, 1879-04-15

10 ho tllc ca,tse Of final abandonment than h,.,
ms The hitter affcrts all tn. nllhes. nnJ IA c..t'
to tncrcas1 with depth Prof. John 4. Churea,a
mining cnclnccr who wns connected will H..
Lieut.. Wheeler, baa recently prjntcd a iss.nress
delivered n Columbus. o., in May, 1878, % X.
"tiea, ol tho C0n,stoek Mlncs,n giving ,hc w "
suit oi a careful study Of the Conlstork. III
which tc bcxlns by saying tat "ono Of IT, IT,
most striking, plcnomena connected viii is ihs
,nlncs on ,te Ctnstuck lode Is tho c4trcme he.ss hs
encountered TT the h,Her levcla. The hen y
not tuo to the burning OF CANDLES, 1leat Of H.
,,lo!', a19f dcconpositon Of tlnbcra, all in,cnss
H. ts srase Sx h vsita' Il n4ae. % s he eass
,I,aininins constantly Temperature very ,nc, ss
pllcrc In Nevada. THO leat Of these rMus. mInc.
Is 1nntter of moro than usual int",s.
III the Untud States, md both III tic pfc,eNt
temperature encountered nr,l III tue sIlrrr.'ss
which Ia u, ho expected Us grentcr depths ars
reached they anpear t. surpaes any fureino
Ing to tlc greatest ben: In tLe 'hot ,alaesaen1i
Wales, where the Temperature Is from lO) d..
grccs to lib dcgrccs Fahrenheit he sRys: WTSs
rock IN tho lower leyola uf t1!e Constock a{uss
appears To hare q pretty uniform telnpcfatm,ss
VI l30 degrees Fahrenheit. THIS was tiic feaS.
i1is obtained lot sne on several occasion, hy
A!f Co1!1stock, foreman Of The Ophlr Ming ma
nb0ut the satlle temperature was found bv H.. IL
Ierr1n, foreman OF the Chollar- Putost, Nv
Gosgrovr. foreman OF the Yellow yaclset tlssx;
md bymysclt In ,lic Grown polnt mud ofheTf
m!nct.n by Encans OF ycutilating.pincs Of ral.
vnniZed Iron, llsually eloven inches In ,liamete,
couler afr from sIle surface Is Introduced, and
the tctnpcrature Is thus reduced 10 ITO icrrerss
TO I'D degrees Fahrrnhcls. hut these u'pes A.
inefficient yrntilutore, as they become heated bS
eoIItAet with the hot rocks and mir, duluitLIn,
In efficiency With length.
fhls great heat Of tl.o Comstock wns obse,,.a
~ Clarcncc King several ycars agu, and was A.
Etncs lave always been troubled. Prof. Church
does not nccept this theory, nor tho theory thst
1t Is due to the Internal flcnt Of the earth, nor
TO The residual llcat of ti,u rocks witch Wefs
onSc @ meltra, hut 10 refers It to tho chcueai
ncl!o,l 1low maintained III the cr1iptell tockr
rue average temperature Of the wutcr In tle
deep levels Is, he says, I'll dcgrces,- htpbr,
tl!an tlMt OF TIC nlr Or tho roeks,-whie SON,
os the tiottcst mines arc free from wafer, III
thinks IL Is tue rock tliut heats the water.
Fru1n a surles Of observations le reachc, III,
conclusion .lat the boat ts increasing with lcptb
al the ratc Of from deg. to deg. Der loo frtt
C!arenco King writing it' 1SG9, Eayes the aver.
age tcniprratufu To0 feet below the SURFACE i,
stface 81 io der pfoi t chec 1 e' IN ,sy Gs,sT i 4
gives thu average On the I, ,000foot levels as 1A
de1. to f10 tleg. At this rate the 3,0O)-foot lef
cls Will shaw Temperature Of from 150 deg. 10
1s0 dcg., which by auy method now IN use caa
not be reduced below 1870 deg. 10 10 deg. Ia
eueh temperature 1t will be almost imp1ssIb|s
for any 'l.an to work. Al1eatly it requires sey.
cral ncn to do tht work OF oilc man In the IN.
per 'evels. Wlicd we reflect that the deepesI
metal mine nu's ~ oncratlon anywhere In ths
world Is but 5000 feet In Dohe,mla), and tjat
with temperature OF only 10 deg, whilt ~
u1Iacent nllMo has been abandoned at a ,lat]a
grentcr depth on nccount Of beat, we cau s.a
tue i,nportancc Of this question Of heat III Mt
ton to tho Cunistock Alincs.