Ellsworth American. [volume] (Ellsworth, Me.) 1855-current, 1880-01-01

lead occurs In a compact granitic rock, which
Is apparently devoid Of cleavage iamiaation,
then Il IL liable to be what miners designate
''gash vein," or merely surface rock-fracture,
without profundiiy OF depth. II however, lead
occurs In . true fssurc, between walls OF
metamorphic rocks In which the lines Of cleas-
age are palpablc, then the lead will extend TO
. short distance from the surface, and finally
disappear altogether. As rule In this eoun-
try, the ores Of lead are nearly always asso-
ciaied with silver. and the actual working OF
the si,ver-bcaring lead mines OF the globe. has
clearly proved the fact that, argen,ifeous de-
posits were the first precipi,snis in the
e.rth's deep fractures; for, as stated above. the
lead ores nearly always predominate at. and
near the surface Of the lode, but gradually fade
out ~ depth is attained. and finally give place
to tn royal metal. Now. As the Grant, Ike
IL ny other mines In this region, 10 simply an
sTgcn;iferos,s g.i.na deposit, we may reason
ably conclude that silver will ultimately be the
predoninating element in the grea, ore chan
nels. I, Is further a matter Of encouragement
to know that. As a rule, all Of the refractory
elements and base metals which usually occur
al the out-crop OF silver-besring veins. are
merely superficial deposits, which almost in-
variably disappear al slight depths from the
surface. Many of the most productive silver
mines In Arizona. Colorado, Nevada and
Idaho. were exceptionally refractory at and
near the surface. but ~ depth was reached In
the Iodes. the base elements entirely disappear
cd, leaving 10 the mines rich deposits Of free
milling ore. of silver and gold.
The present working appliances al the Grds'
.Nae are As follows:-A vertical shaft eight
feet four inches, by four feet six inches, In the
clear. The shat, has reached the depth OF
forty feet. and will BE- driven down I'LL !, en-
encounters ledge number one, NJ tbs probable
depth Of IS. or ~ feet from the surface. At
that level, the Intention OF the Company IL.
10 Gu, both Of the ledxe., by horizontal cross
driil from the shan. The shan is substantial
Que ani Is protected BY frame building II by
= fec,-onc story high. The blasting work Is
performed in the usual way, but the Company
has pruden;ly brought into rcquisiion gal
vanic c1ploler. which h guarantee agains.
blasting accidents. The Company has secured
= perpetual mineral right 10 = Large area Of lsnd
surrounding the property. so that there can
never Be any Ganger OF being crowded by
obtrusiye neighbors.
In concluding this Report, deslre TO ofer a
few friendly suggestions TO the owners OF the
GrdHt mining property. Tia, the present
prospect Of the mine Is highly encouraging
canno; be questioned; but We must not loss
sight Of the fact that the most nsttering sur
face nlications sometimes lead 10 bitter dis
appointments. No living man can predict
with uncrring certainty, the conditions Of !
mineral lode n, une1plored depths. The cx
pcricnced scologist may arrive At an approx
mate conclusion As to the possible future con
diiion. of the vein at profound depths, but h.
dare no, assume the role Of prophet aud al
tempt predictions. Seeing then, the utter i'm
possibility Of foreislling the conditions Of Al
une1plored mine, Il bchooves the owners o
such property, TO 20 slow-io be prudeD in th'
expenditure Of cash and labor 10 guar,
against undue eIe.tcments and TO eIpend NJ
more II oney for machinery than IL barely nee
| essAry - prove, beyond doubt, that the min'
Isl * a8s Simple ana hiefpen,iSe xay. an,
when 1t shall be soeomplished-an no, Ill
,hen-,he Company will be warranted in .ecur
ing the best aud most costly ug appli
| Ances.
Yours respectfully,
W. +. STEWART. GeoIo9iH.