Calaveras chronicle., 1851-12-20
STOCKTON IRON FOUNDRY

y --lMfOhIANI III MIN EhO II! -
BIRDSALL 6 CO., of Stockton, have their
Iron Foundry now in full operation, and
are now prepared to oexecute any orders that
may be given them. Amongst others, they
are prepared to execute orders for the fol-
lowing machinery for working Quartz
OsrRANnRR'a PATENT GxRATING ANAL
GAMAToR,
As well as Ostrander's Gold Separator,
for separating gold without water or quick
silver.
The Mills have been constantly in our
hands since April last, since which time our
daily experiments in Quartz, and full ac-
quaintance with the hitherto imperfect kno-
ledge of extracting the metal therefrom, has
resulted in the certainty of the success of
these mills over all others. The main thing
for success in the amalgamation of gold, is
the form given to the particle of gold after
it is detached from the Quartz, and the
nearest it is brought to a round or shot
shape, the more easily it is brought into
contact with quicksilver. The form that
gold receives in passing through our mills,
is that of wire chopped into small pieces -
These Mills are supplied with boiling ap-
paratus, which Sits the ground Quartz, so
that when it goes to the Amalgamator, it is
like wheat -four in fneness. The Amalga-
mator has motion like that of the Battea,
Ealthough its form is q circular bowl with o
| rise in the centre, through which passes a
shaft, the bottom of which is round ball
which works in socket, and the upper part
of the shaft works in the slide of an oblique
crank, which is regulated by pin holes for
the shaft to rest upon-in this way the shaft
can be guaged so that varying the speed of
the machine will not prevent the contact of
the quicksilver and the gold. Into this ma
chine are placed three so lb. iron balls,
which are constantly revolving, producing
q current which draws the gold into the
quicksilver. These machines require 25 to
80 pounds of quicksilver, which may remain
in use for q week, or can be drawn off daily
if necessary.
The price of the smallest sized Mills,
with Boulting apparatus, together
with an Amalgamator, is $500
For the Amalgamator alone, l,25O
For sevUnd size, 10 inch mills, with
Amalgamator and Boulting Appa-
ratus complete,- 5000
For horse power, 10 feet wheel and
pinion, ,---s 400
The power of one horse is sufficient for
two small Mills, and two Amalgamators,
SC.
AWO-uOrSe power 1S 0uly Tequlfeu IOf 0acu
of the larger Mills, Amalgamators, &c.
The small mill will grind from 200 to 800
lbs. per hour. The larger size will grind
1O00to 1900 lbs. per hour.
Our pumps we expect to raise from two
to three hhds. Of water per minute. They
are constantly discharging 3-inch stream
Of water. We have not yet made the full
test, but think one man can force water to
the heipht of sixtv feet with tboD, We
have always on hand large amount of
quartz rock, so that we can exhibit the
Mills to those who wish to see them tried.
Our terms for these Mills are, one half
Cash paid on signing the contract, and the
balance on delivery
All the grinding surfaces of the above
Mills are chilled
Our price for Castings is the same as at
San Francisco. DEPOSIT of a part of the
cost is required in all cases, before orders
are undertaken.
STOCKTON FOUNDRY, on the Peninsula.
Stockton, December TO- dI3 If