New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1881-01-17

piece Of first-class workmanship. Lsyee 49,
drawn by mules will be used In IL. The lenoth "
the tunnel is now 94S feet and it must BE- AZ. -
1873 feet more before Il win cut the incline. "a z
The ore deposit. like those on Carbonate -
Iron hills in Leadvlle, Is in the form Of ehpt1 -
a contact vein. The dip Of the contact wbIsk' 1:
followed by the main incline. is 800 40 m
direction Of the incline is north 41o east ANA a.
strike of the shute north 900 east. A. q 7,
direction of the incline Is more to the north ~.
that of the ore shute, the former runs acrosr q
latter dagonally, and has finally passed ont !, :
leaving the ore body on the right. Sixty-tvo -
from the mouth of the incline cross-cut bas \. -
made across the vein. No. cross-cut IL sxtv ~.
from No. l, No. GIG eighty feet further down ~ :
seventy feet from No. 3i2, and No. eighty.fvs -.
| from No. 4. In examining the mine went 80 &
each of these cross-cuts In succession and exp,o,s
| the slopes as far as any have been opened re
average width of the ore shute Is ninety feet A.
the top of the incline to within thirty-ve 80 -
| its bottom where the passed to the southssss,
as have explained. The average thickness Of ~ I
| ore is six and half feet. 3d.
The ore on the sonth side OF the shute Il aa,e..
CARRYING considerable quantities of iron pyr;s.s 4
| and therefore has to be roasted before it CA. ~
smelted. That along the north edge Of the sbrs.
seems to have been subjected to the action AZ ~
elements anu utSulpuuIlZcu ouu OAfuiZc0, that
it can be sent to the furnace at once without ~.
| limnary treatment. The oxidized ores are w.
naturally the richest. They occupy the sam.
space as before the sulphur which they formsyJ,
contained was removed, but their specific gravity 4
so much less that it requires more cubic feet a
them to make ton, while each cubic foot carrie
the same amount of silver as before. The sysrsss
yield of the Oxdzed is 21O ounces of silver 10
ton. while that of the sulphurets has been "a
ounces of silver The amount of sulphuret ORR
thus far removed from The mine has been about
twice as great as that OF oxidized ores. No low
grade ores are left in the mine and the yela given
above is the average of all the rock without any
asserting These figures are not estimates foI they
are taken from the returns OF sales which eY.
amned OF more than 5000 tons. recent est.
mate of the amount of ore in sight in the nina
made by Mr. Brown, the superintendent, placesi il
ut the enormous figure of $50, 100000.
The present cost Of operating the Robinson mim
and of obtaining returns tor ore sold is very great
The mining expenses are about $40 ton freight
on the ore to Leadville Si3 ton, cost OF smelling
Sls a ton Besides these expenses there are the
cost of roasting the sulphuret ores, money which
must be spent for permanent improvements Incl
dentals etc. which make the actual cost Of the
ore, at market, about $50. The lowest grade Of
value of the ore shipped daily is about $1,000
The cost of permanent Improvements about the
mine, including the long tunnel, has been only
$4,000.
MANAGEMENT OF THE WORKS.
There is one feature of Mr.. Browns management
of this property that may be initiated with pred
nc other mines. Every item of information which
is sent TO any officer member of the company il
sent to every stakeholder. The periodical reports
on the condition aud output of the mine are dupll
Gated and separate copy is mailed from Mr.
Browns Office here to every one who holds single
share of stock so that there eau be no suppression
of such reports for the purpose Of specializing in the
shares of the company. Nor is this all. IL the
presiden. Of the company or any officer or stock
holder in it writes privately to Mr.. Brown for in
formation about the mine, the manifold copies Of
the superintendent reply are mailed by him 10
every individual stockholdcr at the same time that
1t is sent to the person asking for the information.
As long as this rule is adhered to- there can be no
cliqro in the company operating on the strength
of EXCLUSIVE information privately obtained from
the manager of the mine.
The need of a smelter III which the ores OF the
Robinson mine may he treated right here at tho
month of the tunnel has been a very pressing one
and is Mt length about to be realized. The Summit
Smelling Works, of which Mr.. Albert Arento ID
manager, will DO completed in few weeks. The
furnaces will consist of two stacks each hayngs
capacity of thirty to thrty-iiye tons day, and
when in RAINING order will be able to treat the
Robinson ORES ut such prices as to enable the min
ing company to realize as clear profit all that they
get from the ores above $50 ton. For roasting
the suphuret ores eight reverberatory furnaces
have been built, four belonging to the mining com.
pany and four to the smelling company Two
stacks, each 100 feet high will conduct away the
fumes of sulphur. The deep SHOWS OF winter will
interfere with the moving of materials and build.
ings large enough to mold five months supply OF
charcoal have therefore been put up and filled with
coal. The cost of charcoal here is to 10 centss
bushel and that OF coke 1927 ton.
The Robinson mine is certainly the richest, Oil
things considered that have seen this season.
have examined shutes of ore that cover a larger
superficial area, but tho grade OF the ore here II
much higher and much more even than any othe'
of equal size which ! have visited. Mr.. Brownf
estimate OF So 5OO0 900 worth Of orc in sight may N
too great bat be is tar less likely to make mistake
than if he was estimating upon ore in an irregular
deposit like those that have deceived so many ex'
perts on Fryer Hill.
/ went over to KokOmo the other day, and visited
q few of the best known mines there. On the top Of
Elk Mountain. above timber line, saw the After
lnaLn ana Nnlte quail mines, WHICH, eAcoPe eHs
Robinson, have been worked more than any Others
in this district. The road leading to them is almost
as steep as the Pixies Peak trail. The ore wagons
come down easily enough, but, even when empty
are hauled I'D with great diff 'uty. In Maynower
(;ulcb the Gilpin and Silver Blossom are said TO Dc
promising prospects, but did not visit them. on
Chalk Mountain the Wheel of Fortune Is well
,noken Of. Several new strikes" have recently
been made, of which the Hoodoo or Gray Eagle.
and the Crown Point both on Sheep Mountain.
have attracted the most attention. There are two
,melters in Kokomo, one of which is running
and treating about forty-ve tons of ore day. from
which it produces from ten to fifteen tons Of bast