Bulletin of the American Institute of Mining Engineers, 25-30호The Institute, 1909 |
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acid alloy AMERICAN INSTITUTE angle asphaltite assaying average beds blast Bldg bottom Bulletin calcium sulphate Cananea carbon cent Clinton Coal Measures Colo containing copper cost Denver deposits diameter district dredge drills electric Engr Exchange faulting fluorspar furnace Geological Survey Gift gold gravel heading hematite holes INSTITUTE OF MINING iron iron-ore JAMES GAYLEY Joplin Lake lime limestone Long Tons machine material metal metallurgical Mexico miles mineral Mining Engineers Missouri operations ore-bodies ore-deposits ore-materials oxide Ozark dome Ozark region P. O. Box paper Patronite Peru pipe pitch plane practice present pressure production pump pyrite R. W. RAYMOND REPORT rock Salt Lake City sample sea-level shaft shales silica slag Society steel strata sulphide sulphur surface synclines temperature Term expires February tion tons Transactions tunnel tuyeres U. S. Government vanadium vein vertical Washington Yauli York