form the other chief ingredients; but, the earths alumina and lime, the metals manganese, chrome, and cobalt, together with carbon, soda, and water, have also been found in small quantities, but not in the same specimens. No substance with which chemists ...
— The Rain Cloud - or, An Account of the Nature, Properties, Dangers and Uses of Rain • Anonymous |
