1000000030

which at lan hinder the Col

ven!

from aéling on the re–

mainioH pan of Ihe metal; and Ihmfore Ihe liquor

fhoulJ be maJe 10 boil, aod lhe veni·1 fhoulJ be fhakeo

to renlOVe IhoCe impedimeDts, by whieh medns all Ihe

lead will be dln'olved.

MERCURV.

r o txlrafl Mereurj [rD/I/ il/ Ort,

lo rtviviJj

['0/1/

Clnabar.

PU~VtRIH

Ihe

ei~abar

from which you would ex–

triél the mercury; wilh this powder mix an equal part

of clean iron lilings; pUl Ihe mixlure into a relon of

glaCs or iron, leaving

leatl one lhird pan thereof

emply.

Se!

Ihe retOrt Ihus prepmd io a fand·bath,

thal itl body may be quile buricd in lhe

C.nd

, and its

neek decline coofiderably downwards: lit on

receiver

hall fillcd wilh water, aod let Ihe oore of Ihe rctoH co–

ter .bou t

h.lf

ao ineh inlo Ihe wmr.

Heal the velfel ro as 10 make Ihe reton moderalely

red. The mercury will riCe in vapours, which will con–

deofe iOlO liule drops, and fall inlo Ihe water in Ihe re–

ceiver. When you Cce Ihat oOlhing more comes over

wilh Ihis degree of heal, inereaCe It, in

~rder

10 raiCe

whal mercury may nill be lefl. When.1I Ihe mercury

i. Ihus brougbt over, take off Ihe receiver, pour out Ihe

w.ler eontaioed in il, aod colleél lhe mercury.

Mercu. y i. never mineralized in Ihe bowcls of the

u nh by .ny Ihing

b~t

Culphur : with which il forms a

compouod of a browoifh red colour, known by Ihe Dame

einabar.

1ñe

olden aod richen mine of mercury is Ihat of Al–

maden in Spain.

i. a fingular propmy of lhal mioe,

Ih'l lhough Ihe mercury fouod io il is combined wilh

Culphur, and in Ihe form of cioabar, yel no add,tameot

i, required 10 procure lhe Ceparalioo of Ihefe ,wo; lhe

canhy and nooy maller, wilh which Ihe particle, of lhe

ore are ineorpomed, being ilCelf ao excellenl abforbenl

of Culphur.

lo Ihe quiek-filvH work, carried on al lhis mine Ihey

make 00 uCe of relom. They place lump' of Ihe ore

00 ao iroo gme, which n.ocls immedimly over Ihe fwr–

oaee. The furoam which ferve for Ihis operalion are

c10Ced al Ihe 10p by a Con of dome, bchind which fiaods

Ihe fhafl of

chimney Ihlt communicalCl wirh Ihe 6re–

place, .od givc, veOI 10 Ihe Cmoh. TheCe furoaces

hate 'o Ihelr t'ore-fide fixlceo aperlures, 10 eaeh of which

IUled ao aludel io

honIooul pofilion, eommuOlea–

ling Wllh a loog row of olher aludels plaecd l,kewiCe in

In bonzODlal dtreélioo; whieh .Iudels fo eonncé\ed 10'

gcther fo.m one long pipe or c.nal, Ihe funher end

whmof opcns iOlo

eh.mber dellioed 10 recei,e and

condenCe

~II

Ihe mcrcumJ vapours. Thcfc rows of alu

deis

Ir<

fuppor!ed from end 10 end by a temfs, whlch

runs from Ihe body o( Ihe building, whcrcio Ihe furnms

are m(led, 10 Ihu \IIhere Ihe chambm are buih Ibat

pcrfurm rheolfice of reeei,CIS.

hlS

'uy inStnious contrivanee, and Cavtl much la·

ur. e pente, and Irouble, Iha¡ WQuld be UD foidable

if mollS

ere cOlploycd.

OL.ll

. o.

