The Mineral Industry, Band 9Scientific Publishing Company, 1901 |
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Häufige Begriffe und Wortgruppen
acetylene alkali alloy aluminum amount anode antimony assay average blast brick calcined calcium calcium carbide carbide carbon carnallite cement chemical chlorate chloride clay coal coke Colo concentrates containing copper cost crude crushed crystals cyanide deposits distillation district electrolytic Engineering exports fuel furnace gases Germany gold graphite heat hydrochloric acid important impurities increase kiln lead lime liquor long tons manganese manufacture material matte metal method metric tons mill MINERAL INDUSTRY mines nickel nitric acid obtained operation output oxide paraffine Patent petroleum pig iron plant plates platinum potassium potassium chloride precipitated production pyrites quantity reduced refining reported roasting rock salt samples short tons silica silver slag slimes smelters smelting soda sodium solution steam steel sulphate sulphide sulphuric acid tanks temperature tion treated treatment United Utah Value washed water gas yield zinc
Beliebte Passagen
Seite xvii - Kilogramme is a mass of platinum-iridium deposited at the same place, and its weight in vacuo is the same as that of the Kilogramme des Archives. The...
Seite xvii - By the concurrent action of the principal Governments of the world an International Bureau of Weights and Measures has been established near Paris. Under the direction of the International Committee, two ingots were cast of pure platinum-indium in the proportion of g parts of the former to i of the latter metal.
Seite xvii - Gold: 25 pesetas. Silver: 5 pesetas. Gold: 10 and 20 crowns. Gold: 5, 10, 2ti, 50 and 100 francs.
Seite 100 - ... but at the same time will not receive the direct touch of the flame from the fuel. It is always well to put two or more cones...
Seite 581 - The body called carnotite is probably a mixture of minerals of which analysis fails to reveal the exact nature. Instead of being the pure uranyl-potassium vanadate, it is to a large extent made up of calcium and barium compounds. Intimately mixed with and entirely obscured by it is an amorphous substance — a silicate or mixture of silicates — containing vanadium in the trivalent state, probably replacing aluminum.
Seite xvii - From one of these a certain number of kilograms were prepared, from the other a definite number of meter bars. These standards of weight and length were intercompared, without preference, and certain ones were selected as International prototype standards. The others were distributed by lot, in September, 1889, to the different governments, and are called National prototype standards.
Seite 99 - As at present put on the market, the thermoelectric pyrometer costs about $180, and the price, delicacy of the instrument, and lack of realization of its importance have all tended to restrict its use. However, many of the larger clay-working plants are adopting it, as it is better than other forms of pyrometer for general use and probably more accurate. It can be used up to 1600°...
Seite xvii - The yard in use in the United States Is therefore equal to the British yard. The only authorized material standard of customary weight is the Troy pound of the Mint. It is of brass of unknown density, and therefore not suitable for a standard of mass. It was derived from the British standard Troy pound of 1758 by direct comparison.
Seite 700 - The same treatment is sometimes applied to commercial jeweler's rouge. The polishing may be done entirely by hand or it may be hastened by the use of some simple power-driven machine consisting of revolving emery wheels and discs upon which the various powders are spread.
Seite xxvii - Md., in 1870, and received his early education in the public schools of that city.