Arizona republican., 1916-05-07


 lower grade gravel. of still greater | area. and farther from the hills can i he worked at a profit also.
 owing to the gravel being cemented | the gold is fairly in many parts evenly distributed throughout the body of gravel, which varies in thickness from 2 few feet to so feet thick the min mum value of this gravel as whole being placed at 30 cents and the max imum value at about -$20 per yard. The later on the bedrock runs, and be- meath tbe virgin ground. or beneath the many pillars still left standing by the original discoverers and workers of the ground. l have seen and sampled grave! on some of these large bars that gave an average value of 2. cents per cubic foot. This seems hard to believe. One would naturally think that this character of ground could have been previously worked at profit and in small way. but to illustrates:
 A man sinks hole in the cement; he must first drill with hand steel blast and then hoist to surface. This
  ceeds to pulverize this cement by hand morter. Perhaps he averages or . cubic feet per day. As the dry washer (the crude oneD saves less than 80 per cent of the values, and as he can not pulverize cubic feet in a half ! day of sufficient fineness to save even SO per cent, why he makes less than sl rer day. This on ground that aver ages S6.75 per cubic yard. He has worked hard all day and accumulated { perhaps q worth of gold and as the 50 cent gravel can he worked at profit. as has been demonstrated by the large plant. it can give an idea of the possibilities of this gravel if worked in quantity. It is q well known fact that the placer fields of the des- ert contain values far in excess of the ! so-caned low grade deposits of cal i that are being worked so successfully 1 Ivy wet process. Yet no method here to:ore has been devised. and there has been many experiments whereby suf- ficient yardage could he handled eco nomically. and sufficient saving made. a sufficient profit insured to i justify the outlay of money necessary ! to fully equip such q plant.
 There is nothing new. that is abso ptfelv new about this "Quinner-S Steb- 1 bins plant but rather combination of different parts ali of which have been proven a success separately at other places. The plant consists of "Quinnerr pulverizer. "Stebbins' con centrator. together with the necessary din-trams or cars. conVeyors and other attachments, together with digger etc ! The "Quinner" was the invention oi i Max Quinner formerly of Old Mex leo. who worked small Mexican dry machines in connection with il. II
 nroyad such a success that companies
 soon began the installation of these
 n9chines. when the revolution drove
 them out.
 The "Ouinuer puverizer consists
 of a cylindrical drum rolling upon large shafting. the latter having mum 1 ero1ls steel slugs Slung on chains IT ! spiral shape. This shaft reVolVes a
 abou; 6C0 revolutions minute. wnli' inc drum revolyes in an opposite al
 ree;ion al some 400 revolutions pel minute and Tn an opposite direction
 inc gravel passing first over larg
 ">'. griz1lv on a bin above the machlnt Cement fed into one end is quichl : Di,lN-erized, the fines dropping througI
 the drum to a bin beneath. while tn bouiders are thrown out at the othe end with terrific force, and perfecti . s,oooih. \ two inch rim at end O
 drum catches al the real heavy soie ' The fines are then taken by elevator ,o a bin located above the Steboin Sr, concentration The waste materis u from both the Quinner and the Sten : b,,s are either stacked or dragge J ,vsv bv either swinging stacket a drag line tram. The Stebbns dry concentration the invention of Mir. Stebbins. whos nlqnt is now located at Los Angele s c,t This concentrstor is conceded To re the very best thus far invented It c. dry york one cannot concelVe "hel' Is b,. if co,,ld be improved upon, e. Il e saving qualities When the dlrt e nerfectlv dry it makes % per eel le saving. In lead zinc it's separation per cent It saves parucles oi so Is of such minuteness as to very easl ,t hIov, away by puff of wind. IT h Stebbins company puts out q sma l. had or power concentrator for vol 10 ,r 2, small way. The writer has set J. this in operation, as well as the lai 1t one and il is marvellous mNehti' B. for Jrv work. About the only pia In tbat inc writer knows Of at prese y. ulere T complete Stebbins plant IS SC \ oneration on lead zinc ores IS al 'o' r. Springs, Nev. Here Sf5.ooV wet pia ,h was discarded for a $25.ooo oteooi Inl drv plant on lead-Zinc ore. making re larger saving and nearly doupiing rt, fo,mar capacitv. The writer knows l. several of the larger tables peihe uS B. very successfullV on old lead ouihp' CT The large tables are 12 inches TOT w and they work about on the same pi | ut cinle as the placer miner handles he gold pan when banning dry that he win a longitudinal motion rather !e ly l,v on the back motion this "i''
 rloucr beneath the machine cohs
 tutes the makeup of this dry cohce lie ,rator The openings in the ta'
 where the air enters consists oi o.. te | lits so arranged so that the blast l'' IT, the blower travels upwards anu o' or the table. The gold values worhi ,er ,Ionc inc upper rifles, dropping "' ty. o,e to the other until they drop ize pto :, receptacle at the end ot ta1 he rbe seconds which contains fhu tat n,oct. sands and some fine gold IS cs tarl .ls ,onond rifles to enu