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dull, and look like an eanh. When it comes to have

this appearance. raife yonr fire till the vefiel be red·hm,

and keep it up in this degree till the maller eeare entirely

to rmoke.

enlx of Anlimony reduud loa R(gultu.

Mlx the calx of antimony, which you imend to re–

duce, \Vith anequal quantity of black foap. T his mix–

ture will make a thin pane.

Pnt

it liule by liule into

crucible, previoufly made red-hot amidfl live coals.

Thus let the foap burn, till it ceafe to emit all oilyfmoke.

Then cover the crueible ; make the fi re flrong enough to

meh the mamr, and you \ViII hear it efferverce and bni/.

When this noife is orer, let the crucible cool, and then

break it : you \ViII find in it a ueautiful rcoria, marked

\Vith cireles of feveral colours; and under that a buuoo

of regulus, \Vhich is not yet quite pure, aod mun be pu–

rificd io Ihe follo\Ving manner.

Pound this regulus, and mix it \Vith half ilS weight

antimonial cah, as perfcél ly derulphurated as pof.

fi ble. Put it into a crucible, and cover it: meh the

whole, fo that the fu rface of the mehed maner may be

fmooth and uniform o Let the crucible cool, and theo

break it: you \ViII fi no in it a beauliTul bultonof very

pure regulus, covered \Vith a fcoria, having the appear–

ance of an opaque glafs, or a kind of greyifu enamel,

moul,led

the fioelyradiated furfa';e of the regulus.

;/nlil/lony calcind wilh Nilr(. Liv(r of Anlimony.

PULV ElI

and mix

pcrf~é\ly

together equal parlS of

nitre and antimony: pllt the mixtu re ioto ao iron mor–

tar, and cover it IVith a tile, which ho\Vel'er alUn not

fuut it quite c1ofe. With a live coal fet fire to the mat–

ter in lhe monar, and imm"diately withdraw il. The

mixture \ViII Aame, with great

d~tonation;

which being

overo and the mortar cooled, inren it, .nd nrike its

bouom to make all the matter fall out. Then, by a

blolV with a.hammer, feparate the fcoria ftom the fuining

pan, which is ihe

liwr

«ntimol'J.

Anolh(r e.leinali.n

Anlim.ny

wilh Nilre. Diophl–

n lic Anrilll'ny.

Mlx one part of amimony \Vith three pans of nitre;

projetl this mixture by fpoonfulls ioto a crucible kept

red hot io a furnace. Each projeélioo will be auended

IVith a detonation. Continue doing this till yon have

uf"d all your mixture: lhen raife the fire, alld keep it

up for tWO hours; after which throw your matter into a

pan fu ll of hot water. Let it lie lleeping io water kept

hot for a whole day. Then pou'r off the liquor: IVafu

the \Vhite powder you find at bOllom io warm water ;

and repeat the ablutions till the powder become infipid.

Dry it, and you bave

dtaph+rrlic onlimony.

ealx

Anril/lony vilrifd.

T ARE any quamity you pIcare of calx of antimony,

made without a<idition; put it ioto a good crucible.

which fet in amelring furnace: kindle the fire gradually,

aod leal'e the crucible uncovered at the beginning.

A quaner of ao hour after the mauer is red-hot, co,

ver the crucible, and excite the fue vigoroufly till the

cnlKmelt. You may know when it is thoroughly melted,

by Jipping into the crucible an iron wire, to the cod of

which a linle knob of glafs will adhere, if the matter be

in perfel! fufion. Kccp it in fufion fo r a quarter of aD

hour, or wher longer if your cruciblecan bear it. TheD

take it out of the furnace, and immediately pour out the

mehcd matter on a fmooth none, made very hot for the

purpure: il \ViII prefently fix into a yellow glaf9.

Kml/u

Min(ral.

BREAK any quantity you \ViII of Hungarian antimooy

into little bits: put it into a good eanhen eotree-pot :

pour

it twice its weight of raio-water, and

fourth

pan of its weight of IVell filtered liquor of nitre fixed by

charcoa!. Boil the whole bri/kly for twO hours, and

then filter the liquor. As it cools it will acquire a red

colour, grow turbid, and leave a red powder

the

fiher.

Returo your amimony iota the coffee-pot. Pour

it as much rain-water as before, and three founhsof the

formerquantity of the liquor of fixed oitre. Boil it

i–

gaio for two hours, and then fiher the liquor.

will

agaio depofite 'a red fediment. Return your aotimony

into tite coffee pot : pour on it the fame quamity of rain–

water, and half the fir(l quaotity of the liquor of fixed

oitre. Boil it agaiu for twO hours, aod filter the liquor

as formerly. Wafu all thefe fediment! withwarm water,

till they become infipid; then dry tbem, aod you have

the

Rumu minual.

R(gulu/ Df AnlimMJ difo!V(d in Ih( Minua! Acid/.

COMPOUND ao

oqua " gú

by mixing together four

meafures of fpirit of nitre, and ooe meafure of fpirit of

falt : on a fand-bath moderately heated place a matras,

into which pour fixteeo times as much of this

oqua r(git

as you have regulus to dilfolve. Break your regulus io

liule bits; aod throw them fucceflively one after another

ioto lhe mmas, obferving oot ro add a new one till that

put in before is emirely diifolved: continue this till your

regulus be all ufed. By degrees, as the dilfolutioDad–

vances, the ¡¡quor will acquire a beautiful golden co–

lour ; which however will infenfibly difappear, as Lbe

white fumes that contioua/ly afcend from it evaporate.

R(gu¡'1J of Anlb"ny cOl/loinrd wilh Ih, AcMofS(ajoll.

Bull(r

Anlimony. Cinaoar

AnlilllOl'J.

PULvER rSE and mix thoroughly fix partS of reglllus

of amimony, and fixteen partS of corrofive fublimate Put

this mixture intoaglafs reton that hath awide fuon neck,

and let one half of its body at lea(l beleft empty , Set it

in a reverberatory furnace, aod having fitted a reGipient

tbereto and luted the joint, makea very fina/I fire at fira

tO heat it flowly. Increafe it afterwards by degrees, till

you fee a liquor afcend from lhe reton that grows thick

as it cools. Keep up the fire to this degree as long

you fee any of this malter come overo

When no mOre arifes with tltis degree of fire, unlute

your velfds, take otr .he receiver, and io its place fub–

lIitute another filled with water. Then increafe your

fire by degrees till the reton be red-hoto SOllle run-

niog