Bulletin, Issue 95

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U.S. Government Printing Office, 1920 - Mines and mineral resources

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Page 402 - States governing their possessory title, shall have the exclusive right of possession and enjoyment of all the surface included within the lines of their locations, and of all veins, lodes and ledges throughout their entire depth, the top or apex of which lies inside of such surface lines extended downward vertically, although such veins, lodes or ledges may so far depart from a perpendicular in their course downward as to extend outside the vertical side lines of such surface locations.
Page 354 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Page 463 - Ike current is directly proportional to the electromotive force and inversely proportional to the resistance.
Page 292 - Gas-House Coal Tar. — Coal tar produced in gas-house retorts in the manufacture of illuminating gas from bituminous coal.
Page 327 - It follows: 1, talc; 2, gypsum; 3, calcite; 4, fluorite; 5, apatite; 6, orthoclase; 7, quartz; 8, topaz; 9, corundum; 10, diamond.
Page 437 - A mining claim is a parcel of land containing precious metal in its soil or rock. A location is the act of appropriating such parcel, according to certain established rules.
Page 212 - The process or processes by which the crust of the earth is deformed, producing continents and ocean basins, plateaus and mountains, flexures and folds of strata, and faults. Also, the results of these processes. (Webster) Diathermic.
Page 656 - Surface tension. That property, due to molecular forces, which exists in the surface film of all liquids and tends to bring the contained volume into a form having the least superficial area.
Page 519 - Polymeric. Having the same elements united in the same proportions by weight, but with different molecular weights. ( Webster ) Polymerize. To change into another substance having the same elements in the same proportions, but a higher molecular weight. (Webster) Polymnite.
Page 343 - Hot Drawn. — A term used to signify the product of drawing, when the operation is performed on material that is hot — usually red hot ; eg, hot-drawn seamless tubes. The term is sometimes applied to the Mannesmann product that has not been drawn.

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