Bulletin of the American Institute of Mining and Metallurgical Engineers with which is Consolidated the American Institute of Metals, Випуски 19 – 24American Institute of Mining and Metallurgical Engineers., 1908 |
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Bulletin of the American Institute of Mining and Metallurgical ..., Випуск 138 Повний перегляд - 1918 |
Bulletin of the American Institute of Mining and ..., Випуски 7 – 12 Повний перегляд - 1906 |
Bulletin of the American Institute of Mining and ..., Випуски 85 – 90 Повний перегляд - 1914 |
Загальні терміни та фрази
90 per cent acid amount andesite aplite austenite average based on original bedding bornite Cam-shaft rev carbon cast-iron cementite chalcopyrite chemical concentration based Condoto containing coolies cooling copper crystals deposits diameter dikes district dredge eutectic feldspar fuel furnace galena Geological gold grains granite graphite gravel igneous igneous rocks ingot INSTITUTE OF MINING Involute cam iron Kaffirs labor limestone magma mass material mattes metal miles mill minerals MINING ENGINEERS N. Y. New York natives ore-bodies ore-column ore-deposits original feed orthoclase oxidation pegmatite peridotite Pierrefitte pipe present Prof pulsion pure coal pyrite quantity quartz Quartz 80 rails Rand Ratio of concentration rhyolite river rocks samples sand schists segregation shaft siliceous silicon silver slag solubility sphalerite steel Stroke sulphide sulphur surface temperature tests tion tons tourmaline tunnel veins velocity
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Сторінка 1092 - ... Foreign Economic Administration, who shall serve as Chairman, the Secretary of State, and three persons appointed by the President of the United States by and with the advice and consent of the Senate. The Secretary of State, to such extent as he deems it advisable, may designate to act for him in the discharge of his duties as a member of the Board of Directors any officer of the Department of State who shall have been appointed by and with the advice and consent of the Senate.
Сторінка 672 - That for ways that are dark, And for tricks that are vain, The heathen Chinee is peculiar — Which the same I am free to maintain.
Сторінка 188 - The first stage of pronounced alteration is the disintegration of the firm rock into a mass of hard, angular fragments, varying in size from that of a bean to that of a human fist, which apparently do not readily disintegrate on exposure to the weather. The second stage of alteration, due to further weathering, yields a compact mass, the so-called "green ground," showing various shades of light olive green, often bluish in tint when moist, but becoming yellowish on drying.
Сторінка 316 - Price 5 cents. 17. On the Development of Crystallization in the Igneous Rocks of Washoe, Nevada, with Notes on the Geology of the District, by Arnold Hague and Joseph P. Iddings. 1885. 8°.
Сторінка 614 - Iron containing so much carbon or its equivalent that it is not malleable at any temperature. The committee recommends drawing the line between cast iron and steel at 2.20 per cent carbon. Cast Steel. — The same as crucible steel; obsolete, and confusing; the terms " crucible steel " or " tool steel
Сторінка 1153 - ... June, 1908. SUMMARY. The results to date on this series of tests confirm the conclusion set forth in the summary of Bulletin No. 17 by Prof. SW Parr and Mr. Hamilton, except that 4 per cent seems to be amply sufficient to cover the losses sustained by Illinois coals under regular storage conditions, the larger losses indicated in the former series being probably due to the small size of the samples exposed as against car-load lots in the present series. In these latter tests, the losses sustained...
Сторінка 1015 - Its soft ore, now nearly all mined out either by surface trenches or slopes, is the best in the district. Its hard ore is also of high grade and hitherto has been for the most part held in reserve, since ore could be produced from the thicker Big seam at a lower cost per unit of iron. The structure and composition of the Big and Irondale seams...
Сторінка 1015 - About the middle of the district the seam becomes separated into two benches, either by a well-defined parting along the bedding plane or by a shale bed, thin at first, but thickening gradually to the southwest. The middle of the Big seam is the workable part in the northeast end of the district, but the upper bench is of most importance throughout the rest of the area. In the southwest portion of the district the lower bench, which farther northeast is composed of ore that...
Сторінка 1172 - In consideration of the confidence which he invokes and expects, notwithstanding the fact that he has been paid by interested parties, he assumes a sacred trust, obligating him to safeguard the interests of a wider and more important clientage. ' The investor has not the time, and perhaps not the technical knowledge, required for the thorough study of a prospectus. He risks his money upon his belief in the ability and integrity of the engineer, who is therefore bound in prudence and in honor to be...
Сторінка 1007 - They are developed mainly on the softest and most soluble rocks, along the axes of anticlines, the most enduring strata on the limbs of the folds forming the rims of the valleys. At distances of 2 to 5 miles apart openings or