Show MINE AND SMELTER BUILDING the kelvin calumet copper company of ray arizona has decided to erect a ton concentrating plant W B twitchell is the superintendent A the neosho property at ouray colorado will likely be equipped with a large plant of machinery in the near future the work is now being done by hand the philadelphia copper and gold mining milling smelting smelling Sm elting company operating the san vicente mines in the ameca district state of guadalajara mexico will put in a ten stamp mill and concentrating plant the proposed new plant is preliminary to a smelter M J of philadelphia is the general manager for the company |