"Chemical action" Quotes from Famous Books
 ... tungsten deposits a hydrated oxide called tungstite has been formed as a canary-yellow coating at the surface. On the whole, however, tungsten minerals are very resistant to weathering, and in all their deposits secondary concentration by chemical action at the surface has not played any appreciable part. The disappearance of tungsten minerals from alluvial materials which are undergoing laterization, which has been described in Burma,[32] seems to indicate ...
— The Economic Aspect of Geology • C. K. Leith
... the immediate vicinity of the volcanic focus. The second great division of rocks is that of the Fossiliferous, Aqueous, or Sedimentary Rocks. These are formed at the surface of the earth, and, as implied by one of their names, are invariably deposited in water. They are produced by vital or chemical action, or are formed from the "sediment" produced by the disintegration and reconstruction of previously existing rocks, without previous solution; they mostly contain fossils; and they are arranged in distinct layers ...
— The Ancient Life History of the Earth • Henry Alleyne Nicholson
... and I could adduce an instance of a legal controversy having taken place to settle the disputes between the proprietors of an estate and a plumber, originating from a similar cause—the plumber being accused of having furnished a faulty reservoir; whereas the case was proved to be owing to the chemical action of the water on the lead. Water containing a large quantity of common air and carbonic acid gas, always acts ...
— A Treatise on Adulterations of Food, and Culinary Poisons • Fredrick Accum
... around. Again, by the time the rain has sunk through the soil, it is still less pure. It carries with it not only carbonic acid, but acids produced by decaying vegetables—by the roots of the grasses and trees which grow above; and they dissolve the cement of the rock by chemical action, especially if the cement be lime or iron. You may see this for yourselves, again and again. You may see how the root of a tree, penetrating the earth, discolours the soil with which it is in contact. You may see how the whole rock, just below the soil, has often changed ...
— Town Geology • Charles Kingsley
... destructive action on artists' pigments, e.g., the blackening of vermilion, was recorded 2,000 years ago by Vitruvius. Since that time it has been well established, by numerous observations and experiments, that light possesses, in a high degree, the power of exerting chemical action, i.e., causing the combination or decomposition of a large number of substances. The union of chlorine with hydrogen gas, the blackening of silver salts, the reduction of bichromate of potash and of certain ferric salts in contact with organic ...
— Scientific American Supplement, No. 810, July 11, 1891 • Various
... radiant energy converted into electrical energy directly and without chemical action, and flowing in the same direction as the original radiant energy, which thus continues its course, but through a new conducting medium suited to its present form. This current is continuous, constant, and of considerable ...
— Scientific American Supplement, No. 492, June 6, 1885 • Various
... solar heat is the source of all the stores of heat required for chemical change. But there are differences in the modes of the action of heat; and the kind of contact with heat-corpuscles, or the kind of heat with chemical action which transforms colours, is supposed to differ from what ...
— A History of Indian Philosophy, Vol. 1 • Surendranath Dasgupta
... impenetrability of the mystery that surrounds us; the phenomena of nature, the discoveries of science, instead of raising the veil, seem only to make the problem more complex, more bizarre, more insoluble; the investigation of the laws of light, of electricity, of chemical action, of the causes of disease, the influence of heredity—all these things may minister to our convenience and our health, but they make the mind of God, the nature of the First Cause, an infinitely ...
— From a College Window • Arthur Christopher Benson
... several times, until the liquid flows off in one continuous and even sheet of liquid; and this also has a beneficial effect in washing off any little particles of collodion, dust, oxide, or any foreign matter which, if adherent, would form centres of chemical action, and cause spottiness ...
— Notes and Queries, No. 181, April 16, 1853 • Various
... distinguish them from the other constituents of the spectrum. As regards their action upon the salts of silver, and many other substances, they may perhaps merit this title; but in the case of the grandest example of the chemical action of light—the decomposition of carbonic acid in the leaves of plants, with which my eminent friend Dr. Draper (now no more) has so indissolubly associated his name—the yellow rays are found to ...
— Six Lectures on Light - Delivered In The United States In 1872-1873 • John Tyndall
... in the secondary and tertiary epochs the alteration of vegetable tissues generally led to lignite, while now they give rise to peat. In other words, the nature of the combustible formed at every great epoch depended upon general climatic conditions and local chemical action. Anthracite and bituminous coal would have belonged especially to primary times, lignites to secondary and tertiary times, and peat to our own epoch, without the peat ever being able to become lignites or ...
— Scientific American Supplement, No. 481, March 21, 1885 • Various
... procedure, and one that often leads to bewildering contradictions; or he must look upon himself with all his high thoughts and aspirations, and upon all other manifestations of life, as merely a chance product of the blind mechanical and chemical action and interaction of the ...
— The Breath of Life • John Burroughs |
