Show OIL IS THE CHEAPEST FUEL mining operations in arizona especially in southern arizona saye the mining reporter havo readied enormous proportions the of producing properties is constantly increasing while the old minea continue their output of metal close to the southern border ot arizona in the republic of mexico there is nt oana nea one of the largest copper plants in chef world at bisare clifton and morenci cil are employed at producing mines an interesting feature in connection with the economics of milling practice is the use of oil ae fuel it being used by several largo mill the cost being 2 per barral at this price it ii equivalent to 7 per ton for col per cord for the best wood |