Show THE TIIt JOHNNY 1011 jOl MINIS MINE n H linn has II lI clI and l Is h Dono nano no nt nl Tills Hilt Property W A Scott the tho well known mining miming writer In a n 1 contribution to lo the Engl I ft Mining Journal I gives the follow following description of the tho Johnny mine mille mill at al 9 Tho Tine vein vain oln Is ts crossed diagonally by hy and dykes At AI tho Ins In are lire tho the strongest oro ore boll bod bodies Ics ies the Tho ore generally averages 4 feet teet In width though thought some soma shoots are 16 I i feet wide rho Tho gangue ganglia consist of I I porphyry The fhe values are me prin principally gold Holt and 1111 silver The main shaft IH Is down feet and lIn drifts have hlo I been run on the and levels levela mak makIng I log Ing In SO feet feel of development on the thc vein eln At a point r 70 0 fc f feet t west of the main shaft an no Incline has been sunk feet teel on the dip hip Pumps on an tho the third level leveland leveland and In tho the Incline keep klep the mine clear of ot water and furnish more than Is IB required re reo for mill work The oro ore Is III dumped over n a grizzly thence goes goeR to a n 1 McCulley crusher that reduces It to n Two bat batteries batteries teries each stamp weighing 1031 pounds pound and dropping 6 Inches per par minute reduce the oro era to pa pMS pass 1 a 1 No 0 diagonal slotted screens equivalent to 40 mesh each battery Is an nn amalgamated plate pInto In three sections Tho recovery by b the tha plates plate amounts to 70 per cent of ot th the gold Kohl and ft a f small per por percent cent cAnt of oC the sliver silver Th lM pulp passes from tho the plates plate I through quicksilver traps to the cyanide leaching plant The panda Bands and lImes dimes are arc separated by hydraulic IzerA and aM are arc treated In separate vats tats Lime Ilme Is b used u to counteract acidity and aids In settling nettling the slimes The Tha Th sands arc leached 18 hours In a strong ohl solution lion tion then 48 S hours In a n weak solution Tho The slims slime tanks have cone shaped bot bet bottoms toms tome and antI the slimed Mimes containing 60 per percent percent percent cent moisture are ro treated with cyanide solution the tho contents of ot the tho vat at being kept In motion mollon by Jy a 1 centrifugal pump for tor two hours The contents are lire then thet discharged rl Into a wash tank lank from prom which the gold solution Is drawn oft off to the tho precipitating room The values re to recovered covered In the slimes consist principally of ot sliver silver Tho rho consumption of cyanide amounts to Hi I 1 pounds per ton of ot ma mil material handled The total recovery Is la about 86 96 per cent of ot the he gold and 63 per percent percent percent cent of oC the silver |