Bisbee daily review., 1910-01-28
STOCK MARKETS, ROADS, Financial AND MINING
SCHNEIDER GROUP IS NOW
SUBJECT TO PURCHASE OPTION

have been driven Oh tAe 10 ard $50
foot levels for a dis.arcc of about $50
feet north and 100 feet soath. From
these crJss-cuts north of the shaft
laterals have cen diven both east ana
west for distance OF over 200 feec
These drifts have been started from
the crosscut every 200 fee. tie first
two on each level beginning az lis
lance Of 100 Zee; from Jae saa-c
Thus. there are six lateral drifts
from the cross-cut on each of the two
levels. These levels have lst ne.
Gently been connected by q Iaise 800
feet north OF the shaft. At 100 feet
south OF the shaft a drift has been
driven ives from the lower level. The
workings farthest north are deepest
the breast OF the north cross-cut on
the 250-foo level being about coo feet
below the surface.
The naturalization OF the mine Is
mostly OF oxidized copper and iron
minerals, the former giving TO the
rock throughout the greater portion
OF the workings q fairly uniform green
color On The l50-foot level now
ever, the ground opened by the north.
ern and eastern workings shows con
siderable salphide copper. West OF
the north crosseut on both levels
the naturalization is somewhat less
and the work sout of the shaft has
developed Only small amounts of pr
rite. with lille or no copper yalu-
Granite. porphyry and schist are the
principal formations, the later lying
below the Former
Buildings sumcient to shelter Tne
hoist compressor and supplies have
been erected. The blacksmiths and
carpenter shops are newly but. The
The heaaframe OF the shaft is sib-
stantially built. aud is about forty
feet in height. Many of tie supplies
are stored at tne Miami Copper com
pany's warehouse and these are
drawn on as required.
Miami's Progress.
The development work done to Gate
on the property of the Miami Copper
company covers about forty of the
acres located near the center of the
E property. The ore exposed or blocked
out by the underground work is e.
mated at over 100000 tons, o.
which the average grade, accorCIni
TO assays made Of mat exposed foi
sampling. is Pa per cent copper
Tests on the ore have shown that =
per cent of the valuable mineral.
can be extracted by concentration.
This rate OF extraction Yields ap
proximately forty pounds OF cope
for each ton Of ore mined. or &C..
100000 pounds Of copper as the tota
production. assuming the ore BODY
already developed to contain 10000
0O0 tons. as estimated by the mar
/ agement.
i Most of the work has been done o.
(, and above the 42O-foot level of tn
: of themfne. At this depth Of AZ
feet the ore is fairly uniform in value
About 5000 feet of work is don
every month in drifts, raises, winze
and shafts.
A geographical may, made by d.
+ Weed. shows $50 acres of the Milan
property to be strictly mineral. o
which the prospects of finding lar.
5 bodies of ore are practically al
sured. All ore occurs as chalcocn
disseminated uniformly throug
quartzose sehist. and this fact make
q the proposed method of mining b
: auxiliary raises and sub-leveI stol
I ing very practicable. This method
original with the Miami Copper con
pany. About so per cent OF the OF
> will be mined in rooms by this met
. cd, and the remainder viii be e
tracted by the top-slicing and SUI
4 level caving methods.