The Salt Lake tribune. [volume] (Salt Lake City, Utah) 1890-current, 1909-12-12
BIC DEVELOPMENTS
AT MOHAWK MINE
Large Bodies of High-Grade
Opened and Left
Standing.
WILL LATER BE
MIXED WITH MILLING
Florence Mill, With New Equip
ment. Makes Close
Saving.
Special TO The Tribune.

GOLDFIELD, New, Dec 1l.-Esti.
mates given out officially by the man
agemcnt of the Consolidated Mines com.
pany place the output of this company 's
mines in November at 10, $50 tons, with
n gross recovery of $635, 900 and an cs-
tImated net profit of $4S0,000 AS was
pointed out in the recent monthly report
of the manager, the total cost of pro.
duction has been, and for short time
will probably continue to be, in excess
of the established rate of expense. for
the reason that a largely increased
amount of development WORK IN all parts
of the property is being carried on for
the purpose of opening up additional
reserves of ore in preparation for the
enhanced demands soon To be created
by the greater capacity of the reduction
plant.
While new ground is constantly being
opened up in the Combination Jumbo,
Clcrmont and Red Top, the principal
new development is in the Mohawk
mine, whore most gratifying results
have, without exception, attended this
work, which is being carried on in a
systematic manner, with a Wow To tax
ing out every pound Of ore that will
yield profit in treatment. Large bodies
of high grade, Of the character that en-
richcd the early lcssecs on this ground,
arc exposed in slopes at the AO3.foot
level and AT other points and will be
required for mixing with ore Of lower
grade.
Want Low Grade Ore.
At the present time, in opening the
large ore bodies, the chief object. and
one which has created some difficulty at
times, is to maintain grade of orc of
sufficiently low grade 10 meet the re
quircments Of the mill in treatment and
/ IL Ia.
wall matter which in some instances,
has supplied material of paying value.
This work is for the purpose of securing
waste for filing the slopes after the
ore is extracted and ck-hlling the
workcd-out drifts to prevent caying.
At the 4j0 level one stopc has been
opened at a distance of 240 feet and
has twenty-five feet of excellent ore.
The great slopes to the southeast are
opened continuously between depths OF
4O7 and coo feet, and have yielded a
vast tonnage of good mill ore. Beneath
this point drifts from fifty-foot winze
arc in ore of excellent grade from
twenty-five 10 thirty feet wide.
Pressure from swelling ground has
rendered necessary retimbcring of the
shaft for seventy feet through the main
vein. the substitution of 10XlO Oregon
pine timbers for lighter ones and the
construction
prevent the crushing Of timbers. Three
cross.cuts lately driven into the foot-wall
of the main ore shoot at the GOO level
have exposed large tonnage of good
ore and other excellent shoots have been
found in the latite, formerly supposed to
be barren of values.
New Equipment at Mill.
Additional equipment for the big Con
soldated mill is arriving and being IN.
stalled, and il is hoped TO have it in
full operation with capacity of 900
tons daily by the 25th of the month.
The new equipment includes six 6toot
Chilean mills Of latest pattern, twenty
six Deistcr concentrating tables, four s.
foot CaIlow classifying cones. high
power electric pump, new compressor,
two agitators and two electric elevators
to be used for hosting tho oversize
from the tube mills TO the classifers. No
additions to the mill structure have been
necessary for this installation. Blankets
will be employed on some OF the plates
for saving the coarser gold, which re
quires longer to dissolve in the cyanide
solution.
The Florence mill. with its recently
installed crushcr and other new equip
ment, is now treating an average of
100 tons of ore daily. with saving
of from 92 TO "a per cent of the gold
content and is making regular ship.
mcnts of concentrate TO the smelters.
Through the medium of changes made
by the new mill Superintendent, the re-
suits from amalgamating have been
greatly improved and from a large part
of the tonnage fully SO per cent of the
gold is being saved i'll this manner, and
40 per cent of that which was formerly
in the concentrate is now be-
ing sayed in the form of bars Of ANAL
gam bullion. thus making an appreciable
saving in the item of transportation ex-
pcnse.
Bullion in Vaults.
Within the past week the troughs.
IaundeTs and other portions of the wood
work in the mill which has come in
contact with the ore in various stages
of treatment have undergone n clean
ing-up process. with tho result that
of dollars worth of fine gold
have been saved and stored in the COM
vaults in the form of bullion.
a new ore body carrying high values
has been opened at the 500foot level,
the deepest in the mine, near the old
Engineers lease workings. where there
is still 81 considerable amount of rich
ore standing. A stope Is being opened
Il distance Of over 200 feet in an ore
body through which raise has been.
driven 100 feet showing cirht feet nj