The Helena independent. [volume] (Helena, Mont.) 1875-1943, 1894-02-22
ABSOLUTELY PURE

hrst generally supposed that the orc would
become moro base and the gold would
z ndunlly decrease AZ depth was nttaiueu.
/ such. however. has not been the caae. tola
continues With the average percentase IN
all tue iron pvritea. whilst the pyrites IN
crease propo tionately with the higher
grade ore The lower tunnel has nov al
vanced over 9Ol feet.
Huge bouldefa Of lively hard quart 70
vatv similar ga charnotef 90 that OF she
! Crown Point ON the Comstock lode ON
one 90 thi ee feet 90 dimensions are blasted
out car wing gray copper and rubF silver
ami with tuuches nll through OF the me
grained iron suip0ureta which contain the
gold. such spec mems will 60 40 ouuces IN
silver aud Sb0 in gold yer tom then again
10 will run l50 ounces silver and $40 gold.
I A conservative age-with al the vari-
Gus changes-i1 estimated ~ about seventy
ounces IN silver and ons ounce IA goit.
consequently Il Is quite safe 20 classify Il
As a high grade y OPPOSITION throughout
The manner Of treating tins ore D. very
important 60 the interests OF the entire dis
tficL since 10 will solve = perpleXing ques-
ton for other mine owners whose ores are
not OF grade TO justify ahi. ping. ilne 4
pAnkey have been lnyestlgati for tae year
rast and have hua ~ d. rived At plen en-
81 ely new. n not unique, and 10 VIII BE- the
first one ever adopted "a the world. 10 Is
not en- exc lmeut--for 10 has already
passed the expe imentai testa--and Is fully
81 Dcuvsr ami Butte. The sfliabus Of tho
moins oferAndi might be construed Is fol-
lows.
Flrst-The ore Is crushed. passing through
a 11lO Blake breaker.
Second Through .fKal roll.
IEl a. Through a hys-f0ct BYrar mill,
Wet crushing using tWoaty -mesn screens.
Fourth CoLceut alton % entire pfoduet
on true venue g.
FlIA--Dryiue SIZE tailings from the van
ea.
SIXTH Rosstinq tn. semi dried tailings
and introducing chlorine gas 10 release SIZE
silver nd gold from tbs sand.
th-Amalgamatio OF ths roasted
material in pans ANA settlers.
le result Is two products. VIZ: Bullion
and concentrates.
The idea Of roasting the tailings after
separating the concentrates u quite the re-
vers. OF the process en- Logged Ia ohlOTi liz
ing silver mills, which lose Ju per cent of
the gold IN roasting as q whole. 10 rei cent
IN tue settlers ana another small loss IN
amalgamAtion.
Mr.. Fine urst directed his attention 10
the white sand lsilica particlesl IA the tail
inRs. A gravity test was made IN Denver
where Is was found shat the trans aren't
white particles. a pareutiy NOS containing
the slightest trace 81 metal, yioldel tWslNs
ounces IN silver and 3 IN gold. Here then
auuearei the leakage which accounted for
the loss when worked bY any known pro-
cess but which can be saved TO the highest
percentages yet attained b. tho new depaat-
ura alluded O..
The lreatsst portion Of the gold Is IN the
concentrates which from ths Eastun ores
Is shlpred ana WIl yield from i've - eight
ounces IN gold. Compared with the ASSAY
value. ON 80 60 80 yer cent % the gold
and nom 30 Co. % ger cent of the silver Is
saved on tue Concentrations.
Tue Idea OF usIuE twenty mesh screec-
besides increasing the capacity OF the
crusher TO twenty or thirty tons PR
days the fact that tho particles will cal
cine 20 better advantage.