Lyon County times. [volume] (Silver City, Nev.) 1874-1907, 1907-09-14
W0NnEREIIl Is the Ore Body NJ lIrorn.rT
UUNDLllI u in the Mammoth tlutN lJNt
De Lamars Great Property Seen and Pictured Nv C..o
Walker one Of Americas Copper Authorities

on 'ile exterior of the crystals, they re-
spond readily to the magnet.
The Bluestone ore IS crpehad g.,
submitted to about twenty minutes roast
my IN furnace which operates con-
tinuously. The roasted ore is then RIM
onto 40-inch conveyor belt which car
Ties 1t directly under the four sets of
magnets. Over the faces of these mag
nets thin belt is run very rapidly. The
magnetic portion of the ore rises against
this belt, is drawn to one side and
cropped. What is not caught by the
nrst magnets is gathered up by the sec
ond, third or fourth, and the process
mas been SO highly perfected that an
ability to save 81 per cent of the total
values in the ore, and at the same fine
make clean concentrate, has been
demonstrated.
1t is claimed that treatment by the
magnetic process described will cost
considerably less than water concen-
tratlon. In view of the fact that the
latter process rarely RECEIVERS more than
IS per cent of the values in the ore, the
advantage of the former will be
recognized.
For illustration, saving of rs per
cent of the values in ga per cent ore
would mean recovery of about 81
pounds OF copper to the ton; saving of
90 per cent would mean about so pounds
to the ton. At 20 cents per pound this
eight additional pounds saved by the
magnetic system would be worth 81 80,
which in itself alone would constitute a
splendid and satisfactory profit on ton
of low grade ore.
What Captain DeLamar has done with
the magnetic process, which previously
had been little more than a theory
promises to work revolution in copper
ore concentration.
The Bluestone was examined recently
and sampled very thoroughly by engi-
neers who were supposed to represent
F. A. Heinze. Captain DeLamar wishes
to retire from active business and has
offered the mine for sale. Rumor says
his price is $40, 100000.
A mining man who knows the prop
erty and who is familiar ALSO with the
concentration experiments that have
been made, claims that the ore will
yield at least so pounds of copper and
90 cents in gold and silver, giving it a
gross value of $1,000 per ton on 20
cent copper market.
He says the ore can be mined for 50
cents per ton, and that the entire cost of
treatment will not exceed S2.25 per ton.
If 2 IL cents per pound be added for
freight, refining and selling, the cost
would be brought up to $3.50, leaving a
profit of 81 per ton or Sl4 1000, 900 on
the 1000 900 tons already in sight.
Plans are nearly perfected for the
erection at the mine of magnetic con-
centration plant of 1000 tons daily
capacity. Grading for the foundation is
already under way. If the property is
not sold to Heinze or some one else, this
plant will be constructed by Captain De
Lamar within year; and about II, 900, :
600 pounds of copper will be made
annually thereafter by the aid of an en-
tirely new concentration process.
The Bluestone should be watched care
fully, for the measure OF its success
cannot fail to exert decided influence
on the market value of the securities OF
all other companies operating in the
Yerington district.