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mixture a fixteenth pan of its weighl of chareoal, made
of
b~ech,
or of any olher wood exeepl oak, becaufe lhat
alfo flies. MoillenIhewhole wilh as muc;, water as \\'ilJ
bring it lO a aiff p,llh, by working and kncading il uilh
yonr haods : Now inlroduce it iOlO your mon, taking
care oot tO daub its neck,
'rile
relon muJl be of the
bdf emh, aod of fuch a r,ze, that when your maner is
io it, a full third Ihercof fllalJ ailJ be empty.
" Place your relOrt, thus charged, in a reverberating
fUl'oace, fo proponiooed, that there may be ao ioterl'al
of twO inches all rouod betwecn the r,des of the furoace
'lOd the bowl of the reton, eveo where il
conrra'~s
10
fOl'm lhe neck, which fhould aaud ioclioed at an angle
of lixly degrces , Stop alllhe apenures of loe fu rnace,
except the doors of the r,re·plm aod afh·hole.
" Fit 00 tO the reton a Ja.rge glafs b,lIoo two lhil'd,
full of water, ano JUle tltemtogether, as io diailJing the
lmol;ing fpirit of nilre.
In
lhe hinder pan of lhis bal·
Ion, a litlle above the furface of the water, a fmall hole
~u!l
be bored. This hole is tObe aopped with a fmaU
reg of birch·wood, which mua
ni~
io and out ver)' ea·
f;ly, aod have
a
Imall koob to
pr~vent
its fall ing ioto lite
balloo. Tltis peg is to be pulleJ OUl from time 10 lime,
thal by apply;og tite haod 10 lite hoJe il may be koowo
whelher the air rue6ed by lhe Iteat of !he relon, i([ues
CUl Wilh 100 much or too linlc lorce.
" If lhe air ruales OUl ",illt 100 'much rapidily, and
\Villt a Itiluog noile, the door of titeafll·hoJe mull be en·
;irely fllUt, in order 10 flackeo Ihe fire. If il do oot
Ill'ike pretil' (manly againll lhe hand, lital door mua be
opeoed wider, aod large coals lhro\,1D inlo the 6re·place
to qui:keo lhe 6re immediately.
u
The opemioo ufually la0.s four ilod lllfeoly hours
j
and the following figns fllew lhal il will fucceed, provi.
¿eu lite reton refia the fire.
u
You mul' begio lite operalioowilh pUlling fome un·
li~hled
charcodl in lhe aal' hoJe, and aliule lighted charo
c~al
at lhe door lhereof, in order 10 warm lhe relon ve·
ry flowly. When the whole is kindled, PUfll it into lhe
a:h hole, and clofe Ihe Joor thereof Wilh a tile, This
I)loderate heat briogs over the phlegm of the mixture.
Tho Carne degree of heat mua be kepl up fou r hours,
úlerwltich fome coals may
be
laid on lite gwe of lhe fire·
place, which the 6re' undernealh \ViII kioole by dcgrees.
WithIhis fecond hm broughl nearer lhe relon, lhe bal·
Jon grows warm, ano is filld Wilh wltite ,'apours which
I:ale Ihe Cmell of feliu oil. Infou r hours aflcr, this vef·
fel will grow cool aod clear
j
aod lhen you mua opeo lhe
.door of lhe afh·hole one ioch, tltrow frefh coals inlo lhe
fire.place every three
mi~ules,
and every lime fhU,1 lite
(\oor of il, len the cold
alr
frúm Wllhout fhould aJlke a·
¡¡ainll lhe bOllom of the rcton and crack il,
" When lhe 6re has been kCpl up tO tltis degree
f~r
about tWO hours, lite inr,de of Ihe ballon begins to be
Iletled over wilh avolatilefah of afingular nature, which
cannOl be dril'cn up bUl by a vny violent fire, and
which fmells prwy Ilrong of peach·kernels.
Cm
mua
be
t~ken
Ihat this concrele f,ll do nOl nop lite lillle hole
in Ihe ballou: for in that cafe it would buril, the re·
tOr! being then red·hol, and the air exceedingly rarefied.
