Proceedings of the Lake Superior Mining Institute, Volumen13The Institute, 1908 |
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Términos y frases comunes
17th level Allouez amygdaloid analyses Annual for 1903 Biwabik boiler house CaCl2 CaCO3 calcium chloride Calumet & Hecla carbonate cent CHARLES Chicago Cl₂ Coleraine compute conglomerate copper crosscut Crystal Falls Datolite Difference Total solids dripping Duluth Electric epidote Escanaba Eveleth feet Fernekes formation GEORGE grams per liter H₂O Hibbing hoist Houghton inch Iron Mountain Iron Range Ironwood Ishpeming JAMES JOHN Kearsarge Keweenawan Lake Superior Lake Superior Mining Lake Superior region laumontite lava lode Marquette Mass meeting Mesabi range Michigan miles mill mineral Minn Minnesota motor Mountain Iron Negaunee Northern Oliver Iron Mining operated organic matter oxide plant prehnite pump Quincy reactions river rock sample shaft silicate SiO2 sodium steam steel Superintendent surface waters taconite tests throttle tion tons Total solids determined U. S. gallon upper peninsula urinometer valve Vermilion range Virginia West Vulcan WILLIAM York City
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Página 1 - ENGINEERS are to promote the arts and sciences connected with the economical production of the useful minerals and metals, and the welfare of those employed in these industries, by means of meetings for social intercourse, and the reading and discussion of professional papers, and to circulate, by means of publications among its members and associates, the information thus obtained.
Página 129 - ... to and by this means the solution was drawn back into the mineral, constantly exposing new surfaces. The tubes were heated intermittently for ten hours during the day. The heat was removed in the evening and again applied the next morning. After heating the solution and prehnite in this manner for five days an explosion took place at about 250° C. A portion of the side of the tube about five centimeters from the bottom was blown off, leaving a fairly hard cake underneath. On examining this cake...
Página 4 - Institute is not, as a body, responsible for the statements of facts or opinion advanced in papers or discussions at its meetings, and it is understood, that papers and discussions should not include personalities, or matters relating to politics, or purely to trade. XII. AMENDMENTS. These rules may be amended by a two-thirds vote taken by letter ballot in the same manner as is provided for the election of officers by letter ballot, provided that written notice of the proposed amendment shall have...
Página 138 - ROCKS. Dr. AC Lane has summarized* the changes as follows: "I. 1. Primary reactions, glass decomposes, chloritic filling to cavities, ferric minerals (olivine, etc.) attacked. Chalcedony, agate, quartz, delessite and serpentine, and epidote formed; laumontite, thomsonite, and chlorastrolite in amygdules?, iron bearing red calcite, orthoclase? and ankerite? Some of these reactions may not be all primary. II. Secondary reactions. "2. Prehnite, other kinds of chlorite, also epidote and quartz formed;...
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Página 232 - The sampler shall take one round from each hatch when it is one-half unloaded, three scoop lengths vertically and twelve scoop lengths horizontally, taking only ore from fresh surfaces which have not been exposed to sun or rain. It must be thoroughly mixed at once without breaking down, and 20 Ibs. placed in a standard moisture can. Whenever it is not practical to hold the entire sample until the close of the sampling, before mixing and quartering, it may be quartered at convenient stages of the...
Página 100 - TESTS OF THE BALTIC LODE. This is the lowest of the lodes worked. It lies between a conglomerate (the Baltic conglomerate) as it is generally called (No. 3) and a heavy ophite, known as the Mabb ophite, whose mottles are up to 7 mm. across. The distance above the conglomerate varies, but is about (150) feet more or less, and it is (170 to 200) feet below the ophite. It is no one well-defined amygdaloid top to a flow but rather an impregnated shear zone or stock werk, copper being found over a belt...
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