The Bozeman weekly chronicle. (Bozeman, Mont.) 1883-1889, 1888-09-12

| eS'S'"i SPh' " VI tIIC tIlIDliRIl
its entire length. The Bessie is on hill
considerably lower than the ore on
which the Golconda is located 1t has
produced some verv high grade gold ore,
which sold at the Hecla works at Glen.
dale, for from $19s.00 to $3.50 90 per ton.
This ore was of course selected or came
from a rich pocket. The value of the
general paw as broken from tine lead will
probably range from $500 to $40. 90 gold
per ton. The Bessie's Golconda's and
Greaser's areas represent paralleo
gram 1923 feet along the course of the
vein by an average width of $50 feet 1.-THE
Golconda being 1928 by 49l feet. The
general course of the ore channel or crew.
ice being Northwest and Southeast, dip.
ping to the east at an angle of over so
degrees. The develope nents of the Col.
conda, together with the openings on
the Greaser and Bessie would seem to
justify the opinion that this vein extends
the whole distance of 1923 feet mention.
ed above. The ores on these leads while
carrying some free gold are not 30 per.
fectly oxidized as those of the Appal-
achian and Booz. Considerable pyrites
or "base" prevail especially on the lower
workings. While carrying remark ably
good average grade ore, it seems they do
not produce satisfactorily results in either
the stamp mill or the arastra hence these
mines are not worked at the present out.
side Of the necessary yearly representing.
With market for their product at or
near them these properties would to-day
make money for their owners and give
profitable employment to a number OF
persone. There can be no doubt as to
the large quantity of ore they can daily
produce under proper stimulus. This
brings rue to a repetition OF remarks
made in my last letter and an illustration
of the same regarding the sources of re-
venue open to the miner from the sale
and treatment of his ore. The Booz and
Appalachian producing oxidized or
free" ore can still make money by hav.
ing the same treated in the stamp mill or
arastra, while the Golconda with infinite.
ly more developments, showing at least
ten thousand tons of good ore lin sight"
carrying value in gold of from $25 90 to
$4,000 per ton is debarred this source of
revenue because its ores will not yield
there values through that method and
will not pay to ship.
These facts point out the great want
for some cheap or economical system
to extract at a profit the values
contained in these large bodies of
ore. The first sure step in the right dir.
ection, as illustrated by the Booz and
Appalachian ores, is oxidlzation-some
cheap way of changing these sulphides
to oxides. While great results will flow
from perfect oxidization, still much
loss is experienced as shown by mill and
arastra "tailings"-the saving "hardly
ever giving over go per cent of the as
say value and generally about ten per
cent below that figure. This loss is oc-
cassioned by the fine gold floating off
and generally known as flour" or "float"
gold and by gold that is coated" so that
it will not amalgmate when brought in
d~ect tcontact with mercury. This loes
and its cause is generally pretty will
known among mill men and many plans
have been divised to save these values
but 80 far without any appreciable sue.
cess if except the Walker.Carter dry or
vapor amalgamater in operation at this
point. l have before me the most posi-
tive proof that this machine will save
the gold in the class of ores mentioned
l will state case in point here. During
the month of August the Walker Carter
mill at this place among other dump
ores, treated twenty-four tons of ore from
the Red Bluff mine, which assayed 81. 80
gold per ton making total value of
$115.2O in the "a tons, six tons from the
dump of the Idaho which assayed $ll 90
gold per ton making S66 100 and three
tons from the Emperor dump assaying
$1,000 gold per ton making $1,000. The
total value ofthe three lots of dump.or
from the three mines mentioned i.
$21l.20, the "clean up produced bar OF
bullion worth $3.50 90 or over s. per cent
of the assay value. II is safe to state
that neither The stamp mill nor arastra
could have extracted anything near this
per centage, hence, it Is plain that this
amalgamator saves values lost by the old
system, both on oxidlzed surface ores
and ores oxidized artifclally. Ores
treated by this Walker.Carter process in
Idaho and the results obtained prove
the amalgamater will recover a very
high per centage of the gold, no matter
how fine it may be or how coated.
have already referred to its successful
treatment of Golconda ore, obtaining very
satisfactory results without the same be.
ing roasted. This mill is in daily op-
perat:on and any one can make all the
investigation desired and am satisfied
all facilities will be afforded to make the
same as searching and conclusive as pos
sible. The main point is that this pro.
cess is making money from class OF
ore thrown away as worthless. 1t is
daily demonstrating that an ore in this
section carrying SO gold per ton will pay
whether they have to be roasted OF
not, of course the profit will be greater
If roasting can be avoided. The expense
of operating the Walker.Carter mill fol
"a hours at this point as near az car
figure is $500. This includes oils,
lights, loss of mercury and handling
Treating twenty tons of ten dollar golt
ore and recovering eighty per cent woult
give daily nett profit of eighty # !,
dollars, or in round numbers twenty-five
hundred dollars per month. BY roast.
ing 1 believe over 80 per cent can b,
maintained but on this class of ore the
nett income would not be increased a:
. the cost of roasting would be equal tt
the extra percentage save1. l figure O
, course on the minimum basis of value il
3 the ores treated. As most of the mine
8 In this section will produce much high
t er grade ore the monthly nett outpu
a from twenty ton Walker Carter mil
1 will be nearer S5OOOO0 than s., $40 .OC