Daily capital journal. (Salem, Oregon) 1903-1919, 1904-08-23

through the glass sides of this ele
vator and see the shining ore in the
series of buckets. The gravel is
forced from the bin to the top into a
big revolving round screen with com.
paratively large meshes. From this
screen there are two pipes; one car
ries away the products that goes
through the screen and the other
takes away the larger pieces and re-
turns it to another crusher that re.
duces 1t to a finer state and frees
whatever metal may yet remain. The
particles that get through the screen
are carried through a long slender
tube to jug No. 1, an oblong box with
a false bottom made out of coarse
screen. The box is filled with water
and a pump at one side agitates the
water against the bottom and carries
the heavy and valuable metals to the
bottom of the screen, while the stone
and waste materials are permitted to
escape through pipe and are carried
away. From this first jug much pure
metal is obtained.
There are four jigs. In each sue.
cessive jig the screen at the bottom
possesses finer meshes and the parti.
cles that go through them are smell
er The pieces that do not go through
are carried off and contain nothing of
value. In each jig quantities of the
concentrates, as the metal thus
separated is termed, are collected and
carried to receptacles prepared for
them
The jigs occupy space down near
the floor, and each is fed from a sepa-
rator that corresponds to it in num-
Der and is perched high up in the
mysterious machine above it. TIE
force of gravity and liberal supply of
water carry the crushed ore down
into the jig.
From the last separator, when the
ore is reduced to merely sand, the
product is carried down to a large
table about five by eight feet. This
sand, while rich in ore, was always
simple waste until this marvellous
machine was invented Now every
particle of valuable ore is collected
and saved and only the worthless
sand is carried away with the water.
This table is the spectacular part
of the entire process here on a
slightly inclined surface, and within
a few feet of the reach of the visitor,
the metals all align themselves, and
in the journey across the table they
separate themselves and form a rain
bow of color that is marvelously beau
tiful.
The surface of the table is covered
with a dull-colored lnoleum. Small
cleats of wood are allied on the sur
face of the table lengthwise They
reach upward not to exceed a quarter
of an incn. The table slants just
trifle and is shaken lengthwise at the
rate of 24O strokes per minute.
The dull colored sand reaches the
table through a long tube from the
last separator and is spilled on the
upper corner. A stream of water
comes down through the same pipe.
The vibrations of the table carry the
sand diagonally across it. The water
that accompanies the sand and accel
crates its Journey The heavier met-
al clings more tightly to the water
covered linoleum and is carried the
entire length of the table. The sand
from which all of the metal has been
freed is quite light, ia comparison,
and takes a shorter course and is
thrown into a vat and is carried away
as waste.
It is around this table that the
fair crowds of visitors linger
and marvel The gray-colored stone
the larger part of the mass.
The upper edge of the table appears
10 be covered with a wide and beauti-
fully colored ribbon. Tnis is a series
Of streaks of the metals as they align
themselves. The gold, being the
heaviest of all, forms the outer edge.
It's rich yellow tinge stands out In
bold relief against the gray Of the
silver. the next heaviest metal. Then