35·

137

Thal par! of Ihe furnace \IIhieh contaio! the lump' of

ore, ferves for lhe body

Ihe retorl; lhe row of alu–

deis for il! neek; and lhe little chambers in whieh d,eCe

eanals lerminale are aélual reeeivers. The lerrHCs of

of eo,nmuniealioo, whieh reaehes from Ihe one building

10 Ihe olher, is formed of lWO inclined planes, Ihe 101\1-

er edges of whieh, meeling in die middle of Ihe ler–

raCs, riCe (rom Ihenee iofenfibly; the one quile 10 Ihe

buildiog IVhere Ihe furoaees are, and lhe olher 10 Ihat

whieh form! lhe reeipienl ehambm. By Ihis means,

when aoy mercury efcHpes through Ihe joints of Ihe alu–

deis, il nawrally runs down along IheCe ioclined planes,

aod 1'0 is colleéled in Ihe middle of lhe lmar" where

Ihe inferior fidcs 01 Ihe planes meeling logether form a

Con of eaoal, OUl of which il is eafily lakeo up.

r o give Mercurj, bj Ihe aflion

Fin,

Ihe appear–

ance

.¡

a lI'1elalline Cnh·.

PUl mereury iDIO Cevml lillre glaCs mm.lfe! wjlll

long aod narrow neek, . StOp Ihe matralfes wilh a

liule paper, 10 prevenl aoy dirt from falling inlo Ihem.

'el IhelO all in une rJnd·balh ,

Ihal they may be Cur–

rounded wilh Cand as high

lWO lhirds of Ihm lenglh.

Apply Ihe !lronge!l degree of heal lha! mereury can beu

will,ouI rubluning : eootÍoue lhis hea¡ wilhoul iOlmllp–

lion, lill all Ihe mereury be luroed 10 a red powder.

T he opemioo lans aboul Ihree monlhs.

Mereury lhus eoovemd 10 a red pOll/der i! knolVn iD

cheminry and medieioe by !he Dame of

mereorj

pndpi–

w d

je.

difo/ve Mmur,

Ih. Vilri,li, A,id. rurbilh

mineral.

PUl mereury iOIO a glaCs reIon, aod pour 00

thnce

its wcight of good oil of vilriol. Sel lhe relon io a

Cand-balh; fil on a reeipieot ; warm Ihe bath by degrees

lill Ihe liquor jun fimmer. Wi!h Ihis hm lite mcreury

will begio 10 dilfol,e. Conlinue Ihe fire in Ibis degree

lill .1I Ihe mercury b. dilfolved.

The vilriolic aeid dilfolves mereury pretty well: bllt

(orthis purpoCe lhe acid mull be very hOl, or even buil;

and Iheo 100 il is a very long lime before lhe dilfolutÍon

compie.ed

We have direéled lhe opemion 10 be per–

formed io

mOr!; beeaufe Ihis COIUlioo is uCually

CIII–

ploycd lO mJke anolher l'reparalion eaUed

lu/6lth /I/i–

ntral,

whieh requircs Ihal as mueh as poffible of Ihe

¡cid Colvent be

~bllraéled

by d.nlllatioo AUlng Ihm–

for~

dilfolvcd your mercury ID Ihe vilnohe acid, if you

will oow prep>re Ihe lurbilh, you mun, by coounuing

10 heal Ihe mon, drive over all lhe liquor iOlo Ihe re–

cciver, and dinill

1111

nothing remains bUI a while pow–

dery maner : lheo break lhe relon ; pulveriCe its

COD–

leOIl io a

gl.Cs

mortar, and Ihereoo pour common waler,

whieh willlmmcdialely IUl nlhe whlle ,"aller o( a lemon–

colour; wafh Ihis yelloll/ maller in 6ve or Gx w. rm wa-

1m, aod il w.1I be wha! is callcd iD m.Jicioe

lurM/~

mlnera/;

Iha! i" acombioa!iun of Ihe vllnol,e acid wllh

mercu. y, 6fe or

fil(

graios whereo( is

,iolenl purga·

live,

olIId

alCo

emeue ; qualll":s which il polfelfc. in

comman