The Black range., 1884-01-04
FULL RETURNS
From the Black Range Ores Treated at the Colo.
RADIO Coneentrstor.

I
been received from that gentleman and
given below in his own language. The
The assay samples were caught from
the pulp passing through the machine
at the rate of two tons per hour. Mr..
Castle had the best experience he could
get to assist him in making the trial
and there is no guess work about any
thing he did in this connection. The
cOncentrator which he tried at Black
Hawk, as he found it, failed entirely to
accomplish that which it was expected
to, but additions and changes were
made, until it worked like a charm.
Three weeks were consumed in expert
menting and getting the ten tons taken
hlther run through in a satisfactory
manner. OF the ores, competent mill
runs assert that all these shipped by
Mr.. Castle are concentrating ores, some
of course being more difficult than 9th
ers. The assays were made by the
chemist of the Agricultural college at
Manhattan, Kansas, and there could
be no prejudice nor bias entering into
his work. The following are the assay
returns and Mr.. Castles remarks con.
cernlng the workings of the individual
ores:
Silver Monument, works No. l in
every way. Through concentration,
95 per cent. saving; value So ounces
silver; runs twelve tons to one. Sample
bags of first-class ore run $397 per ton
silver.
White Signal, works first-class, es-
pecially that from the tunnel: 80 per
cent. saving; value 80 ounces sill
yer. That from the shaft was also
good ore and Of good concentrating
quality: value AZ ounces; can work it
close.
Black Knight, some loss of blue and
green but general saving good; 81 per
cent. saved; value "a ounces silver
with larger amount can adjust the ma
chnery to work and save nearly all.
Colossal, works No. in every way,
through concentration; 93 per cent.
saving; value 30 ounces silver; runs
twelve tons into one; can use TO advan-
tage.
Dreadnaught, when there was any
separation of mineral In the ore good
concentrate w8 obtained; with MINER
al mnutely diffused it all came through
as concentrates, or if water was strength
ened 1t all passed away III waste; ore
Will have to be sorted, then it is good
concentrating ore; value A pz silver !;
with care can save 80 per cent. and run
seven or eight tons to one.
Palomas Chief, did not get the ma
chineIy adjusted to save any ore; but
upon examination by mill men they
say it will run and concentrate well.
BY hand trial good separation was OBJ
tanned; value of sample 26 ounces sill
yer; can work it by care.
Defiance works very fair; some loss
of blue ore the value of which was q
ounce silver; 80 per cent. saving; value
of sample 81 ounces.
Midnight, irst-class; can save the
full limit; all black oxides also; value
377 ounces; can run twelve to one.
Little Pittsburg, only fair; blue and
green difficult to save, so per cent. a
good amount of saving; will run near
40 ounces.
Monte Christie, works only far; blue
and green difficult to save; can save
almost so per cent. of mineral; value
of sample taken SO ounces
Silver Glance, good; will save up to
80 per cent; some loss of green and
blue; value 43 ounces; can run ten to
one.
White Shield, good; concentrates
well and with little loss; value 81 oun-
ces; can run ten to one.
Copper Belt, not so good as the 9th
ers; could not adjust the machinery to
so small an amount of ore; can give no
definite report. A fuller test will be
necessary when the machinery is in
operation; value 23 ounces.
Alta, by care can concentrate, but
can run but few tons into one; as with
all the ores containing blue or any
green the specific gravity of those col
ors is so slightly different that it will
make a dirty concentrate; value of
sample 81 ounces.
Buffom, only fair; when mineral
is diffused it is almost impossible to
concentrate, but when it is separate
from the gangue it is all o. K; value
Al ounces.
Blue Dandy, works very fair; some
loss Of blue ore; value 81 ounces silver;
can save So per cent. and can run s to
tons to /.
Readjuster. good ore to concentrate;
like the Colossal as to concentrating
qualities; value 81 ounces; can run ten