International., 1925-08-31

water with coloring matter was
run through from the surface to
the tunnel sump, several hundred
feet, and the water appeared in
the same time as the copper sol
ution.
con June &c the company be.
gan to pump teaching solution in
to surface trenches at the rate of
$4,000 gallons a day. The first of
this teaching solution has just be-
gun to make it's appearance in the
tunnel sump. 1t is too early to
predict results, though the first
water, which simply carried sui
phuric acid without ferric sui
phate, is green with copper sui
phate.
"The teaching solution as fin
ally built up will be similar to that
Inspiration will use in teaching it's
mixed ores, carrying ferric sui
phate and several per cent of sui
phuric acid, being stronger than in
case of simple ..sulphuric acid
teaching. BY a special method
differing somewhat from Inspir-
alton practice the ferrous sulphate
generated to ferric state for re-
percolation through the ore.
''It is estimated that the COM
pany will be making 5000 pounds
Of copper day early in August,
in the old solution is quickly re-
and that this copper will not cost
over A cents pound. If the me-
thod is successful, output can be
cheaply increased by percolating
other unit areas. It will take sew
eral months of teaching to deter
mine how efficient the practice is.
This will have to be done by
churn-drill sampling of wines to
determine the percentage of cop
per still left in the ore at the end
of the teaching.
"The ore where the experiment
is being tried is somewhat isolated
from the rest of the deposit. 1t
contains copper in oxidized form
as well as chalcocite and chalcopy-
rite. The ore at that point ex-
tends to depth of ITO feet. By a
modification of the method it is
belived the primary chalcopyrite
ore can be leached successfully by
means Of a sulphuric acid-ferric-
sulphate solution. So far as could
be determined after six months of
pumping no channeling had taken
place but the water seeped through
in slow regular manner.
"In case this teaching in place
does not prove efficient, the COM
pany will open the chalcocite area
up for underground mining, crush
ore and leach it in tanks. By u.s.
ing the Inspiration method Of un-
derground caving for the chalco-
! cite ore and steam shoveling the
chalcopyrite, both grades of ore
can be made to yield a profit, as
Inspiration has shown it is able to
break even on ore carrying 0.8 per
cent copper in sulphide form.
ARIZONA Bagdad chalcocite ore
body has not been delimited yet.
Most of the drill holes have been
bottomed in ore. Engineers esti-
mate that by drilling these holes
deeper and putting down a few
more along the boundary the indi-
Gated tonnage could be increased
at least rs per cent.
"The primary chalcopyrite ore is
of wide extent, and more drilling
would show a much larger tom
mage. This primary ore outcrops
over considerable area. In places
it assays as high as Ia per cent
copper. It's thickness as now de-
veloped is about 200 feet"
If recollection IF the writer is
accurate the Arizona Bagdad Cop
per Company was known formerly
as the Hillside mine. 1t was west
from Hillside station, on the San
ia Fe, between Phoenix and Pres
colt. If the same, it is in vicinity
of the Mohave county line. 1t
was owned formerly by Judge E.
W. Wells and the Jack Lawlor es-
tate, both Of Prescott.-probably
still is so owned Some thirty
years ago the property was op-
toned to a New York and British
syndicate headed by Warner. of
the Safe Cure fame. A very
large payment was made. A mis-
understanding about the tender of
IA second payment caused a hot
legal contest won by the vendors,
to whom the mine reverted.
Verify, from the time of King
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