The Bozeman weekly chronicle. (Bozeman, Mont.) 1883-1889, 1888-08-29

tor. A great part of the ore treated at
this mill was taken from the various
waste dumps of the camp and was con-
sidered worthless as little or nothing
could be saved from it, still this process
produced in Is days in July running
from Z a. m to 6 p. M. 95 ounces of bull.
lion which yielded we 8 1900 at an
actual expense of 1894, This mill has
no roasting or oxidizing furnace except
what little may take place in the ore
passing through the revolving cylinder
dryers. The mill men claim these re-
suits are due to the amalgamater which
the gold no matter how fine, light
or rusty it may be, and also the gold in
association with tellurium, which pre-
walls more or less in all ores in this Dis
trict. The gold in association with the
raw pyrites is of course lost. This was
proven, by pannlng the iron pyrites and
separating it from the gangue rock and
roasting or oxidizing the sane on a piece
of heavy sheet iron. after; which roasting
the gold appeared free. l am informed
there is nov in operation at a place
called Gibbonsville in Idaho a complete
mill OF the Walker-Carter process in.
Guiding the rooster and all, and that it is
a demonstrated success. In connection
with this amalgamater there are two
machines that should attract the atten.
ton of every mill man and smelter. /
refer to the Gates combined fine and
coarse crusher and the Frisbee.Lucop
dry pulverizer. Both these machines
have been in use long enough to fully
test their merits. This crusher is so ar
ranged that it will crush coarse or fine as
may be desired, reducing rock from
pieces one inch in thickness to one
eighth of an inch. Its capacity is gov.
erned by the %fineness required. At one
inch it will do six tons Of rock per hour
and at one. eighth of an inch, two tons of
rock per hour. But small power is re.
quired to drive it. The Frisbee. Lucop
dry %pulverizer will easily produce one
ton of sixty mesh pulp in one hour,
This has been repeatedly demonstrated
till I am fully satisfied of it's correctness,
In special cases the machine has pro.
duced 1890 pounds of sixty mesh pulp
In one hour and eighteen minutes. Of
oouse at this rate good pulp can be very
cheaply produced and all mill men fully
understand this great advantage.
have seen drawings and plans of the
roasting or oxidizing furnace and had its
operation fully explained to me. 1t is
properly called an automatic mufle
roasting furnace. The feed-the speed
with which the ore passes through the
retorts-the quantity ofore admitted and
the heat seems to be under perfect con-
troll. 1t is claimed ores can be thorough
ly oxidized in this furnace for less than
81 per ton. Samples shown me of both,
raw pyrites and the same oxidized, iusti.
fy me in stating that the roasting is al.
most perfect, but a small fraction of q
per cent of sulphuric acid remaining.
From all these facts, which can be
easily verified, it would seem we have
now in our midst a system that will be
mainly instrumental in reducing at a
profit the great bulk of these low grade
dry bose ores. No n can estimate the
great results and great benefits that will
accrue to the mining and other interests
| Of the country should this prove true.
As I close this letter | see old Baloy in
the far distance, the beams of the setting
sun illuminating his hoary head that has
Tor centuries stood up proudly amid the
terrible storms of winter and the heat oil
summer, whose sides are scanned with
veins rich in the precious metals-
Meadow Greek, Richmond Flat, Pony
and Potosi with their treasures are now
silent, but I believe the day is not far
distant when these districts will be the
scene of a great and successful industry
giving profitable employment to hun.
dreds of people and a home market for
the products of the farm. b.