The Mineral Industry, Volume 8

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Scientific Publishing Company, 1900 - Mineral industries
 

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Page xviii - Gold : 25 pesetas. Silver : 5 pesetas. Gold : 10 and 20 crowns. Gold : 5, 10, 20, 50, and 100 francs. Silver : 5 francs. Gold : 25, 50, 100, 250, and 500 piasters.
Page xviii - 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 9 parts of the former to i of the latter metal.
Page 243 - Green glass. Embraces all the common kinds of glass, and is not necessarily green in color. It is used in the manufacture of bottles, carboys, fruit jars, etc. 6. Lime flint. Embraces the finer grades of bottles used for the prescription trade, tumblers, certain lines of pressed table ware, and many novelties.
Page xviii - Silver: sucre and divisions. Gold: pound (100 piasters), 5, 10, 20 and 50 piasters. Silver: 1, 2, 5, 10 and 20 piasters. Gold: 20 marks ($3.859), 10 marks ($1.93).
Page 764 - The work of hydraulic jigs depends, as a rule, upon the action of two currents of water, an upward and a downward, alternating with each other in quick succession, upon a bed of sand supported by a screen. Sands of two or more specific gravities, during the upward movement, called pulsion, arrange themselves according to the law of hindered settling (see 466).
Page 348 - ... was probably made of graphite from the Borrowdale mines, which, we are told, were in operation in the sixteenth century. Its uses for other purposes than pencils are of much more recent date, probably all of them falling within the * present century, and nearly all within the last few years. The present uses of graphite include the manufacture of pencils, crucibles, stove polish, foundry facing, paint, motor and dynamo brushes, anti-friction compounds, electrodes for electro-metallurgical work,...
Page xviii - 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.
Page xviii - ... in a vacuum, the volume of such a quantity of water being, as nearly as has been ascertained, equal to a cubic decimeter.
Page 190 - ... sulphuric acid. The formation of cupric sulphate is very desirable, as it saves acid in the subsequent treatment, but still it is not advisable to conduct the roasting so that as much as...
Page 710 - When a piece of steel, hardened or unhardened, is heated to the temperature \V, all previous crystallisation, however coarse or however distorted by cold work, is obliterated and replaced by the finest structure which the metal is capable of assuming,!

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