The record-union., 1899-07-19
Pacific Coast
Mining News.


prove OF general interest: s
A GRAVEL MACHINE.
I'll Dorado Republican: The Umatil-
AZ mine on the south side of the coun-
y near old Coyoteville is using a new
contrivance for working the cemented
kraVels of the ancient river channels
VI this State that ought to be of con-
SIDERABLE interest to practical miners.
George w. Kimble and N. L. Kohn,
VINO are members of company that
nave been engaged in prospecting
sraVeI between Placerville and Web
DER creek, Immediately south of town,
Aof some time, went over to the Uma-
tilia mine this week to see the con-
triVance with the view of using SIM
lar machine themselves if its results
appeared to be satisfactory.
Ihe Umatilla mine is on the south
Side of a long lava-capped ridge lying
between Spanish Creek and Cedar
creek, and it's general characteristics
are similar to the ancient channels IN
this vicinity, although as a general re-
suit the gravels have not contained so
much gold. The company is now work
Ing the cemented gravel from the drifts
six-sided hollow cylinder six feet long
and six feet in exterior diameter. 1t
is faced with heavy iron bars and ar
ranged with screens so that the graVel
being introduced at one end and min
gled with water, falls continually upon
the heavy bars, the stones assisting in
crushing the cement by grinding IT,
The cylinder makes about 30 revolu-
tions per minute and requires about
the same power that a ten-stamp mill
uses. The company is able to put
through about 225 tons of gravel in
twenty-four hours and it appears to
be thoroughly worked, the cement be-
ing reduced to silt and the stones pol
ished free from adherent material.
John Rowlands is foreman of the
gravel operations and so far he thinks
very highly of the cylinders efficiency
as a gravel reducer. An amalgamat-
ing attachment to the machine is also
meritorious. 1t is a grooved plank
which is rapidly vibrated while the
gold-bearing material passes over it,
The result is that the sand in the
grooves is prevented from packing and
the gold and quicksilver is permitted
to settle to the bottom, thus insuring
amalgamation
Stamp mills applied to gravel have
always been uneconomical contrivances
on account of their crushing the stones
as we'll as reducing the cement, and
any contrivance that will obviate this
difficulty and secure the gold will be
a valuable assistance to gravel miners.
JACKSON BUTTE MINE.
at this property, which was started
up a few days ago, will soon be aug
mented by five more stamps, which are
in course of installation. The mill was
shut down some months ago in order
that a tunnel at a lower level than
that at which the mill was being sup
piled from could be carried forward
to the ledge. The ledge has been en-
countered in the lower tunnel and
promises to be good. Like most of
the mines in this section, this is what
is generally termed ''low grade" but
as the ledge is from eight to twelve
feet thick, it will prove to be valu-
able milling proposition. r. L. Marsh,
who is the original discoverer of the
property, and has had charge of the
development work thereon for the past
two years, is jubilant over the success
he has met with in opening up this
property for his company
: e TESTING ORE.
Winnemucca Silver State: An ex-
pert has been examining the North
Bonanza property in Flowery district
and taking samples of the ore from the
surface workings and also of that from
hA Ior of ha a
high percentage of lead, quantity of
which was raised to the surface before
work was suspended through the in
cline shaft about nineteen years ago.
This latter ore was found to extend
downward from the 800 to the 900 level.
There is a broad belt of it. assays
ranging from So to SIG per ton. a
small percentage of which is gold. The
present inspection of the property is
said to be in the interest of Colorado
capitalists. who, with their, advanced
and cheap methods of smelling that
character of ore, could handle it profit
ably by establishing plant on Six-Mile
Canyon Creek, not more than 200 yards
south of the mine, where there is suffi-
cient water power for operating crush
ers. The property is owned by j. W
Pearson of San Francisco.
CALIFORNIA; OIL.
San Francisco Trade Journal: 1t is
predicted with great confidence by
scientists who have given the subject
personal attention, that California Is
destined to be the largest coal oil pro-
ducer in the United States. This be-
lief combined with actual results so far
obtained, is causing capitalists to en-
bark into the enterprise of boring Tor
oil and developing the oil wells already
found Writing in the Visalia Times"
on the coal oil belt in the southern
counties of the State, Orlando Barton
gives information of much Importance
From his communication we learn that
around the mountain of five counties
the procession of oil prospectors moves
with constant accessions to it's num-
bers. Those from San Luis Obispo
and Monterey wish to get into Fresno
County Those from Fresno move in
half circles toward Monterey. Those
from Kings lead the procession, and
are most active in their own county
and across the line in Kern. Mr.. Bar
ton saws that the oil belt crosses Kings
County with an almost unbroken out
crop. From the line of Fresno County
the fossiliferous sandstone that pro-
duces the oil runs strictly south of east
three or four miles to Tar Canyon. Here
the formation is broken at right angles
and the oil bearing sandstone sweeps
round and trends almost exactly to
the southeast for the next four miles.
At Tar Canyon there is another bend
and the sandstone trends more to the
3,,c af ~