1000000030

bined'wilh

31kJli illto a

n,/""

(1IlphllriJ,

it unitel there–

with \'ery rraclily. Nay,

iotim.'te i, their union, lhat

lhe gold by me. ns thcr'c,l bceomes foluble ill wml ; ami

lhis

II~W

cOllpoun,1ut'

~olJ

allJ liver uf i'ulphllr, beinR

diAoh'ed in \V"er,

\ViII

p.lI

! through the pures of bruwn

p'pel without rlllTa ing

~ny

clecompolilioll; which does

not hal'pcn , at Icatl in fueh a m.lnlldl dcgrcc, to other

met alllc fubllanees dilroh'cJ by livtr of lulrhur.

A"nolJ

/ttllllin,,,"

mixcd "lid melted wilh Auur of

rulphur lofes it s fulminaling quality: which a"fes from

hellce,

th~t

on this

oee~lioll

the fulphu r burns,

~nd

irs

aeid, \Vhieh is the fame \Vith the vi"iolie, being thereby

ret

libeny, becomescaplble of alling upon the gold

vitriolie aeid would; whieh, as lI'a, faiJ above, Je–

prives the golJ of ils fulniioatiog 'IUJlity.

SIL VER .

EX T

ta golJ, fil ver is lhe mon perfcél metal. Like

gold, it refins rhe utll10tl , i,,!cnce of fire, eveo

th~t

the foeus of a buroing·RIJfs. HOlVcver, it hulds only

the iceond place amollg mm ls; ¡'ccaufe it is lighter rhan

gold by almofl one h.r1f ; is alfu

rumcwh~t

le:i duélile.;

and I. Uly, bee;¡ule it is .élrd opon by

grealer number

of fulrents.

Y:t filver hath one advantage ol'er Rold, n.tmc1y that

of being a li!tle halda; whieh nlJkes it alfu mOle ro–

norous.

This meral, like gohl, begios tO Oow when it is fo

thoroughly pen:trated by tlle lile as tO apl'ear igniled

like alife eoal.

Whik this metal is in fufion, the

immedi.tc

eontaél·

of the I'Jpour of burning eoals deprivcs it almoll entirely

its m.tllcability, in lhe fame manner as \Ve obferved

h.ppens ro gold: bur both thefe metals eafily reeover

th>! proren y by bcing me1ted \Vith nitre.

T he nitrous aeid is the trile

fol~ent

filver, aod be–

ing fomell'h,t dephlrgmm d \ViII I'ery readily . n.·1 eafily

rake up

qu~ntiry

of lilver equal in weigo t to itfelf.

Silva thus eombincd with the nitrollS acid forms R

metallie r.r1t which fh ootl inlo er)nals, e.lled by the llame

f""a r

C~¡f¡.'¡f,

)fI.II

jifver.

Thefe

eryll.ls

are molf violently eauAie: arplied to

the Oóo, they quieklyafl'd l it mueh as a live eoal would;

lhe)' prodoce a hla.:kilh elChar, eorroding and entirely

,Iellroying Ihe pam they toueh.

Surg~ons

ufe th( m to

.w,'ythe rroud fungous flcfh of ulecrs . As fil ver u–

niled lI'ilh lhe nitrous aeid h. th the property of bl.cken–

iog all animdllilbllanees, a folUlion of lhis mm llic falt

i, tmployed

die hair, or orher animal matters, of a

ueaut if,,1and durable bl. ck.

Thcfc Gryll.t1s

Ro\V

\Vith a I'ery moderatc hw, and

even before they !:ro\V red Bcing thus me1tcd, lhey

(urm a 1.I.LkiOI 01:<15; .nd io this form they .re ured

hy furgeon. , undel' Ihe ti<l6 of

InpiJ ¡,,[<mafil, ill[<mal

jI~IJr,

Jiltl~r

((lTlflic.

Silver is alfi. dilfolred by the vitriolie acid: b", then

the aeid mufl be con.cotratCJ, aod in quomity double

lhe weight of the r.l vcr: nor will the folution fueeecd

'I";t!wur a coofider.,ble degree of heal.

Spi;it of fal t and

agua

(,gil,

as weH

a.¡

the other a·

eids, are ine.paule of

d:¡;~lting

this metal, Rt

the ordin.rry

w.ly.

