The Mining World, Volume 28Mining World Company, 1908 - Mineral industries |
Other editions - View all
Common terms and phrases
acid Alaska April Ariz assay average Batopilas British Columbia Butte camp Cananea cars City claims coal Cobalt coke Colo concentrating copper cost Creek crosscut cupel cyanide Denver deposits depth district dividends drift drill dump electric engine equipment ex-div filed furnace gold Goldfield grade Guanajuato Hill hoist Idaho illus installed iron June Kerr Lake Lake lead lease ledge long ton machine machinery manager ment metal Mexico miles mill miners Mining World Mont Montana months Mountain Name of Company Nevada non-assess operation output plant produced pumps quartz Rawhide recently rock shaft shipments shipped short ton silver sinking smelter smelting South stamp mill stamps steam steel sulphur surface tellurium timber tion Tonopah tons Transvaal tunnel United Utah vein week York zinc
Popular passages
Page 782 - We recommend the enactment of laws looking to the prevention of waste in the mining and extraction of coal, oil, gas, and other minerals with a view to their wise conservation for the use of the People, and to the protection of human life in the mines. Let us conserve the foundations of our prosperity.
Page 649 - When the men go into the mine in the morning they shall be entitled to two hours' pay, whether or not the mine works the full two hours. But after the first two hours the men shall be paid for every hour thereafter by the hour, for each hour's work or fractional part thereof. If for any reason the regular routine...
Page 860 - Wash the precipitate and paper ten times with hot water using not more than 10 or 15 cc. of water each time. Remove the filter from the funnel, open and lay against the sides of the beaker in which the precipitation was made, wash from the paper into the beaker with hot water, add dilute sulphuric acid, fold the paper over and allow to remain against the walls of the beaker. Heat to .80° C. and titrate...
Page 627 - That it shall be the province and duty of said bureau and its director, under the direction of the Secretary of the Interior, to make diligent investigation of the methods of mining, especially in relation to the safety of miners and the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention of accidents, and other inquiries...
Page 871 - The committee considers that over the whole area covered by their investigations — namely,, the Adirondack mountains, that portion of Eastern Ontario (which they examined, the ' Original Laurentian areas ' in the province of Quebec and its continuation to the east as far as the River St. Maurice — the Pre-Cambrian sedimentary development is represented by one great series. This series is essentially identical in petrographical character throughout the whole region.
Page 637 - On account of the slight difference in the specific gravity of the gray coal and the bone, the spirals are adjusted so as to retain only the slate and flat sulphur balls, leaving the bone to be removed by hand. The round sulphur balls which on account of their shape are the first to leave the spirals and go with the coal, also have to be removed by hand. The...
Page 860 - Heat to boiling and add 10 cc. of a 10 per cent. solution of oxalic acid. Stir until the oxides of iron and aluminum are entirely dissolved and only a slight precipitate of calcium oxalate remains. Now add 200 cc. of boiling water and sufficient (20 cc.) saturated solution of ammonium oxalate to* precipitate the lime.
Page 867 - The three are often used together to advantage in the same place, especially where the ores begin at or near the surface and continue irregularly to some depth below. In such cases, open-cut and pit work is used; and, from the bottom of the open work, shafts are sunk and drifts are run at different levels from the shafts. Tunneling becomes necessary in most of the steeper slope deposits. In the lower deposits, especially those of the valley bottoms, shafting and tunneling is most advantageously employed.
Page 782 - At the same time the consumption of coal for motive power would be reduced 50 per cent to 75 per cent, with a corresponding reduction in the coal required for smelting. No single step open to us today would do more to check the drain on iron and coal than the substitution of water-carriage for rail-carriage wherever practicable, and the careful adjustment of the one to the other throughout the country.
Page 793 - ... railroad from the city of Cebu to Danao. a distance of 32 kilometers (20 miles), is completed at this date. From Danao to the Camansi workings is a distance of about 8 kilometers (5 miles) with a rise of 75 meters (250 feet). There is now a tramroad over this course, an heirloom from the Spanish regime; but this will need to be replaced by new rails and more clearing will have to be done before any extensive work is undertaken. The transportation problem in the other parts of the district will...