Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1904-12-17

and nc the same time spread III evenly
over the bottom The benefit of this
is to be seen later on In the increased
rate OF leachmg aud better dIsplace-
ment of solutions which rs thereby cf-
fected. While the tank Is filling. "a so
luton of sodium cyanide is at the
same time soaking its way up from
below. and not long after the tank Is
fully charged the solution begins to
make is appearance on The surface.
IL is allowed to stand IN contact with
the ore for a number OF hours, during
which time most Of the gold ana silver
IL taken into solution This gold
and silver bearing solution Is now
drawn on from below and piped TO the
preclpitatIng room. After precipitation
the cyanide solution passes on to the
SUNNI tank. where ii Is brought up 20
strength again by the addition OF fresn
cyanide I'm the solid form ond pumped
up into the stock tanks by a centrliu.
gel pump, From here L IL led on 20
the top OF the ore IN the teaching tank
whore II completes The work OF eN-
traction. and 8t the same time, washes
out or dlsplaces the gold and silver
bearing solution retained IN the charge
The solution first brought into CON
tact with tho ore rs known as "strong'
solution and varies In strength from
tlme to time as the nature Il the orr
and laboratory tests would indicate.
There Is another solution In use too OF
a different strength-rOughly speaking,
OF about half the serength OF the first
and this Is called weak" solution. Be-
sides performing somewhat the same
duty as the other It displaces this
"atrOng" solution from the charge, and,
IN this way II can be Kept separate for
It's own particular share OF the work.
IN a similar manner, clean pure water
Is piped onto the top Of the charge ana
allowed TO filter down through for the
purpose Of removing the weak solu-
ton Each displacement OF solution
vases through metallic zinc, cut uu
into fine threads or shavings, and
there the precious metals are deposited
In the form Of finely divided metallic
shines, which are inky black In co'or
These shines are "cleaned M" uerlodl-
caly and after acid treatment ami
other operations incident 10 refining
are melted into bars Weighing on ON
average about 100 pounds each. Those
bars regularly find their way 70 Uncle
Sans Golfers, and are as regularly
converted into dividends PAYABLE 10 tho
Annie Laurle's fortunate shareholders
But to go back to the treatment OF
the ore IN the tanks, which was an but
finished when II was left; the values
have been extracted. the cyanide has
been washed out ana recovered md Il
remains 10 get rid Of the tollIngs IN
order TO make room for q new lot NJ
ore IN the tank. The gate valves are
raised, and a stream OF water fig d.
rected onto the taillngs which are thus
washed through the valves into large
wooden launders. These conduct the
talliugs To the plate house, situated I'M
medlately below the mill where The,
pass over q sorIas NJ amalgamatGl cop
per plates, Sufficient time Is civen I'M
slulcing TO allow any coarse particles
Of geld left In the tailings 10 come IN
contact with the surface OF the plqtor
and TO be omalgamatad and caught.
The scheme OF amolgamatioN after cv-
ending u novel one, so far gs
dry-crushed processes are concern
ed, but the wisdom OF the stem has
been more than conclusivelv proven
since It's adoption, The tailings. after
leaving the plates, are 1umed a con-
siderable distance and lmpouuded be-
hind dam, and 10 prevent Il from con-
tminatIng the waters NJ the creek
which flows mast the min. 4 rather
unique feature IN connection with the
disposal Of the talings Is the suspen-
sion bridge over which they PASS on
their way to the dam, for. as far as
the writer Is aware, IL ~ the only one
OF its kind IN use anywhere for "A ike
purpose II has a span Of go feet and
at the center its height above the creek
Is over 100 feet, II Is quite novelty
on the landscape and never fails To at
tract the attention OF the visitor to the
camp.
The pro- 'ss In use Is known as the
Macarthur Forrest cyanide process, and
that IL is well adapted TO the ore IN
question 90 evident when the record OF
the mill since It's commencement Is COIL
sIdered. Unlike many, the directors OF
the Annie Laurie company sncnt much
time and money beforehand I'M deter
mining Just what process or modinca-
ton Of process would be most suitable
and subsequent operations have amply
borne out all that was even promised
IN the preliminary tests by the Near
thur-Forrest representatives,
During October OF 1893 the position
Of acting manager Of the company was
rendered to and accepted by a. Il.
Hyde, Jr,. OF this city who had preyl-
ously filed the position Of engineer for
the company. His conduct OF the in-
terests IN his charge during that time
proved so satisfactory TO the officials
Of the company Mr.. Hyde was rendered
and accounted the posltion Of general