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!' Santiago Tun.-b. .?-.r r;i' o;~eitJei:r,
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<br />~~ ~S M ~::$rI•,II G ;; & ;~ M I R E •t M T T H O D S- Contin.
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<br />;I ` ~ The,;oellsra; ot.the~,ahatts: ars o~,;eutiioient~y~eight tot,
<br />~ ~I pregpnt;persona tr4m,;tr~ppiyglPnd„Yalfing,ia.,thp ehett and ,,,
<br />'i I:
<br />~i i~; !~ ~ _ . arg provided siith,goVd and ,en~iiolent,,doare[t• prevsntt~ma[ter-
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<br />i + j~,` sal iroa falling in the shaft Rhlle damping. ,,~,,;_
<br />~f I !
<br />rl I 4 .- Se vrark,asrried;;on-ln,the shatt;;at thie,,time„and~no
<br />~ heisting dons. All material is trammed thropgh.the[,,tunnp}„~
<br />ii ~ '
<br />•~ ! The method •Y ors extraotion ie evsrhand eteping and
<br />~I III` driitiag. Bo machine drills are used wind `ningle~"head drilling
<br />.. 16,denQ.r;.01,.. ~ is ,~; , ,)~::
<br />~ ~ : , , •, ', The, tpe~~[sde, emP~l~yed tor_timbering are peetp and oapn,,-_
<br />' -,~rrtnlls.oovpred;with;laggln~;exd oribbing. The;,timberslar~e ~~.~
<br />prepared,by;hand,•Yrem Pine and ,eprue~,;axp,.in goPd,,oea~ditien
<br />: :and. euiYioipst,.., in._quentity, and_.ize,.to„ asourp ,eaie;(:y,. ,,,1 ,; ~;;
<br />..~_,
<br />;. :.; ,Qh}ttperarp,loaded by, hand endi.erevity.,;,;.,; ;,;c:: rao'; .•u!a
<br />-: , :.•Undergrpund,, tr,xmmiYg,,is ,SlPne Eby, hand with at~,el oars, ~:,:
<br />~' •i, the• mine, aad, gmeltnr;;typp„Pn a; traokage, ~t•.l~rt) g~g~,,and,n
<br />lII! 1~,T;raile.,,,•:iJ ~.^. +. :;; ::~.::~ ;,r[.~.,.,,_ .a:,;:~ ::;.~: ,f::cq [iaty; (ou7~
<br />1 I ~Phs ventilatien,is natural and suftioient.gn~. no nib
<br />_.. , ~ )... , ir,n
<br />~:i~
<br />°, ~~ ,, ;,-ions,.gaeps; are aet;with.,A].l,ther•werkinge nrp oP~nepte~d by
<br />~i .I,I .. steppe; and :upraises. r.: t ,,': ° ~ ~. .~ ~ .;; ,:.r "c) .:o;;.t~,,i .i: J,'
<br />~~ .I ..
<br />!i I The •drainage,;le,;xaturp~lf ap. all; sir ,tl~e •tunn~lpr Rjt;~ dr~.v
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<br />l •, en: pn: a~~unlYerm grade; ~Y.,1y6., On],y ;~,,pmall, wppunt, •1' wst~rt,i~,
<br />, ,sno~unt~xad,•~t:, ,~, ;..c ~ ~. ... ,.. .,.r:, , ,. ....:i;. ,. . ~iiB.C [t;1'unc:
<br />,; A7,1;,old;timperP, and,;del~rie: have,;bPett .removed .Irpmt;tu}der
<br />-grouxd,;axd ~~ths,; sansLary,.aeudi~tione,,,RrA;,gPod.,_, ;, ,,,, ,,yr 't,,,a
<br />All winze^ and etepes ar• kept in ~gdgd~oenditie~,., r~~r
<br />.74'J.y ,~'quipP4d ;end ;aooPsP,tbl~i ,ii aPec'<Lpit; tP,r nn,,nc~cl~itJlrnal east
<br />in oau •Y aooident by tire. ,•, p, ,, 1, ,,f ;.,,;,;.goJn
<br />,_.. .:r,:•,;^i•:;~r,~,o:; ~,.,, ~~;[[!.8!T,:~•.T:!:I:Bc:T.=r:~rg~ oa;F :a t:.
<br />~:vu o•r., Ida: na:.d 1'i,rn;n i,oo;; ^.~ ;•cn .~ .. ~Lf:'. 1);q: L'l;A'd-f 97l;iUC1
<br />-',::r. r•.[;t,Agnrpgs ~prPdlLO;t}PYl U~ ;ore,..~re~•.~n~nt]1,,~75,rtplM1,/..i,a(,r; i;r;:h
<br />M:, r,; ,: IA~srage.[YQ~ur a#, ,~8!':;peF. t!$.a,7!'i ~~i`- t{.[.t!;rc,r t,[t~: ,.Tnli
<br />Average asst mining ~f •rs per ten, ------
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