Daily inter mountain., 1899-10-10

hours are given to each vat, from the
time of one filling to the next. OF this
time twelve hours is required for empty
| ing. The leached ore is discharged from
the vats, through a hole in the center of
the bottoms to cars which are conveyed
to the dump by an endles rope. On ac-
count of the presence of considerable
kaolin and tale in the ore and the scarce
| ity OF water sluicng is not deemed ad-
visable, but mechanical contrvance
for moving the tailings by machinery is
being experimental with in an endeavor
to save shoveling and expedite the en-
tying of the vats.
The first solution used contains 90
cA; nide (eight lbs. to the ton). OF this,
about one-uuarter of ton to each ton
of ore is used and this is allowed to re-
main in contact with the ore for eight
hotrs. What is called the teaching solu-
| ton, carrying "a 90 to .25 90 cyanide
Give pounds to the tom is then turned
on through 1-inch hose and this perco-
lates slowly through the material of fifty
| two hours. The ore is then washed twice,
about six and a half tons of fluid being
used for each wash on a seventy-ton
/ charge. The first wash is fluid that has
been used as second wash on a previous
vat and after being used twice goes into
the teaching solution. The final wash is
always clear water and the vacuum pump
drains the charge after this wash The
ore enters the leacing watts carrying 40 90
me sture and is discharged carrying IS 60
showing waste of nine tons of fluid to
each 100.
There are two solution tanks. each II
feet in diameter by 4 feet in height. one
sump tank 14x4 feet, one water tank 14N12
feet. The precipitation room contains
SIN zinc boxes. The product is refined
by the use of sulphuric acid. The ore
contains very little silver and is remark
ably free from base substances generally.
The refined bullion is 500 to $50 fine and
| the bars of almost pure gold. containing
in the neighborlood of sixty ounces each.
are as handsome in appearance as one
ever sees.
The company owns seventeen different
mining locations but the ore treated at
present is derived from four only. OF
| these the Chicadee is the mine near the
mill and the ore occurs here in large
! pockets. some ines 100 feet in with. 1t
| is good ground to hold up; some squares
sets are used, at other times heavy stulls
and in some places crbbing and filling
ara reSOrted to. The lowest depth at
| tanned is 200 feet
The great BODY Of the ore treated is
porphyry and altered lime. There is
very little quartz and the ore does not
contain on an average over = 90 silica.
The porphyritic ore assays from So to $40
and the lime as high as $l2O per ton.
Everything assayng as high as $3 gees
to the mill. The ore treated averages
about 81 and the tailings assay from 40
cents to Sl.40, the average being less than
! Sl00. Work on the new mill started in
! September. 1898 and finished in February,
| 1899. It's cost is given at $4,000 It's ca
pacity is 40 tons a day. During July.
! 1899 it handled $500 tons at cost per
| ton for milling of $1.32. The mining dur
ing this period cast $1,41, making the to-
tai cost for mining and milling $2.73. The
cyanide consumed for this month was
ESQ pounds. about eight-tenths of a
pound per ton. The motive power OF
! the mill is a 125 Fl. p. Corliss engine. for
which two 65 II. p. boilers furnish steam.
/ A 3-drll Rand air compressor is used in
the mine. and both mine and mill are
iliehted by electricity.