Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1898-11-05

How the ores 81 the DE IA Mar and April
Foot Mines arc treated.

tooi Miucs arr Treated.
Editor white Of the Beaver BLADE,
this week furnishes hia readers with the
following. Interesting letter from DE
Lamar. New;
De Lamar. Nevada. Ia certainly en-.
titlcd 10 take front rank among the
great gold producing camps Of western
America. True, 1t is not klondikc.
nor sc, a Coolgardie. but as steady
producer " the yelluw metal. Fcrgu-
son district. IN which De Lamar Is sit
ultcd, IA certainly 10 the lead.
While there arr scores " mining To-
cations In the district. yot. az IL generals
~ the case In most mining camps In
the West there are hut two or thrive
that can BE- worked with any degree Of
profit In this case the paying mines
are known respectively as She Ferguson
or De Lamar mine. the April Fool and
the Magnolia. OF these the first named
10 by TAR the Richest and most cxton-
aivcly worked. The mine was original
ly tapped by ten working tuunc 10. COM
nccied by miles upon miles of drifts,
Slopes and ndlts, In the Interior uf the
mountain. The caving in OF some OF
the workings has reduced the number of
tunnels by onc-half. yet enough remains
TO produce 400 tons VI medium grade
gold ore every twcuty-four hours.
Connected with this vsritable bonan.
~, De- a mammoth reduction and cyan
lde teaching plant b. extract the pre-
cious metal from thv ore. The mill
proper consists OF thirteen crushing
Griffin mills. which have the faculty N
reducing the rock gauge 10 a hngngsa
rlyaIinE the nnust Hour and under this
manipulation the ore becomes an ALL
penetrating and almost impalpablo dust.
which ILLS the atmosphere OF tn mill
building. and hN proven Hlngularly
fatal go very many ~ the employee. no
less than thirty men having died from
the effects " the DE Lamar mill dust.
On the last three years. Post norton
examination VI some % the unfortun'
ate victims. show that the fatality was
caused IN every case by a complete
wasting away ~ the lung tissue, and
that when any fragment NJ tn breath
Ink urgiuH remained. n was completely
nIiUd up hy the dust" NltwIthftau1-
Ink this strange fatality. hardly q morn
Ing passes but what there are from
three 20 half a dozen men luunElng
about tho entrance To the min awaiting
a chance 10 BE- taken on In place ~ any
unfortunate who may have been taken
sick. W whose heart had failed him
during the night. ana who, 1H a cunsn.
qucncc. had concluded TO seek a les
hazardous occupation. hut return O.
the mpiua opernndi.
Tho pulp NJ dust N conveyed from
the "Oiinfi' ur grlndlnE mills o. the
bleaching watts " which this mill pua-
aesaca no less than O. of capacities rang
ing from ~ g. 30 tons who're Il II sub
Iocted 60 an ncuucluH solution NJ cyanide
of potassium the uurilcruun sediment
being uttered through the bottom u
the tank from which Il " drawn BY a
vacuum pump 60 n nrccipituting tank
and thence into the hands " the meltcr
nt the furnace. This IN brief o. with
few notifications the Deiamar COM
pany'r method Of extracting the yellow
metal from the mother rock
AZ the Arril Fool mill the process
varies considerably from that described
above, the last named company having
adopted the wet process throughout.
naying O. per cent u the metal contents
the gauge BY flooding u directly
from the ordinary stamp battery over
double set o. Hiiycr,d copper plates
from whence II N conducted 60 n set u
teaching taakn where the cyanide so
luton saves an additional ~ VI 80 per
cent. thus almost entirely eliminating
ana saving the golden contents OF the
rocks.
OF the net value ~ the bullion out.
Put Of the two mills for obvious rch-
rona but little can be learned. but II ID
estimated that the Delnmnr produces
$4,000 90 $4,000 monthly. while the
April Fool sends out not quite one
eighth OF that amount.
That the latter will shortly augment