1000000030

In.l Ihe

(eori~,

\VI,ich \ViII be

~radually

proJueeJ by Ihe

bJ as il IlIrnS

lilha"ge, \ViII be elriV<1I lo IheliJe, 01'

Ih-. cupd, anel

illlmeJi~lcly alll~rll,d

!ter.uy

. Al Ihe

folllle IIIU< Ihe cupe! will

JIl'

'Ole a yellolV, brown, or

bl.lckilh eolour, leeording

lIle 'J"IIllIily am! nllure 01'

Ihe (coria imhibc'¡ by

it.

WhcII you Ice Ihu matter in Ihe eupel in

.iolenl e·

bullllion, ,Intl emilling mueh (moke, lower Ihe fire by

Ihe melhods (ormcrl y prcferibed, Keep

"1'

(uch a dc–

cree o( hc.. only 11m Ihe I'moke whieh

a(~cnds

fromIhe

mmer moy nOI rife "cry h,&h, .od Ihal yOIl may be

~ble

10 dillingui!h Ihe coh\Ur whieh Ihe ellpe! .equires (rom

Ihe (eom,

Increa(c Ihe fire hy degrees, as more Md more li–

Iharge is (ormed anu ab(orbe,l.

f Ihc regull\s ex.mineu

byIhis Rlr.y coolain no fi lver,

)'o~

w,lI (ce illurn wholly

inlo (CUdl , and allall di(APPc.u. \Vhen il conlains fil–

"er, and Ihe qUJnlily o( Ic"J is mueh dimini!hed, you

will pmeivc !illle ,i,'id itires, or bea\lliful

r~in· bow

co–

Jours, Olooliog (IVi¡'\ly along in fur(m, and erolling m h

olher in many dilrm nl dirett,ons, Al lall, wheo all

Ihe lead is ddlroycd, Ihe tllln '\,trk Ikin, Ihal is eonli–

nu, lIy prOtruded by Ihe le.d

hile

i, lurning inlo li–

Ihuge, und whieh hilherlo eonreu Ihe

filver,

(uddenly

die.ppem

.nd, i( al

IIIIS

mo:nenl Ihe hre happen nOI

10 be IIrong cnou h 10 keep Ihe f:lm in (ulion, Ihe fur–

(ace o(

11m

mwJ \ViII nI once um OUI

(Inzzling r"len–

dar ¡ bUI, ir Ihe fire be firong enough 10 hep Ihe fi"'er

in (ufion, Ihough (reed (rbm all m'xlUrc of lead, Ihis

ehanlle of colour, \Vhieh is called il!

/1//gl/raliC/l,

will

001 be (o perceplible, aod Ihe film will nppm like a

bu" of

lire,

The(c

phcnolnen~

(bew Ihal

I~t

operalion is (¡ni!hed.

RUI Ihe cupel mull Oill be Idl

mlOUle or 11\10 under

Ihe mulRe, . ud Ihen drawnOowly0\11wilh Ihe iron hook

low~rus

Ihe door o( Ihe

(urn~ee.

When Ihe film is fo

cool,d

10 be UI IlloderJICly red, you may Ilke Ihe

eup'" (rom under Ihe mulRe wilh yoor Jillle longs, and

in Ihe m,ddle o( il! (¡.iIY you will find.n exeeeding

~hlle

bud o( filvrr, Ihe lower pm wbcrcof wiJl

un–

(qull, and {oll o( hllle pill.

r o , urifj Si/v:r h, Niln.

GUHu~An

Ihe Glver 10U inlend 10 purify, or re–

duce il 10 Ihio plms ¡ pUl il Inlo

good erutible ¡ .dd

'" re10 a (ou,'" pan

weighl of my dry pul.eri(ed

. ure, mi"d wilh hal( Ihe weiuhl o( Ihenitre o( ca!cined

ne·le s, and aboul a fixlh pm of Ihe (.Ole WJighl of

(ommon

gl.fs

in powckr. O'" Ih,s cruclule wllh an–

olhr (rueíble ioverted; which ",uf! be of fueh a Coze

mil

ill ",nulh nuy enler a 1,"le WAy inlo Ilw o( Ihe

Io\ller one, and haye il' bOllO"' pierced ",ilh a hole of

. boul

lines iDdi.meler, LUle Ihe Iwn .;rucillles 10-

~Iher

",ilh

ciar

100

Winu(or-Iou,.. WIen Ihe hm

d'l, pla Ihe c,ucibles in a mdling fu'nm . Filllhe

(urnlce " ilb

rilo\!

al, laUne

CHe

howe..r Ihal Ihey do

nOI ,i(e abo,c Ihe uppn 'o Ible.