Thollgh fil\'er be not foluble iu the aeid of fea·falr,

nor e,fily in the .eiJ of virriol, as hath jull been obfa–

,'ed ,

doth not (ollow,

th~t

h.th

bUI a 'vcak aAioity

wllh the I:lmr, and none at all with the forlller : on the

eOnltary, i( "PpcJCS from experiment, that it hath with

Ihcfc mo aeids a mueh grwer atlinity th,n wlth the a·

Cid of nitre: whleh is lingulJr enough, eoufidering the

foerllty wirh "hidt this lolf acid difiolves it.

The expcliment which prol'es lhe f,él is this. To a

folution

01'

film in the nitrous , ei,1add the aeid eithel'

?f v!lriol or of fea·faIr, and the fi lm \ViII ioflantlyquir

ItSntlrous

folv.nt

to joio \Vith the fuperadded , cid.

Sd"er thus ulli ted with the "itriolle or the marrn: a–

eiJ i, Icfs loluble in water than when eombined IVith the

nitrous , cid: and

ti"

this reafun it is, that when eilher

of thefe I\VO aeids is aJdcd to

folutioo

film, the li.

quor immcdiately bceomls whitr, and a preci pit..le i.

formeJ, whieh is

other than the fil "e r u"ited with

th~

preeipitatiog aeiJ. If tbe prcópitdlion be

~fI'dled

th.

vitriolie acid, the preeipitate

11'111

dir.' ppear

upo~

addir.;:

a ruOicien! qUdn!ity of water, ueedufe there wllI then b:

water enoltgh todllrolve il.

Bttt

the e"fe is

o~t

the fame

when the preeipitalion is made by the marine aeiJ : fur

fil~er

eomuincd lherewith is bree folltble in water.

Thls preeipil.ltC oflilver prlleured by me.los of the ma–

rine

~eid

is vcry eafily fufeJ , and wh,n fured ehanges tO

a rublldnee in fume me, fure rraofrarent and flexible;

whieh harh oeeafioncd it to be eall d Jy Ihe name of

IUI/a , .rnra.

If it be propofed tO deeompound thiJ

IUI/a

""I(U,

that is, to feparate the marine aeid fronl

the filvtr \Vith whieh it is uOl tCJ. the

I,na (afIJea

muH

be m<lted along '.Vil h fany and .bforbent nlatters, with

whieh the aeid \ViII unite, anJ bve the metal

ex~ecdiog

pureo

mull be obferved, th¡¡ if, inllead of the nmine a–

ciJ, fea·fdl t in fubflancc

added tO a fol mion of fi lm

in the Oitrllll$ ¡cid, a preeipitate is al¡¡¡ produeed, whieh

by fulion appears tO be. a true

luno

car

nt~.

The rearon

is, that the

fea-f~lt

is deeompofed hy rhe nitrous aeicl,

which reizes ils bafis, as having a gre¡¡ter ,fIinity there–

with than its own aeid hath; and lhis aeitl bring Clln–

rcquentl)' difcngageJ. and fet at librny unitrs wi;h the

filt'er , whieh, as

h.ls

been AHwn, has greater afli niry

wlth it th.,n with the nitroul aeid. T his is , n inlldnee

01'

dceompofiti on effd ltd

mcan~

of one of tho:e

douule . flin ities mentioned iD the fevemh propofition

eooeerninc aflinities.

From whal hath been airead)' faid il is clear, that alJ

thefe eombinations

01'

fi lm with aeids may be deCtlm–

poundcd by abrorbenr tarths and

Iry

fi xcd , Ikalis; it re–

ing a gencral law wilh regard to all mmllie Cubll.1l1ccs.

Silvcr, when fep.trJted by thefe me.lOS from the aei

in whleh it was diO¡,h'eel, requires nothioR but limpie fu–

fion tOrell ore it tOits ufual form; bccaufe it clocs oor,

any OIore than gold, lofe ils phlogilloo by thorefolutioos

and rretipit.ltions.

Silm uoites wirh fulphur in f"fion. If this'meral be

cnl, IllJde red·hot iD aerueible, and rulrhur be theoa,l·

tlcJ,