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Show FUTURE OF KG DEPENDS UPON THE NEWER APPLIANCES The key to the future prosperity of the mining Industry lies more In the development devel-opment and application of apparatus and methods' for the cheaper and more efficient effi-cient treatment of low grade orca idan in making rl'h flnda of ore. Thla doea not mean that no hope t-an be held out for the prospector, for lliere cen. and It I rare to say that many valuable mines remain re-main yet to be discovered. Their finding must, however, become lea and less frequent fre-quent aa time goe on. The, rich ore iMwiies are always eagerly aought and are snapped up and worked almost aa soon aa discovered, eaya Mining World. High grade ore bodies the bonsnss '-onlsln onlv a small percentage of the world "e mineral that can even now be profitably mined and treated. It la the once-desplaed once-desplaed low grade ore depoalta that are to become the bulwark of mining In the not far diet ant future. The conquest of thee low grade, ore deposit haa already begun and haa reached considerable Importance, particularly particu-larly In the case of gold and copper. It la significant to not that no high grade copper mine have been found In I he I'nlted Btates In the pest few years, but a number of large low grade copper prop er4ee eea e4wg o)eeloee) ev siaaoedi a productive has I a A bodv of 2 per ceru ropper, provided It la of large enough ae and the copper mineral la fairly evenly distributed through the rock, aa In the aocalled disaemtnted ores, may now oo-es oo-es a commercial value. Refinement of large scale method of mining, handling and concentration of tha ore has made this a possibility. I The realisation of thee result ha ben largely a victory of the mechanical erid of the Industry a It waa tha eolu-flon eolu-flon of the difficult mechanical problems Involved that brought It about. In the profitable working of tow grade, gold ore another factor must also be oon-eldered oon-eldered the Improvement and cheapening of chemical methods of extraction, not-; ably of the cvanldo process. , It Is Idle to uppo that perfection In j either mining or methods of treatment; haa vet been attained, and It la not too much to expect that ore of too kw grade , to yield a profit by present methods will become source of wealth at some later Ami- |