The Hot Springs star. (Hot Spings [Hot Springs], Dakota [Dakota Territory, i.e. S.D.]) 1886-189?, 1890-05-09
GlENDNlE TIN M,N!AG CO.
American Tin lcins Steadily psuducea
From an American Mine.
From the Rapid City H,p :Llican.

From the Rapid City RIP :hlican.
Comparatively few persons have
that from the beginning Of this
year a mill has been in successful orer-
alton, crushing night and day tin ore
from the Black Hills. and making reg
alar shipments Of the tin to 1.-THE east.
While eastern Papers at home and
were busy denying the exist.
ence of tin in Dakota, and critici.ine
every II who rlaimed TO know that it
was here in inexhaustiLle quantity,
and Of better quality than anywhere
a few gentlemen were busy de
vclop;ng the Glendale tin Mine SO as
to supply II mill steadily. and carrying
on careful, systematic tests of machin-
cry for working the ore. Their efforts
have been crowned with success, and
the Glendale Tin Mill began work Jan.
LIST, 1890, and has been steadily at work
ever since.
The mill is located on lion Greek.
about % miles southwest of Rapid
City, at the foot of the mountain in
which the mines are situated. The
mill proper measures fifty feet in
width by le0 in depth, and is divided
into three stories. " IS Unique in
plan, compact and convenient: we'll
built in all particulars, aud protected
from all danger of fire, 10th by a sys.
of water pipes and by having
etc, covered hy a thick asbestos
coatlng.
Either steam or watsr-powcr may lie
used for running the machinery. The
equipment consists of two oMe-
hundrcd-horsc-powcr boilers. and a
acknowledgements high speed
manufactured by the Phoenix
Iron Works, of Mcelsvillc, Penn.
The watcr-power equipment consists
of a flumc, bringing the water from a
dam on Iron Creek, IL miles distant
from the mill, giving a head of 100 feet
pressure at the wheel. About 500
miners inches of water are supplied to
the turbine water wheel. The water
power will be used except during
cold S, IS in the winter, the en-
CINE Icing placed in the mill as reserve
power in case of accidents.
,IfE PROCESS OF CONTEMPLATION.
The II is hoisted from the main
and dumped first into an ore bin
of two hundred tons capacity, located
high upon the mountain above the mill.
From this bin ii is conveyed to the mill
by a wire rope bucket tramway, the
going down hill to the mill haul
ing the empty buckets back to the
mine. The ore buckets mechanically
deliver their contents into a 175-ton
ore bin. above and back of the mill.
The large Jumps of ere are crushed,
first by a Gates crushcr, then passed
through a dryer to a set of Gates I'm
proved Cornish Rolls; th,nco elevated
to a set of rotary sizing sleeves. From
the sievcs the finer sizes are conveyed
to a set of Paradox Concentrating Ia
bles, and the coarser sizes to common
Hartz jigs. The screens, iigs and con
c%entrators separate completely all of
the mica. quartz and feldspar, leaving
clean concentrates of cassiterite or on
Idle of tin. ready to he suuslted into bar
tin.
The concentrates are, for the present
being slipped TO Chicago To he smclted.
but it is the intention OF the company
to erect at once a smelling plant in the
The first shipment Of conce1.-
TO Chicago yielded 65 per cent.
of metallic tin. and ths second ship
ment Is per cent. 1t is expected that
with more practice they will Jicldo over
per cent.
THE
The nam shaft of the mine is a
double compartment shaft, measuring
ten by twelve feet wide, and has
reached a depth OF $50 feet. The top
of this shaft is some 500 feet above the
level of Iron Greek.
a main tunnel measuring eight LY
ten feet in diameter, has been started
400 feet below the top of the main
on tile vein. and has already
been driven over 2225 feet into the ore.
and will eventually form a junction
with the main Shaft. Another vein
across the creek has BEEN opened at a
depth of 500 feet below the outcrcp.
showing over thirty foot face of orc.
Beside these there are over fourteen
shafts and pits from twenty to forty
feet i'll depth, and six large open cuts.
The main vein measures from % to 80
feet i'll width at the outcrop, and over
40 feet in the lower working. There
is no doubt as to the true fssure char.
acter of the VEN as it cuts the states at
nearly right angles. and has well de-
fined polished walls with a thick CLAW
gouge or cleavage. The vein stuff is
principal albite (winte fcld>par) with
l.o.o a.l Al.. ~