Transactions of the American Institute of Mining, Metallurgical and Petroleum Engineers, Količina 51

accidents amount andesite average barite beds blast bottom briquets calcite carbon cave cementite cent charge chloride clay coal coke colloidal concentration containing copper cost County Cretaceous cupellation deposits depreciation depth developed diameter dikes district drill efficiency engines fissures flue fuel furnace gases grains granite hammer drills heat hole igneous rocks increased ingot iron kaolin kaolinite Katalla limestone limonite lines locomotives manganese manganese steel material matte Mayari metal method miles mill mineral mining mixture occur operation orebody oxide paper percentage pillars pipe plant plasticity potash practically pressure probably production pump pyrite rails residual reverberatory reverberatory furnaces riffles rock salt sand sandstone shaft shale shown silica silver slag slip bands smelting solution sphalerite stoping stove sulphide sulphur surface synthetic crude temperature tests thickness timber tion tonnage tons trolley veins zinc