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Show If DOUBLiNG CAPACITY I1 OF BUTTE-DULUTH 1 " Estimated Known Ore Will j Last Enlarged Mill Fifty Years. 1 Special to Tho Tribune. BUTTE, Mont.. April 24- Contract for ' an addition to the copper leaching plant or the Butte-Duluth company, to cost ! $100,000, has been awarded and excava-( excava-( Hon for tho foundation has begun. Tho new addlUon is to bo a 100-colI clcctro-i clcctro-i lytic plan:. Tho present cellhouso has 3 forty-soven and Is capable of handling j tho solutions from tho treatment of 300 I tons. With the new cellhouso completed 1 the capacity of tho leaching plant will be more than trebled, bringing it up to 1000 tons per day capacity. ' Improvements have been going forward rapidly at tho plant In tho last six weeks, a Dorr tltickonor lias been installed and the foundations for a nurabor of now leaching machines are In. Tha framework frame-work 1b up and tho machines aro on the ground. With tho new leaching mach ncs in place, capacity of doublo the old plant will bo attained. Tho now machines will be ready for operation within two weeks. i The 1000-ton crushing plant Is completed. ' A new generator has been ordered by the Butte-Duluth. which will have a capacity of 3600 amperes and 350 volts. It will generate a direct curront for the cell-' cell-' houses. In the cellhouse will bo Installed i a new stylo of cathode bar and also a 1 new stylo of anode bar. tho efficiency of the new style over the old being -o per ' cent greater, according to superintendent 1 Sherwood. This Is due. he says, to the J direct flow of tho f-olutlon through tho ' cells, sheets being placed with tho flow Instead of against It. ' . During tho month of March 5.000 !' , pounds of electrolytic copper was prp- ' duced. as against 62,000 pounds In 1-eb-ruarv. The expense account for tho two months was nbout tho same. A Httlo more than 100 tons of ore a day was ( . treated, tho copper recoveries being m. per cent. Tho copper oro ran '2 per cent. ! The production of cement copper, which is collected by the scrap Iron process, was 3(1,000 pounds in March, as compared if with 40,000 pounds In February Superintendent Sherwood estimates at 1 the prosont timo that they hayo available ) by the open-cut method of mining about " 36.000.000 tons of ore, or a" suPRlytha1 I , -will last fifty years with a 1000-ton 1 , VnnU |