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<br /> MINING AND MINE METHODfi.
<br />/ In S11ver hake tunnel, about 1500 feet f'ro the entrance thorn is
<br /> a three-co8nl;artrnerlt shaft, •15C feet deep, timbered with square sett ~',
<br /> It is equipped vrith a 100 ::. F. electric kloist. This ,,:eu't is con- j':.
<br /> nectod ':litil 1Jnity 1'fiidway, at a depth of n00 1'cet. This level ~~~'
<br />i,
<br /> leads to the Unity C'.lm:el throuE;h v/inzes about 300 f.'t, lower. ~'~.
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<br />In this silaf't t
<br />r•e aro i'our levels, b:no ,n as A.H.C. and D. !
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<br /> The letter~drif't il{ Silver Lake tlumel is almost a mile
<br /> lolly;, and is driven to co:vlect by upraises Yritk] :;i.lver Lake IIasirl. '.
<br /> ;7or•k is being• car•ri.ed oYl at the present tinge in "ilver hako
<br /> tunnel, letter 0~ ;Alit;/ T:ichvay, and 11YliC,y tullrlel. Letter 0. is !
<br /> in rlevr ground, and in t:^.e i;evr ';`crL artd Silver La1:e veins, it is
<br /> a continuation of t1'le old crol9:illgs. ~
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<br />The Cmnnally :ras an up-to-date map of a1:L ul:deY^,,r,round crorlcings. I
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<br /> hoisting is clone ily m".arls of a ca,•;e, ar:d t:'1e ?loistii78 l:achin-
<br /> ery is used =or file k~oi.sti. nr; of bock: 'ne ~! ~.: ul *urt°^•i.al. i~^-e ,eight
<br /> h
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<br /> of load hoisted is 2 tons, ar•.d t1•_r~ dirn:!ll:ce .foisted %:50 feet. I
<br /> i';:e caLle is a %~£l .,feel mire rope, il; good c:ollditioll, and
<br /> _...., been in use 4 to 5 ~year•s. It: is sECUred to the cage by means of
<br /> clamps vr:_ich vrnre clr~uu•ed al;out sir. 1rIwlChs ar;o. T:^© cngo is eq-
<br /> UippOd V13.tL ^uaf'ety ClUtC!1UU, Ullt t.'e l'e iv :':0 (le V].UB elnl)1 Uy ed t0
<br />11i-
<br />;revellt ovs :^crituiiug. 1:~'.at erial is ho i.:;ted f'r•orn t'.;o or mo r•e levels, su
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<br />"1'~ :md tL car~•cr is emplo~JOd. '1'::^.e be1.L line i.s a l~'d inch hemp rope, . j Il
<br />em-
<br />a:d file Stato Code, 'veil:(; tkee ogle 'lr aso, i:. posted in the eur;ine
<br /> at shai't al:d in each level statiml. Pin order, proLLbitfiYg
<br />room
<br /> ,
<br />:ept
<br />peT•sc.^s 1'ror.: riclirl~p on !~, loaded carve, is posted near tkle collar '
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<br />tho
<br />oY t's<e s11a1't. Also a. ~loti.co stnti~,:1- tl:c: maarnim n:nnller of men per- 1
<br />'er
<br />:11itt0 cl t0 Y'1Ci0 UpU1'1 the Cal!;e at Olle til'le, is pOC;tE;d at th0 CO1.Lar
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<br />ut 200 1;4olaruo-l cha.lrs Iat•e cnlplo od
<br />of ti.e ohn:Ct a11d at oa.cill level stuti.ou. Y '
<br />t ie io1• cage, and tho ~uicies are 4 r. ~, Or•er;on ping. "~.l:L level ntarCJ.orsl 'i
<br />d.
<br />ar•e lr~,'ovided erit;k', passal!;e vray arcnnld vrorkinp; sllnit, and the eilet'I:'t
<br />~. i'.
<br />atsY• at al'1 stations is provided t'ritll l;u:lYxi rails. 'i'i1e shaft is socursd l'
<br />ilk
<br />
<br />iUles
<br />by a pillar of p;r•ound upon each lido, nlz'1'flciert to sacure saf'oty, .
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<br />argil sld all vrinzos or mild holes aro surrounded or prcvldod rri,th govarv 'III
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<br />O2" L;UtI Y'Ct rail6. Tl'•e 61"!aft ifl 110t bai::ig U11111:.
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<br /> `1'l1ifI1P;L.
<br /> `il"1E1 ^i1 VO T• lakO tL11111~,1 iH 011 1ll1 c'1~Vf1t iU11 01' a~JOUt `~Q~ 1'08t 0.1)OVB '
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<br /> tk10 lnlit;J tUn1101. TI1es0 t4'!0 t1n1Y1018 Ore CUIlY10 L't Od by a ellaft 1Y1
<br /> uilvor I,n$e Tulluol, x160 foot doop. AYId '1'1'• Im Chars clown, b= QR___ •,Y
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