Bi-monthly Bulletin of the American Institute of Mining Engineers, Issues 13-15

acid American Institute amount axial Bi-Monthly Bulletin blast-furnace Bldg blow-holes blowing bottom building carbon cavity cent chalcopyrite charge chemical coal Colo containing cooling copper creek crystals cuprous cuprous oxide curve diameter diopside effect electric Engineering Society Engr eutectic expansion experiments fault fissures freezing freezing-point furnace galena gas-engines gases Geological grains granite H₂SO heat ingot injury inner walls INSTITUTE OF MINING iron JAMES GAYLEY layer limestone manganese manufacture mass material metal Metallurgy Mexico mill mineral MINING ENGINEERS mold molten lake N. Y. New York North River tunnels ore-bodies outer walls oxide paper percentage phosphorus pipe plants porphyry pressure produced pyrite quantity quartz quartz-porphyry rails rhyolite rock sample segregation shaft shield silver slime smoke solidifying solution soot specific gravity steel sulphide sulphur sulphuric acid surface Table temperature tests tion Tonopah tough-pitch tunnel upper vein