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Show I oo 1 MINING FOR GO LO AND COPPER ON A TREMENDOUS SCALE. Mining for gold and copper has become be-come an industry In which each per cent of copper and each fraction of an ounce of gold Is made to yield the utmost of profit. There was a time in the earlier mining history of lUoh and neighboring states when silver, copper or lead ore that yielded yield-ed less than $100 in metal values could not be worked at a profit, when $50 gold ore was as valueless as porphyry If not free milling; when rebellious, ore of much greater gold contents was worse than waste, and when less than 16 per ceut copper was found, the material went over the dumps Today (he heaviest producers of copper, known as the porphyrv group, are making big dividends ou material running from 1.2 to I per cent copper with a saving of only 22 pounds of copper lo the tou. This ore Is mined, transported, concentrated and smelted, smelt-ed, and finallv the copper Ingots are shipped to the Atlantic and there treated by the electrolytic process On ore of this character the Ltah Copper company is making a profit of from $6,000,000 to $10,000,000 a year. Up in Alaska a new gold mine la being opened on a scale beond anything any-thing in gold mining heretofore attempted at-tempted A vein 70 feet wide and extending a distance of three miles contains approximately $1.5u a ton in gold This ore body is to be mined, transported and milled at a total cost of not more than 7G centB a ton. We doubt that the average teamster team-ster would contract to haul the rock from the mine to the mill at that figure fig-ure The low costs are made possible by the latest methods in mining and I reducing large ore bodies The ore will be extracted by what is knonn as the caving sstem There will be no hoisting, timbering or pumping, the ore being hauled to the surface through a two-mile tunnel in v. hicli an olectric railway svsteni will be operated. In the reduction plant, ultimately ul-timately 20.000 tons of ore a day will be treated, or over 7,000,000 tons a year Even at that rate of production produc-tion it is estimated that 20 years will be required in which to extract the ore now In sight The opening up of this vast property proper-ty will give to Americans the largest larg-est gold property In the world |