New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1852-01-08
Quartz 1Iining-Further Results-Thc Grass
Valley Gold Mining Co."-Saw Mills, sc.


ton of my letters Quartz Mining, find greatly
increased attraction of the public mind to the sub
ject and desire for all the authentic intelligence
that is obtainabe, going TO establish the facts as TO
its pIoftableness.
beg therefore, to offer for your paper another
extract from letter received by the Georgia, giving
later results of the quartz mills now IN operation At
Grass Valley. The letter is dated
"NEvADA CITY, Wednesday, Oct 3D. 1851
" ! have but moment to write, but I'M
Prove that 10 give YOU few items that may DC OF
interest The feeling IN relation to quartz leads
Is firm, that profitable mining must, In the end re-
solve itself INTO the working OF this roc X. Dlscoy
cries of veins or less nch, are reported weekly
i might say, daily and large amounts OF machi
merry Will be ready for bringing into the mountains
"The results ofthe quartz mills, far they have
been tested III THIS section, are highly satisfactory
have been told, by the builder OF Peck & baGrave'S
mill that 1t has crushed 10 rock that has not yielded
as high as one hpldred dollars per tUR. Collins
know, is working wen that yields from 500 TO
$500 per tun. Hagan'S mill, with five stamps, last
week Averaged eighteen kOdred daiiors per day. Inc
Gold Tunnel, at thus place, averages from $1,000 10
81 f,eo cav but does not crush over 1--WE tuns the
"My own faith in the business IS stronger than
ever. But OF one thing am convinced the machln-
cry should be tetter and teaU,er than any tina.
the country now nill that can crush fifty tuns Of
rcck in cay viii be Of no more expense in runolng,
wren once up, than one that brushes only hteen or
twenty tuns You VIII consult your own interest by
point OF flush and power
Yours, &c, J. j. SYKES.
J. NINcHEsTER, Esq.
By the above 1t viii be seen that my former state
merits of yield are more than coIoborated by the
latest intelligence from that section The want,
however is for machinery OF greater power, ana
more perfect sdapabiilty forth business and TINS
&c srfeIatum | shall be able TO supply so lar as my
own company l. concerned. The machinery now be-
ing conslructec for the " Grass Valley Gold Mining
Company uH pui'tri-s bstuee1 one mt ttco hundred
a -[.fr ia
is an enormous power, and operated upon rock such
as the mills at Grass Valley are at this time crushing,
as stated by MIR. Sykes, WILL GIVE VERY FAiR
PROFIT | prefer each individual to do his own
"cypheIrg" in the case.
Another great difficulty In the way, at the present
time, is the imperfect amalgamation OF the ores.
1t Is generally conceded by all the mill owners that
less than half the gold is obtained On this point,
late number Of The Ner1da Journal gays:
awe do not believe the present system Of amalga-
nation is adequate The matchmaking process IN
Chill is frequently continued fortnight IN one !ot
of tapgs and there is no gold that can escape the
grasp OF quicksilver when adequate opportunity Is
given for amalgamatlon.
The Picaylue, OF san Francisco, In aiusion 10 the
same difficulty, Imperfect amagamationI states as
follows The great difficulty which the quartz
miners have heretofore had TO -encosntef, has been
the imperfect amalgamation d! the quicksilver with
the gold after the rock has been puiyenZed Com
plaits OF the escape Of the gold have been UNIVERSAL
ard no remedy for II has as yet been found
There can be no doubt that the difficulties now ex
isting In amalgamatlon, Will be very materially II
| not wholly. overcome by more perfect and sclenIlnc
me,hods-ln the accomplishment Of which many
! chemists and ingenius men are studously engaged.
have devoted much time to Investigations on ms
point and am in correspondence win one OF the
sfle chemists IN the United States who il sangulne
! ofcompleie success. Among the new contTVances
| for amagamaton, have very high opinion Oh the
| Centripetal amalganaior, invented BY ARNOLD BUF.
Fu. ESQ of this City. Mr. DuHum claims, ana
/ with show OF reason, backed by experiments of
satisfactory character, that his u! sGrs
/ all tie gold that Il wcIks with great rapdlty, as
well upon the quartz ana as upon we hes,iI ps
sand found in all the surface wash,ngs MT bnhuih
! describes The principle Of his machine thus
This is an application Of eenirlpetal power a.
/ the base OF whirlpool a principle no, re;oShtLeu
by scientific writers, and never before oroughl u1o
Combination with harmonious mechanical arrange.
meRt for any purpose whatever. BY tms power
aurelOus matter Is carried IN posiINc con.acs WI
quicksilver over any desired distance, uhui ue da
heslon OF quicksilver sinks the golu ~ dHtatSW",
while all beside is washed away, and the quicksilver
s never broken into globules and none OF II Is lost
The machine has been abundantly tested 20 the sat
ssacon and admiration OF those who nave wine
1t. II is very light, compact and simple, WIN no ia
J bty to cake choke up or get out Oh oroef.
/ Ihave seen the operation Of Mr.. Bufums Anal
gsmator, and certainly i promises 70 pcfloia az
that is claimed for IT, shall contract for the use OF
his patent ard give il trial, IN the conhdeht oeuel
OF being able 10 increase the product OF goid Oy a
handsome per cent. above that now oOtahiee. y
needs but that this be doae TO f'Eos the pfo's VI
As have SAID before, no man can fuzzy estiinsIe
the vast importance of the California Quartz Mining
Business, when powerful machinery, Win acequA !.
capital and science is applied 10 ~ In auu ,sI ~
,he tesvy machinery 10 be used BY the Grass Valley
Company. there is TO be attached saw mlii WORKED
BY the same steam engine. The demand for tln9er
with the facilities for It's rnanuiao'uis, wiz 80 %
this source of considerable pro1t. peg ies'S W
ave in this connection though rather OF personal M
teres, to myself and associates the i9lloSing .e.e
from gentleman whose opinion is vaiuaote' ana VINO
stands high in the estimation OF all VINO MO" n,''
Wrnn,rroy,.N.Y Y, Friday, Dec 10, 1881.
wr~ruvs-ve ESQ Dear SIR understand you
aye intending TO cut your pine lumber al Grass a.
ley by means Of circular saw ,,
My business for many years pas, an In % - and
saw mills. The best mills-for small timber, iee'
and under-cu. lumber with gang saws eol are ca.
pensive The circular saw mills WIZ 90 gre .sa
amount Of worn than any other IN proportion 70 Tue
expense Of erection, although, according 70 my m
Sormation tbey REQUIRE the very utmost care OF a