The Owyhee nugget. ([Silver City], Idaho) 1905-1984, 1906-04-20

feet in diameter on top, where they
are pumped into the first Of a series Of
six tanks each IS feet deep and 20 feet
in diameter, where they are allowed to
settle fixed number Of hours, when
the solution will become clear for
about oneihird the depth of the tank.
The clear solution is th,n drawn off
through hose which fills from the
surface until it sinks down to the mud
line, which is quite clearly defined, this
clear solution going to the precipita-
ting tanks and the shines below it are
again charged with new solution, and
the shines and solution, by ceutrifu-
gal pump, forced into tank No. two,
settled and drawn off as in the first in
stance and the same operation repeat
ed through tanks numbers three, four
and five or six, or until the values are
so nearly extracted that further repe-
tition would not pay.
Upon the theory or presumption that
the solution drawn from each tank
will extract 80 per sent of the values
then in the shines. il will be seen that
80 per cent of the original values would
be extracted in tank No. 1; 30 per cent
OF the remaining values or 25 per cent
of the original, in tank No. 2; 1215 per
cent in No. 3; 614 IL No and 3 8 in
No. 5. or more tha 06 per cent of the
values saved This j. the basis of the
calculations npon which the shines are
worked, but Of course it is not expect
ed to cary out in actual practice .ex-
actly what the theory shows. although
it is expected that the saving will be
very close to 95 per cent.
The work is also arranged in the mill
that except feeding rock into the crush
er, looking after the pumps and ma
chinery, changing the flow from one
tank to another, all is done with the
least possible labor and consequently
at great saving of expense.
The reconstruction of the mill begun
last fall and carried on during a severe
winter has been accomplished under
difficulties. The old mill had to be
torn out leaving only the engine and
boiler rooms on the front and ground
floor, and the shaft coupled to the
water power, With the driving
belts intact, with all the remainder,
from The ore bins 100 feet above the
ground floor to be entirely rebuilt In
order TO get a grade for sluicing out
the sand and shines. the platform sup
porting the great iron tanks hao to be
raised six feet higher than the former
mill floor. This has been built up on
substantial sills and pillars, the driv-
ing belt from the engine Dom running
under the platform. The roof of the
building was made six feet higher than
the old one, in order to secure head
room and better light. 1t required a
good deal of planning to adapt the
space occupied by the old mill to the
new, using the same power and shaft
ing for which much credit is due to the
general manager and his mill super
Iintendent in accomplishing
1t is too early to yet determine how
nearly the resul will come up to the
anticipation of the management, but
may be relied upon that the mill Will
do the work economically, and that the
miners will supply ore which, not so
high in grade as that worked in the
earlier years of their history, which
will yield very satisfactory returns.
and the old DeLamar camp will con
tinue to be noted producer for many
years to come.