Gilpin observer., 1899-09-28
Tbe Observer Mi3i3@ Department.

usually found 20 cost more to save the
gold remaining in the tailings than the
value of the gold itself. After the
highest saving with the greatest capacity
has been attained, few simple auto
matte devices may be introduced to save
little closer, in the way of mercury
traps, etc. These require little atten-
tion and are cleaned up when occasion
requires. The highest percentage of
saving is made by those mills using
humping tables to concentrate the values
in the shines from the stamp batteries.
The Newhouse tunnel at Idaho Springs
has received a Roots rotary pressure
blower No. I in size to operate in the
exhaustion and blowing of air while the
tunnel is being driven. The blower dis
charges 63 cubic feet per revolution and
can be driven from 100 to 900 revolutions
per minute. The present length of the
tunnel is 1850 feet. 1t is claimed that
by the use of this blower the tunnel can
be completed to its objective point under
Central City. The blower exhausts
when charges are first put off, drawing
the smoke out through long line Of
boxes which are placed beneath the
track of the tunnel After the bad air
at the mouth of the tunnel has been ex-
hausted fresh air will be blown into the
breast of the tunnel at the pressure of
about five pounds, although it can be
increased to ten pounds, if necessary.
The pipe is reduced from "a to 10 inches
and then connects with the air-tight box
of 2ixlS inches. The tunnel company
will work night and day.
d. ]. Mckay, who is managing the de-
velopment work going ON at the Ayres
Leavenworth mine in Russell district, is
taking out very fine looking quality Of
smelling iron from the lower west level
of that vein. A shipment of the ore is
to be made to the smelters, when its
value will be determined.
Black Hawk parties have organized a
pool to work the Unexpected mine in
Lake district, owned by Major Hal Sayr
of Denver.
Mr.. Phillips OF the Egyptian mine,
Quartz hill, has the levels cleaned out,
and the mine is now in condition for a
regular output of ore. Since he took
hold OF the property he has had large
amount Of dead work in the way OF
cleaning up debris from the old work
ings to accomplish.
Forty bricks OF silver bullion each
weighing So pounds were shipped from
the Grant smelter in Denver last Mon
day night over the Burlington railroad,
consigned to the New York agent Of the
American Smelling and Refining COM
pany. No guards accompanied the train
There is great scarcity OF ore cars on
all the Colorado railroads, owing to the
large amount of smelling ore that is to
be marketed. .Smelters have received
orders to rush the unloading of cars at
their works and send them back.
Mayor Patrick Hughes. of Hughes
VILE, Fairfield district. was in yesterday
He says that Messrs. Coyle & Hamilton
have commenced shipping ore from their
prospect north OF the Emerald and
Toronto mines, and that there is con-
siderable prospecting being done in that
quarter.
UnGer the caption of "Money to Open
Mines" yesterdays Denver Republican
says the Islet Gold Mining company on
Tuesday filed notice OF an increase OF
capital stock from sl,00O,OOO to 81, 800,
600. The Josephine Mining company,
Incorporated with the secretary of state,
with S500,000 capitalization. The di-
rectors are w. A. Schorr, Charles A.
Stickle and A. l.. Sickle. Denver will
be headquarters. Operations will be
carried on in Gilpn county.