Custer weekly chronicle. [volume] (Custer City, S.D.) 1890-1931, 1892-06-11


wish 70 say By way Of introduction.
that hase found Mr. Porter . careful
and skilfnl assaysr, and the experiments
and tests described In his communics
tion, only 60 TO coafrm che many test
returns received from abroad, whenever
this our commonest class of ore has
been subject 10 treasuusas BY sciesisifc
mon. e. w. r.
Custer City, 8. D.. June 7th 1892.
Ihavs made very careful examina.
ton of typical Custer County ore, and
herewith give the results. The ore was
sslscted By N, self from tho surface Of
thses different lsdges. and consists OF .
crystalline quartz with free gold. little
oxide Of iron snd = very small quantity
oftsliurides, with no pyrites. Careful
assays Of the mixed ore gives its value
a. S39,27 per ton. A free milling test
produced at the rate Of $I0,25 per ton.
or 20 per cent OF the assay value. A
concentration test Of IL. 7 tons! into
ton. gives o concentrate worth t239. So
per ton, saying Al per cent or at the
rate Of SIC 80 per ton Of ore. Another
concentration test Of Z. IS tons into
ton gave . concentrate worth $l65 SO
per ton, saving 81 per cent or at the
rate Of $22 50 per ton Of ore. A sample
tested by the improved cyanide Of
potassium process yielded at the rate OF
$s.27 per ton or saving Of 2l per cent
Of the assay value. A sample tested by
chlorinstion without roasting yielded at
the rate Of $s3.07 por ton, or 81 per cent
Of assay vslus.
The above concentration tests are not
as good a. usually obtain, but this is
surface ore and the probabilities are
that as depth 10 attained and ore he
comes more pyritous much batter 70.
suits viii be obtained. In regard TO the
cyanide process I have never had .
better result than SO per cent Of the as
say value on this class Of ore. I have
however had results as high rs 80 per
", somewhat different in character
from the ore in question. There are
some ores here that can be treated sue
cessfully by the cyanide process, but
they ara ores that will prospect little or
none in the pan. consider the proper
process for treating the gold ores Of this
locality to bs "as follows" For high
grade surfacs ore. freemilling and chlor-
ination. For low grade surface ore,
freemiiling. concentration and chlsrina-
ton. For the deeper pyritic ores con-
csntration, roasting and chlorinstion.
Respectfully.
49, Id. Porter.
Chas. NJ. Ankeny, Of Rapid City will
contend in the courts for . ons.third
interest In the Keystone mine. The
papers have already been served on the
present owners. William franklin and
John F. Reed, and the complaint alleges
that in 1883, the defendants agreed to
give the plaintiff one third interest in
the property in consideration for Ger.
tain work which was to be done, that
the work was done, but interest never
decided to the plaintiff. The threatened
litigation will probably interfere with
the Minneapolis parties who were con-
templsting purchasing the mine. II 10
earnestly hoped that some such settle
ment N was made in the Spokane case
may be reached.
DEADwooD. June a-Specisl: The bul.
lion shipment for the last half Of May
from the Golden Reward Mining COM
pany and the Homestnks Mining com
pany Of $4,000 Was shipped out today.
the former company contributing $780,.
600. the latter the balsncs. This 10 one
Of the largest single monthly shipments
from two mining companies ever made
from this section. The shipment for
next month will doubtless double this,
~ the recent new 6nds OF ore which tie
company is new working assay In value
about double that heretofore worked,
WILL M THOROUGHLY DEvELorKD.
The r tia tin mine. which WAS the first
enc to bs worked in the southern Hills,
and on which work was discontinued
several years ago. Is now going to be
moro thoroughly developed. Although
II 10 rather difhcult to got the exact facts
in regard to the company's attentions.
Il h quite generally understood that .
thousaud foot shsit will bs sunk On the
ledge and numerous cross-cuts viii b.
made. The large machinery which will
b. required to sink I 600 feet 10 expect.
cd TO be srscted 1t the Eta inside Of
the next moath. A large tin mill II al
rsady erected st the mine and at one
time II reduced good deal Of ore In
dependent
THE MINERAL niLL-
The directors Of the Mineral Hill
Gold Mining Company entered into
contract With Ernest Fish and Nathan
B. Wilcox for the erection Of . stamp
mill on the property. The mill ID TO bs
completed and ready for operation by
the frst Of August, and will b located
at tha mouth Of Hsndsrson sulch.
Theodore Rsdsr, who has the contract
for the lumber. viii commence deliver.
Ing IL to-day on the grounds. II b the
intention ofths gentlemen 10 put In
facilities and power for opsrstins twenty
stamps. but st the present time only
ave will b placed In position. The
min has been ordered from the Gates
Iron Works Of Chicago. while the en-
sins and boiler viii b shipped from
Indianapolis.
/ Il u the intention af the Rsntleman