"Silica" Quotes from Famous Books
 ... fine tubes into water and made so pliable that it can be 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 ...
— Makers of Many Things • Eva March Tappan
... 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
... South, Longitude 124 degrees 17 minutes East : Taken from rough range rising out of gently undulating desert. (July 5th.) : White flinty rock; consists in the main of Silica, with Magnesia and Alumina; it also contains water and traces of the Alkalies. It is probably derived from the decomposition of granite. The ...
— Explorations in Australia • John Forrest
... 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 ...
— Checking the Waste - A Study in Conservation • Mary Huston Gregory
... which represents Troy, Dr. Schliemann 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 all bear ornaments of very primitive ...
— Manners and Monuments of Prehistoric Peoples • The Marquis de Nadaillac
... the Aluminates of Magnesia, including the sapphirine; the chrysoberyls from Brazil, and those inclosed in quartz and felspar with garnets. The next four cases (20-23) are loaded with the varieties of the Acid of Silicium or silica, which constitutes the greater part of hard stones and minerals with which the earth is encrusted. It is nearly pure in the rock crystal, of which there are many specimens in the first case (20), including those crystals called Bristol and Gibraltar ...
— How to See the British Museum in Four Visits • W. Blanchard Jerrold
... After the removal of this a qualitative analysis was made of the residual powder. Another gramme was also taken, without picking out the metallic iron, and was tested for chlorine and for phosphoric acid. The results of the qualitative analysis were that the stone contains silica, magnesia, a little alumina, oxide of iron and nickel, a little tin, an alloy of iron and nickel, phosphoric acid, and a trace of chlorine. These ingredients being determined, the plan for a quantitative analysis was laid out, and was ...
— Scientific American Supplement, No. 530, February 27, 1886 • Various
... leave the rocks bare; but usually they leave a residuum in which life strikes its roots. We do not see all that the waters take from the soil. They have invisible pockets in which they carry away all the more soluble parts, such as lime, soda, potash, silica, magnesia, and others, and leave for the land the more insoluble parts. These, too, in times of flood they carry away in suspension, in the shape of sand, silt, mud, gravel, and the like. When the waters really digest the rocks, they hold the various minerals in solution, and run limpid ...
— Time and Change • John Burroughs |
