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32. Leadville District, ColoradoBy Ogden Tweto
The Leadville district, on the west flank of the Mosquito Range in central Colorado, has produced silver, zinc, lead, gold, and minor metals valued at $512,000,000. The ore deposits are in a sequence
Jan 1, 1968
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Papers - Recrystallization and Precipitation on Aging of Tin-bismuth Alloys (T.P. 1364, with discussion)By J. E. Burke, C. W. Mason
In attempting to study precipitation from a tetragonal lattice, using solid solutione of bismuth in tin, it was found that although a Widmanstätten pattern is observed1,4 only a qualitative analysis o
Jan 1, 1942
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Papers - Recrystallization and Precipitation on Aging of Tin-bismuth Alloys (T.P. 1364, with discussion)By J. E. Burke, C. W. Mason
In attempting to study precipitation from a tetragonal lattice, using solid solutione of bismuth in tin, it was found that although a Widmanstätten pattern is observed1,4 only a qualitative analysis o
Jan 1, 1942
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Papers - Production - Domestic - Oil and Gas Development in South Arkansas in 1940By Warren B. Weeks
The year 1940 saw an increase of 20 per cent in oil production over the previous year—compared with a 16 per cent increase the previous year. In all, 25,790,380 bbl. were produced, an increase of 4,41
Jan 1, 1941
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Papers - Production - Domestic - Oil and Gas Development in South Arkansas in 1940By Warren B. Weeks
The year 1940 saw an increase of 20 per cent in oil production over the previous year—compared with a 16 per cent increase the previous year. In all, 25,790,380 bbl. were produced, an increase of 4,41
Jan 1, 1941
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The Cyaniding Of Silver-Ores In Mexico.By ALBERT P. J. BORDEAUX
THIS paper briefly describes the general outline of cyaniding silver-ores in Mexico, with special reference to personal experiments made in the Temascaltepec district. The most important papers on th
Jan 1, 1910
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Some Comparative Properties of Tough Pitch and Phosphorized Copper (56e4885e-4963-4d51-8581-9b21d382d457)By Webster, Wm. Reuben
THE greatly enlarged demand for small sizes of seamless copper tube which has recently occurred, due particularly to the rapid growth of the electric household-refrigerator industry, has emphasized th
Jan 1, 1927
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Mining Methods and SystemsBy Thomas T. Read
EVERYONE engaged in the teaching of mining engineering will, I suppose, agree that the most difficult subject to teach is "Mining Methods." One primary difficulty is that the students taking the cours
Jan 1, 1930
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Leaching Of Metal OxidesBy I. H. Warren, E. Devuyst
A review of the physical and chemical aspects of the direct leaching of metal oxides has been given and com- pared to recent data of the authors and co-workers. The physical aspects, including the
Jan 1, 1973
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Memoranda on the Analysis of StatisticsBy A. W. Hale
IN a work published in 1838, De Morgan, the author of the article on "Probabilities,' in the Encyclopedia Metropolitana, says " The method of least squares is not yet introduced into the affairs
Jan 1, 1881
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Geology and Mining of the Tin-Deposits of Cape Prince of Wales, AlaskaBy Albert Hill Fay
IN giving a sketch of the geology and mining of the tin-deposits of Cape Prince of Wales, a short description of the geographic and climatic conditions may be of special interest on account of this be
Sep 1, 1907
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Unwise and Dangerous Provisions of Engineering Registration LawsBy G. M. BUTLER
TWENTY-ONE of the states in the Union, the Territory of Hawaii, and seven provinces of Canada now have in operation laws requiring that professional engineers be registered or licensed. In addition, t
Jan 1, 1930
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Patents and Litigation as Viewed by an EngineerBy William E. Greenawalt
IN these days of special legislation for the benefit of various industries one might well consider one branch of human endeavor intimately associated with engineering-that of patents and patent litiga
Jan 1, 1937
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Titanium - A Growing Industry - War-Born U. S. Production Has Good Chance to Survive Postwar CompetitionBy OTTO HERRES
TITANIUM is estimated to be the ninth most plentiful element, ranking after iron, aluminum, and magnesium, and ahead of copper, lead, and zinc. Vast quantities of titanium are widespread throughout th
Jan 1, 1946
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Discussion - Of Mr. Barrows' Paper on the Use of High Percentages of Mesabi Iron-Ores in Coke Blast-Furnace Practice (see p. 140)F. E. Bachman, Port Henry, N. T. (communication to the Secretary*):—In discussing Mr. o.o.Laudig's paper, the Action of Blast-Furnace Gases Upon Various Iron-Ores,' I took the ground that Me
Jan 1, 1905
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Washington Paper - The Cedar Point Iron Company's Furnace, No. 1, at Port Henry, Essex County, New YorkBy T. F. Witherbee
It is proposed to give, first, a description of the works; second, a report of the first six months of the present blast; and third, such improvements as have been suggested by the practical working.
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The Cedar Point Iron Company's Furnace, No. 1 At Port Henry, Essex County, N. Y.By T. F. Witherbee
IT is proposed to give, first, a description of the works ; second, a report of the first six months of the present blast; and third, such improvements as have been suggested by the practical working.
Jan 1, 1876
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Minnesota's Iron Mining IndustryBy AIME AIME
APROXIMATELY one third of the world's iron ore is mined in the United States; and about 80 per cent of this third is mined in the Lake Superior ore region, and about 60 per cent in Minnesota. Th
Jan 1, 1941
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Pennsylvania's Subsidence - Control Guidelines: Should They Be Adopted By Other States?By Christopher J. Bise
Introduction In August 1977, the federal Surface Mining Control and Reclamation Act was signed into law. It stated that: "The Congress finds and declares that because of the diversity in terrain .
Jan 1, 1982
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Preparedness Makes Heavy Demand on Copper-Mining IndustryBy Cornelius F. Kelley
EVERY man connected with the mining industry should take a significant pride in the fact that he belongs to an industry and to a profession that, from the beginning, has been constructive. The miner d
Jan 1, 1941