Ketchum daily keystone. (Ketchum, Idaho) 1884-1884, 1884-09-24

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intendent Moyle, of the w S. C. NJ. Co.,
through the Ontario mine, and the new
works erected by that company for the
concentration Of the large bodies of
second class ore coming from it, The
entire property, including both mine
and mill, we found in condition of I'M
common prosperity.
THE MINE.
The Ontario mine, formerly stocked
to number of Boston capitalists by w.
A. Rocks, cannot be said to always have
had the most judicious management.
Barely sustaining itself under the weight
of no small Indebtedness, these stock
holders became dissatisfied with its cir
cumstances, and little over year ago
sent out the present manager to exam
inc and report upon the property. He
found it comparatively destitute of ore;
but, after a scientific research, reported
encouragingly and was appointed to
take immediate charge. He abandoned
the old works entirely, found the ore at
from ten to twenty feet below, and has
since developed the mine in q manner
which shows him TO be thoroughly
practical miner. To-day the Ontario
ledge is continuously developed
throughout approximately 2,500 feet of
tunneling, drifting, etc, with under
ground connections 200 feet in length.
Placing the vein ut an average of one
foot in width, and it is usually twice that
size, there is over 300,0 cubic feet Of
ore in sight. Much of this ore is of a
grade marketable ut once, while the re-
naming large quantities of it are con-
centrated to q decided advantage. To
this grade, since the construction of
concentrating works, is largely attrib-
uted the insured success Of the mine.
There is about 2000 tons extracted, and
steady yield. This ore, reduced to
| one fourth, assays 100 ozs. in silver and
carries heavy percentage of lead.
| The working ground OF the mine is
easy and exhaustless, and is now in such
condition that the stockholders will
soon begin to realize handsome divi-
dends; and that they have one of the
best mines in Alturas county.
Not only has Superintendent Moyle
done this much for his company during
| the past year, but he has also marketed
| sufficient first-cIass ore to relieve the
| indebtedness of the mine and invest
SIS, 900 in concentration.
The concentrating works, built since
the first of August, occupy a fine mill
site at the foot of Boyle Mountain, and
| are covered by neat frame building con-
strueted on four elevations. The maehin-
cry consisting of huge Blake crusher,
two Cornish rolls, two COPELAND & Bacon
automatic jigs and four roasting screens,
all propelled by beautiful steam
engine compactly adjusted in every
particular, and working without jar.
The ore is dumped through trap
door, level with the. road grade, to the
crusher; it is carried thence by water to
the first screen; the fine portion pass
ing through slides to the bottom flool
and is carried, with the like results OF
screens Nos. and by the main eleva-
tor to screen No. /, over the jigs, which
! separates the ore iuto two sizes cores
pending to the two iigs into which il
then passes The first screenings
go through set of rolls and fail
to screen No. 2, the screenings o.
which pass through the finishing rolls
fixed directly under; the portion from
the finishing rolls goes to screen No. 3
the screenings of which return by ele
vator to the finishing rolls for secont
i crushing. Each revolving screen is ;
trifle finer than the one preceding, ant
the finishing rolls are set closer. The
jigs consist of double tank containing
in each division, ON one side, plunge