The waler iD lht balloo, bcing hemd by lhe vicinilY of
s
T
R
Y.
tite furnace, exhales vapours which di([olve this fprigged
falt,
~nd
the bailan clears up in half an hour afler jI has
ceafed rir,ng.
" In abom lhree hotlrs from lhe firll appearance of
this fall, lite blllon is agaio 611ed wilh oew vapours,
which fmcll like fa lammoniac thrown upon buroing coals.
Tltey condenfe on lite r,des of tite receiver iotoa fall which
is nol branched like lhe former, bUl appears in long pero
pendicular areaks, which the vapours of lhe water do nOl
di([olve. Tltefe while vapour! are the fore·runoers of
tite phofphorus
j
and alildebefore Ihey ceafe tO rifethey
lofe lheir fira fmell of fal ammoniac, and acquire l!te o·
dour of garlick.
" As Ihey afcend wilh grw rapidity, Ihe litde Itole
mua be frequendy opeoed, 10 obferve wltelher the hif·
fing be 001 too (lrong
j
for io lltal cafe jI would be oe,–
ce([ary 10 fh ut the door of the afh·hole quite clofe.
The(e wbile vapours continue llVO hours. When you
60d tltey ceaCe rifing, make a fmall pafl'age through Ihe
dome, by opening fome of jls regiam, that lhe flame
OIay
jull begio 10 draw, Keep up lhe fire io tltis mean
Ilale till Ihe fira volalile phofphorus begin to appm.
" This appears in aboul Ihr ee hom afler 'tite while
vapours firll begin to rife. In order 10 difcover il, pull
OUI lhe lillle birchen peg once every mioule, and rub il
againa fome hOI pan of lhe furoace, where il will leal'e
a trail of lighl, if there be any phofphorus upoo il.
" Sooo aher you obferve tltis flgn, ¡here will i([ue
OUI lhrough lite linle hole of Ihe balloo a arearn of blu·
iO, ligr.r, which coolinues of a grealer or !harter eXleot
to lhe end of Ihe opewion. This ¡¡ream or fpont of
lighl does nOI burn. If you
h~ld
your finger agaioll il
for lWet;,y or thirty (eccr.:!, lhe lighl will adhere 10 il
j
and if yGU rub lhal finger over your haod, lhe ligltl will
berOlear il, and reoder it luminous.
" Dut from lime 10 time lhis IIreamer dam out 10
the lenglh of fe'veo or eighl inches, [oappiog aod emil'
liog Cparks of 6re
j
and theo il buros all combuaibl: bo·
dies Ihal come io ilS way.
When you obferve lhis,
you mua manage lhe 6re vny warily, aod O'UI lhe door
of lhe afh·hole quile clofe, yel witltOUl eeafiog tO Ihrow
coals into the 6re·place every IWO minules.
" The volalile phofphorus continues lWO hours
j
after
which lhelilde (pout of lighl contraéis 10 the length
~f
a
lineor lWO : And now is Ihe time for pulhing your 6re 10
!he ulmon: Imllledialely fel the door of Ihe afh hole \Vide
open, .throw billel' of wood iOlO it, uoaop alllhe re·
giaers of lhe reverberalory, fupply the
fir~.place
with
I.rne coals every minute: lo fhon, for flx or feveo hour!
all Ihe inr,oe of Ihe furoace Olull be kepl of a while heal,
fu Iltal lhe relOrl fhall 001 be dillinguifhable.
" lo lhis 6erce extremity of heal the Irue phofphorus
diaills like an oil, Or like me!ted Wal(: One
pan
lhereof
floals on Ihe water iD the rccipient, the other faJls tO the
bOllom. Al bn the operadoo is known tO he quile o·
I'er when lite upper pan of the ballon, in whieh the I'n·
hlile phofpboru! appears conoenfed io a blackiOt 6101)
begins 10 grow rcd: For Ihis fhews Ihalllte phofpltorus
is burnl wltere the red fpOl appms You mua nuwflop
all tbe regiaers, aod fhUl alllhe doors of the furnace, in
order 10 fmother Ihe fire
j
aod
¡hto
clofe up the lilue hole
iD