New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1907-05-20
NOTES FROM THE MINES.

An interest identified with the Batopilas Mining
Company says that as evidence OF the REMARKABLE,
efficiency Of the up-to-date equipment and opera
ton Of the Batopilas plant. the Batopilas Mining
Company finds 1t profitable TO treat third-class
ores. assaying as low as five ounces OF silver ton
which anywhere else IN the world would bs
neglected account OF high milling and treat
Tent costs. While working for richer ores a largs
amount Of low grade vein matter has to be broken
down and extracted In former times this was
broken and sorted by hand the rich ore was picked
and the remainder thrown away. Now only the
large pieces OF barren rock are picked out and ths
remainder goes to the mill and Is sorted by water
power, as 1t is better saving and moro effective
method and cheaper 10 crush through a twenty
hve-nesh screen and wash on concentrations than 1,
Is to cob to two-inch size and sort by hand
II would not be possible TO work such ore 70 ad-
vantage but for the fact that IL concentrates easily
often as high as fifty into The concentrates
are separated into two classes-one containing
high percentage OF native and black silver and the
the second Is mixed with pan tailinss and washngs
ol , hsn grade ores roasted with salt and leachei
The development work on the Big Pete mine 81
the Cobalt Central Company IS progressing with
great rapidity. and the shaft IS now approaching
the l6o-foot level. where another DRIFT Will Be
driven into the vein -he drift the 1Oo-foot level
Is well into the diahase. and advices received
Friday at the Offices OF the company are that
values continue 10 improve. and that the vein 70
widening with depth. AS matter OF fact. tho
last samples taken from the mine were by fss
the richest since the vein was opened UP. Ths
work on the concentrating plant has reached an
advanced stage and the machinery will De ready
large tonnage will he sxnossa on tha levels o.
the Big Pete vein
The TOmboy mine for the last dye months has
been earning $4,000 month on an ore produe-
tion OF about 10000 tons. The Tomooy mine Is 10
Gated in the San Juan district of Colorado. ard
is in the same mineralized zone Old Hundred
part OF the machinery for increasing the mill
ing capacity OF the latter mine has now been SET
up. and within a few weeks the plant will begin
operating basis Of from 10000 20 5000 IONS
a month AS the character of the ore is practicaIy
fore midsummer it's earnings will amount 10 from
two TO three times as much as those OF the 4o'H-
boy.
The management OF the Nipissins Mines Company
is making preparations materially 10 increase fAs
development work the companys property ]"
the season. The company now has nearly TIRES
hundred men employed its property. or aoo~'
double tho number at work at this time last yeal'
Accommodations have been provided for six h--
dred men. and ii Is the intention OF the manass
ment 10 add to it's working force as rapidly =
possible. Considerable difficulty is experiences "a
securing competent men. particularly at this seaso.
of the year. when there Is a disposition on tts -
of nearly all those who have fair knowleuse -
mining matters TO go out proSpeCtlhs o.i -
account 1t is stated that the samplins MN W..
by the Alls-Chalmers Company Is now eOiH'
and in operation, which will give the c9'ipaHS
good check values. The governments =
pushing the work the railroads. and " WI y III
matter of short time only when the conn.,
be able to load with ON Its own - - ths
Shipments of have been retarded. OWNS ' ~ IN
fact that the ice on the lake is yet too stronS
permit the transportation OF ores on oarseS sfr OF
10 is not heavy enough 10 allow the ttatS s,1onv-
sledS II Is estimated that the a1r a.
now has 15O.Cfo tons of ore ready 1or shlti'0
The Colonial Silver Mines Company mas M &c
shipment 10 the American Smelling ana i'el .
Company and expects to make regular shlpnrr
In the future. The company has three "oi :,
shafts and three tunnels. AT the pressns uyyyySsbb
has I20o feet underground. working Ihe, a.
shaft is the lowest part OF the mine na',S s,irJS
tanned depth OF "a feet ''B'' shaft which - h.sr
on the ''R' vein is considered at present the o''
part OF the mine.