Eureka daily sentinel. [volume] (Eureka, Nev.) 1871-1887, 1874-04-16
REKA DAILY SENTINEL.
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EXCEPTED, ny
no. w. CASSIDY.
TERMS OF SUBSCRIPTIONS:
l.ry. onc year, by mail. on
E,ry. six months, by mail. . ~
Scpy. three months. BY maii:........... W
rRE VEINS IN STRATlFIED
ESTONE WORK Ed 1000
tcEr DEEPER THAN THE


rOMSrOCk.
enry Sewcll. in the Salt Lake Gazctte.l
ayjny had the management of sill
mines in Chilli and in true fissure
ls in stratified limestone fOrma-
s. for about eight years.. subse-
(ntly also for two years in Mexico
Spain. producing precisely the
he class OF ores as those Of White
.-pamely, chlorides of silver,
ed bv practical miners horn silver
beljcve Il few observations and data
he above formations may be found
mil i'm furthering the interests of
Ies in like formations in the United
les. for until recently, comparative
speaking, they were rot known
he experience in silver mines in
fiticd limestone formations in Chilli
Is back as far as lS0S, at which
iod the silver mines of Aqua Arma-
proyince of nuascO, were discOv-
The celebrated mines of FL Doc
in Mexico, likewise in similar
nations, were worked for about 30
RS. and produced some $4,000, 900
rth.
Nose of Chilli were vigorously
rked from lS:'6 to 1913, and kept
ne T. mills constantly supplied.
I crushing was carried on by So
q ell Chilan mills and the patio
algamation. In 1888, Mr.. Stevcn-
o an English gentleman, was the
III for making All improvement for
V1rking these free milling ores, and
rented the tinas, or pan, system of
alganlation, which was exported
l6m Chilli to California in after years.
ervwhere | have noticed that these
1nnationS produce free milling ores
surface and to Il depth varying
N 80 to go feet. In one di>tric
nc in Chilli, callel Chan ,rcillO, it
a>certained 10y the dues paid to
Government, that the amount Of
ver produced from these formations
about l. wears. reached the sum of
,0O0, 900, and this from the free mill
ores taken from surface to the
pth of 80 feet.
bout the wear 1919 these ores gave
niple,ely at the above depth, ami
% most sudden way, most diScour-
In 10 every mine owner, so much
u that the Government gave them
I've to "diSfru,ar,' or take out all
yIe arches or pillars that the mining
e> enforce to prevent the mines from
wing in, AMI this is only granted
Der the Government mine surveyors
I've officially notified that the mines
1ve ceased to be productive.
ohn Sewell, an English gentleman,
10 had owned one of the above
mes for some years, and having
de a large fortune, was 10th to aban-
it, and determined to solve the
kstery. He noticed not only the
dden disappearance OF all trace of
but Il sudden contraction of the
IN from 4 feet to about inch, and in
hny places IL thin cleavage of not
/ bre than one eighth of an inch. For
! 10 or three years he continued his
1tplorations; levels, wines, ETC., We're
4ivcn, but with the same results. not
Brace of silver in the punched part of
e lode. Later on the same applied
4 all the mines in the district. Sink
Is was continued till they Went
Trough about $50 feet nearly perprn-
lcular, say Sio, which was the under
of the lode. At this period of the
1Ork he waS absent in Europe (fOrtu-
htely), which induced the manager OF
De mine to continue sinking for two
4onth> longer. awaiting his arrival to
andon the mine altogether. Within
e above short period this narrow
eavage, or lode, changed as suddenly
it had disappeared before, to a width
six feet. This event took place in
ol, when the writer of this took the
management of the mine and contin-
led therein till 1857. The ores in this
eew strike changed completely, their
pmpo>itionS mostly being ruby silver
res, without any trace of free milling
res. We have in Chilli exactly the
sme change in the copper mines, from
ee smelling copper ores tcarbonates
na SilcateS, ores that can he sinelted
to par copper in one Operation) into
niphurets, under similar conditions OF
epth.
Al the depth of about 900 feet, where
PC sudden expansion of the lode took
atce, the writer extracted ~. tons of
a'i'e silver, which produced 30 per
M.. OF their weight in pure metal on
sihS melted down in the bar furnace.
nis kidney OF native silver was sur
GUIDED by masses Ofpure ruby silver;
IONS ofthis ore was shipped III 1851,
+! lne brig I.lewllyn, for sale at Swan
u, Wales, and the average per ton was
Mo' or *SO0,0O0 in all.
NhlPments from this district contin-
en ior about four years, and the cal
4a''onS OF ore shipped to Swansea
eIe about S25, ,0OO,OOO. Up to the year
c'' nothing was shipped that was un-
Nj 9"o ounces to the ton. This was
,od,lced III the second bonanza, in the
sIIa,illed sI',illed limestone formations; and
| nNllever in White Pine Pockets" will,
i,,,cy al,cy, he somewhat elated at these
,"le ".a plgmy items, which may prove
ppSe'ui p;ei Tor future guidance in White
i me- The sudden transformation
n1'n ,"'' Tree milling ores to native and
MI: ;s SILVER ores at a depth OF 900 feet.
'''ced ,"o all the mill owners to try all
mai a'iier me, OF experiments as to roasting
"a frou' 'enioridizing. They had graduates
wo', ' freiberg. AS also practical men
rr rei Ver>ed in this branch of metallur-
en, en, o'lt all these failed, and in conse-
,aae'ce h.a the ores We're shipped to Swan
limo.I ~ Is evident, then, that these
fba formations created amongst
ta,ionm G smeltess in England u great repu-
claso ln me highlands Of Peru, in Iauli.
Ao>t Whnro Io NJ