"Pyrites" Quotes from Famous Books
 ... receiving instrument in which two pieces of quartz of different composition were used on the electrodes. In making an instrument of this kind the quartz can be purchased from a dealer in minerals. One piece must contain copper pyrites and the other zincites. The electrodes are made cupping to hold the minerals and each should have a screw adjustment to press the pieces of quartz in contact with each other. Connect as shown in the illustration, using a high resistance ...
— The Boy Mechanic: Volume 1 - 700 Things For Boys To Do • Popular Mechanics
... when drank by strangers, never fails to occasion pains in the stomach and bowels; nay, sometimes produces dysenteries. In all appearance it is impregnated with nitre, if not with something more mischievous: we know that mundic, or pyrites, very often contains a proportion of arsenic, mixed with sulphur, vitriol, and mercury. Perhaps it partakes of the acid of some coal mine; for there are coal works in this district. There is a well of purging water within a quarter of a mile of the Upper Town, to which the inhabitants resort ...
— Travels Through France and Italy • Tobias Smollett
... especially rich in other mineral contents. Some fine specimens of mica have however been obtained from the summit of Wachusett. The only other extraneous mineral found there to any great extent is the sulphuret of iron before mentioned. The common name of this mineral is iron pyrites, and being of a yellow color has in many localities in New England, in times past, caused a vast waste of time and money in a vain search for gold. It does not appear that the inhabitants of Princeton were ever thus deceived, though Whitney wrote in 1793: "Perhaps its bowels may contain very valuable ...
— Bay State Monthly, Vol. II, No. 1, October, 1884 - A Massachusetts Magazine • Various
... is termed a double salt, and is composed of sulphate of alumina and sulphate of potash. The process of manufacturing it in this country is by subjecting clay slate containing iron pyrites to a calcination, when the sulphur with the iron is oxidized, becoming sulphuric acid, which, combining with the alumina of the clay, and also with the iron, becomes sulphate of alumina and iron; ...
— Museum of Antiquity - A Description of Ancient Life • L. W. Yaggy
... can descend to their work. Passing through the entrance, the mine gradually widens underground to a depth of 1062 feet. The chief mass of ore is 600 feet broad on its upper surface, greatly narrowing as it descends to a depth of 1200 feet. Round it are other similar deposits. As the copper pyrites are deposited generally on the circumference of the outer shell of these masses, which are of a very irregular outline, the mining operations are carried on in a perfect labyrinth of winding passages and galleries, situated at various depths, and supported either by pillars or walls. It ...
— The Mines and its Wonders • W.H.G. Kingston
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