Kmdl. Ihe fire , and nn e your .crTcls o( a middling

red hUI. Whtll Ih. jle fo, I ..lc up wllh Ibe I nlls a

h•• coII, Ind hold il oYer Ihe hole o( Ihe urper er.eible.

J~u

IIlImtdi Idy pmcive a fmd

(~I,odur

10uDd Ibe

y ,

I jI

.coal, and al Ihe fame lime hm a gentle hilling noife, it

'5 •

Cogn IhAI the fire is of a proper flrenglh·¡ and il muft

I.epl.up

allhe (ame degree lilllhis phenomenon cenfe.

Then increafe Ihe fire 10 Ihe deAree requifilC10

ke~p

pllre filver in fufion ¡ and immcdialely lake your vell'ds

OUI of Ihe furnace, You will find Ihe filver ar Ihe bOl–

tOmof Ihe lower erucible eovered wilh amaf, of alknline

feo"" o(

greeni!h eolollr. If ,he mml be nOI rendered

perfettly pure and dutlile by Ihis operalion, il mufi be

repMld a feeond lime.

r o

d;¡'/v~

Si/vtr in

Aqlla Fonil,

and Ihmh,

foPara/~

il[rolll

(lJer!

olh" flUlallim Suhjlanu.

T HE film you inlend 10 dilrolve beine beaten inlo

Ihin

pl~les,

pUl il inlo a glar, CI,curbil ¡ pour on il Iwice

ill weighl of good preeipimed

afua¡mll

eo.er

Ihe

(ueurbil wilh a paper, ano fel il On

fand·balh mo–

derarely heated. The

aqlla¡orliJ

will begin 10 d,(folve

Ihe fllver as foon as il comes 10 be a li",le warm, Red

vdpours will rife; and from Ihe upper furfam of Ihe

CoI.er

Ihm will feem 10 ill'ue fileams of lillJe bubbles,

a(eending 10 Ihe 10p of Ihe liquor, belwecn whieh and

lhe Iilver Ihey will forOl, as il were, n nUOIber of fine

eI"ins: This is a Cogn Ihat Ihe dilrohnion proeeeds duly,

aod Ihal Ihe degree of hcal is rueh as il ouehl lObe. Ir

Ihe liquor appm 10 boil and be aeimed, a great m1ny

red "pour! rding at lhe fame lime, il is a fign Ihal Ihe

hm is 100 grent, and Ihould be lelrened lill it be re–

duecd 10 Ihe proper degree indicated above: ha.ing ob–

lained Ihal, kecp il equally up IÍII no more bubbles or

red varours aprear.

[f your filoer be alloyed wilh gold, Ihe gold will be

fouod, wheo Ihe dilrolulÍon is fini!hed, al Ihe bOllom of

Ihe vell'e! iDIhe form of a po\Vder, The folulÍon mufi

now be deeanlcd while il is yel warm : on Ihe powder

pour half as much rrdh

"9"a [orliJ

as before, and makc

i, boil ¡ again deeanl I"i. fecond

19ua

flrliJ,

and repeal

Ihe (ame a Ihird liOle ¡ Ihen \Vilh fair waler \Va!h Ihe re–

maining pOlVder well:

\ViU be of a brown eoJour in–

elining 10 re.1.

r o[tparalt Silo" ¡rom Iht NilrDl/J

,{cid

DIjlJllalion,

Cr,j1u/J

Si/wr.

'fh~

¡./trna/ SIOnt.

[no a large, low, glafs body, pOI tbe (olulion of fil –

ver from whieh you inlend 10 feparate Ihe Glver by di–

nill~lion ,

To Ihis body fil a IUbulaled hcad provided

",ilh iu fiopple, Sellhis ¡Iembic ina

f.nd

b,lih, (o Ihat

Ihe bodl' may be almoll eOftred \Vllh (and: apply a re–

revcr, anddifii!! wilh a OIodeme hcal, fo Ihal Ihe drops

may fucceed eaeh olhrr al Ihe dinancc of fome feconds.

If Ihe reeeiver gro.. ycry hOI, check Ihe /ire. \Vhen

red vapou,s begin 10 aPllear, pour ioto Ihe ¡Iembie,

Ihrough Ihe hale io ill head, a (re!h quanlily o( your fo–

IUlion of filver, 6rll mw.: very hOI, Conllnue d,n,lIIng

dll~

manner, and repcaring lhe addillon o( (re!h li–

quor,

1111

aJl your foJulion be pUl 1010 Ihe alemb,e,

When yuu have no more fre!h folulioo 10 VUI in, _nd

when, Ihe pblegm being all come over, red upoUI$

beg,n agatn 10 appelr,

eon.ty

InIOIhe alemblc half a

drtlll 01

dum

I 110\\',

¡lid

dJfiill l

drmef,

wh, h

beiot