Bonners Ferry herald. [volume] (Bonners Ferry, Idaho) 1904-current, 1921-05-26

the west side of Boulder creek. The
stringing of this wire cable was a.
work of some magnitude, but its in
stallation greatly aided construction.
The carrying cable was operated by a
donkey engine on the east side of
the stream. steam power being gener-
ated from cord wood, cut from logs
skidded from the steep slopes above
the engine house.
Assemble Concentrating Equipment.
The concentrating equipment is now
being assembled and actual construc-
ton is to be commenced almost i'm
mediately. The management says that
it will be in operation by July or Au-
gust. The principle equipment will
be 30 Ogden Modern tables, for which
the company owns the patent rights
and which are now being built at the
main camp, and some special hydraulic
mineral and gem classifiers and con-
centrating apparatus designed by S.
A. Deardoff, assistant-manager of the
enterprise. There is nothing revolu-
tionary or Secret" about these de-
vices. So far as the writer could de-
termine they are all feasible in prin-
ciple and all based upon natural laws
of gravitation. Mr.. Deardoff says they
are the result of ten years special
study of the enterprise itself and are
designed to catch fine gold and classify
the rubies. A demonstration was made
for the special benefit of the writer in
model plant at the main camp and
there is no question but that extremely
fine gold was caught
Install Ogden Modern Tables.
When the concentrating plant has
been completed the fine sands caught
in the first sections of the fumes an |
collected in the cement storage tank
will be elevated to a 10x30-foot steel
tank (now on the road between Leonia
and the camp by hydraulic lift. From
the tank the material will pass by
launder to a series of so Ogden tables,
which are of stationary tpye, fiCcred
with corrugated rubber, and capable
of adjustment to varying conditions
Black sands, find gold and other metal
lie particles are washed off at the
further ends of the rubber rifles. set
at an angle of about As degrees, into
launder fitted with open spigots and
the worthless material carried on into
the tail race.
Specially Designed Rhiie Boxes.
The black sands, containing gold,
then pass over a specially designei
battery of RIFLES IN which the black
sand is washed clean of gold particles
and the latter caught in a three-inch
cleanup race alongside the rifle. The
rifle boxes are three feet wide ard
will be arranged tandem in such man
ner that one set can be cleaned up
without interfering with operation of
the others.
Separate Gold and Rubies.
The material from the second rifles
in the main fumes will be conducted
by launder to a special bin to be
graded out in rock just below the big
storage bin and thence carried by
bucket elevator to the upper part of
the concentrating plant This material
will contain any nuggets, the larger
PARTICLES of gold and also the rubies
1t will run over specially-designed riff
lie boxes, later will pass on over an
other specially-designed rifle where
the rubies will be separated from the !
gravel and the latter diverted into the !
spillway. The rubies will be divided
INTO eight classifications in a specii |
classifier designed by Mr.. Deardoff /
The great mass of these rubies run |
from the size of shad roe to little
smaller than pea, although several
lave been found of much greater size,
some as large as a carat and a half
when cut. The larger stones are sell
lom perfect however. and it is not
that any appreciable income
will accrue from this direction. The
mailer stones are said to be in some
lemand as an abrasive. commanding at
his time around $35 per ton. The
writer has had no opportunity of look