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Show 40 IMMIGRANTS' .AND SETTLERS' 'GUIDE kinds of chemicals are fo d . ~el? are great neutralizer:~£ t~ the ore, and. some of wmg to these in some o power of quicksilver p::trt ~f the gold 'is saved in rt1:' not more than a fourth phur. ~~ found in abundance a ~ ~~J:?mon process. Suito mmmg~ ' n I IS a great hindrance THE KEITH PROCESS. Dr. Keith has undertaken t . first pulverizing and the b o ~aster this difficulty by P h ur au.tor rdin• O' th' e combuns fblu rning the d ust-the sui-furnace with o an esca e fl I e agent. It is done in a runs up the mountaiJ sid:e to create a. draft, which further consists of . se~eral hundred feet It 25 a Jaw workmg fi · strokes, crushing the dr or on .a rame at about veye~ by a tube or trou h y e, which is then confan- mill, fitted inside withg th ~o a close,. narrow sort of crushed ore is introduced . Iee revolving arms. The speed throws it out along ~1:: the ce~tr~, ~nd the high fine powder, when the draft ar~s till It Is reduced to it through a three or £ ~au~e by ~he arms carries h~ated to an intense heat.o~h~~ flue mto a ~urnace, Width ~f three or four· feet -an ue tpen. expanding to a a slantmg direction down a to one foot m height, takes of 45 degrees, all the t. ' h ut 10 feet, at an angle The sulphur is separated fr~me:~ed ~y .:fire ~nderneath. at the bottom it is sent throu h e OI e If! th!s flue, and of the flue, another flue ~ an opening In the roof first, and so off into th pa~sing along the top of the ore f~lls into a pit, wher: i:Ir, 'rhile t~e desulphurized ~ubr~utted to the action of u1~~ ~' and IS t~ken out and Is said to be satisfacto ry. q silver. This "process" APPEARANCE 0~ THE ORE "All that glitters is t , . us~ally of a light re cofo gold. The gold ore is bnghtly in the su~; rnd r:~ ~any particles of it shine andsome specunens to TO THE NEW STATES AND TERRITORIES. 41 carry away, but these are not the precious metal. That which glitters is not the gold, but chiefly pyrites of iron. PRODUCTIVENESS OF THE ORE. The Hon. John Evans, Governor of Colorado, states that the ore in most of the lodes now worked pays at least $36 per ton, while in some instances the same quantity yields $150, $200, and even as high as $500, treated by the stamping process alone. This ore yields upon analysis from three to six times as much gold as can be saved by the ordinary methods now in use, giving results which to the inexperienced miner appear almost fabulous ; but, of course, no practical conclusions can be drawn from merely chemical analyses inapplicable upon a large scale. 11le practical proof is in the actual yield and profit to the miner. The cost of each ton of quartz may be fairly stated at , $12, and the yield at $36, thus affording a profit at the rate of 200 per cent., and that, too, in a manufacture or business where the returns are unl?-sually quick and active-the various operations of mining and crushing the ore, extracting and selling the gold, being easily performed within a week. - TOTAL PRODUCT OF GOLD. It is a difficult matter to give in figures the amount of the gold product of Colorado since the coiilihencement of mining operations in 185 8. No sufficient data exist for the computation of the whole yield of the Territory. But an approximate estimate, based upon various records, can be made, which affords a gratify .. ing exhibit, and from which fair deductions for the future product may be made. The reports of the r eceipts at the Philadelphia U.S. Mint show the following figures : 1859................. $4,000 1862 ...........•... $6,000,000 1860 .......••••••.... 600,000 1863 (estimated) ..... 13,500,000 1861 .....•••........ 1,000,000 1864 (est imated) ..... 20,000,000 |