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MINING AND MINE METHODS.
<br />1'lorlc i.s J?e:ing~ carried orrat ti?a present time in No, 7, tunnal
<br />underneath all oJ.d worl:ings.
<br />TUN;ILL.
<br />210 7 tunnel is the main •:or.'<1rtP; i:unnel. There is a building
<br />over the mouth, wit. a gaa.oline erl~;iue in tine same. mk?ere is
<br />an upr.,ise tc the snrfaca from this tm'nzel, about l00 i'ee~ r,
<br />t o:~.
<br />the moutk?. Gt a poit:t al~cut :00 x'e.a-t the;,• cut the vein, and i'ol-
<br />lo•,red 1± for several hundred feet. The vein in tha breast of t:~ie
<br />drift is ai~cut 8 feet vride, and carries ,•;ood values. 'r_~,e~. al,~o
<br />put ent upraise in this vein, that cm;nects vrith the 3rd, or roc
<br />a twtnel, T.ha raise is $00 feet, and to tvro-compartment, c•ith e
<br />p;ood Earlier-vray in onFi, arut tha otP:er used for an or^e chute.,
<br />Tl?er•a er•e statios?e at every lOp feet, a~:d a 1^rizlev made of l~p
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<br />by 2 ina? iron, placed over Lice c:.ute-nay, to catch all lathe
<br />rock.
<br />'1'~ e buildir~t;s ar•e of vrcod and are over tkre mouth of the tw:neh
<br />In the absence of sufficient dcors to prevent the entrance into.
<br />the tunnel, of noxious r~;ases, i.n case of fire, I have ordered
<br />then put in, isrk?en r,ortrleted tne~ c;an be operated from rrititout.
<br />The or•e is e:;t'rar.te:d by ovez•head ..tcpint}, and nuzc_~ine ;tnd
<br />einp;lo h%tnd ctrillinf~; is employred,
<br />The timi;eri.n;~; is rlona i>~. ;mans of squsre sets and is sui'fi-
<br />cient.
<br />Mire timbers aro of red aril ~.r,aite sprrce a::d are hr•eparoci by
<br />hand, '!:_?e,r at•a itr rood co::dition. 7'he c]'tutes are loadccl by 'nand,
<br />T~:e un!ler;~;r•ound trarm':it>r~ is d.uo by ntearrs of ir•ou curs,
<br />loaded from c;<utes. The ci?utes hrive drop. doors, made of k:eavy
<br />boiler Plata, and bolted on to tine sides of tiro chutes. 12 lb.
<br />"'1"'-rails aro t;ssd on >Crar;ks,
<br />Strfi'i<:iant velailatiou i:: obtai.uod titroup;i? the tmutels and
<br />upr•alses. PTo noxious ~,isas aro rest witl?, ;rrrc] tha sn~titar•y con-
<br />ditions arts ~,ood,
<br />The lovels are connectr,d ith mean-vraye or vrinzes. Ths mine
<br />has mono thr,n the one exit i'or omployss as fol:lotvs.
<br />From Tdo. 7 tunnel, ~ tl?rottl^h upraiso to sur:t'ar•e, and i'rom this
<br />name turn?al, throulgll tho two-comptrrctPOtrt upraise, to Pfo, 3, turutoi
<br />The urrdsrf,round 1l/;ictarl(: is de.n~~ b~' eleetr•ieity,. and ecatdlom
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