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# Title: Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences (shelfmarks Leibn. Marg. 71; ZEN Leibn. Marg. 71)
# Folio - , page id 806933011:0049
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may be exllabtted as che nacure ot che Experi- (alvays under Water. There is a Pertorarion l8.
ment requires
When chis Fingine is lec on work, etiele Phano-
mena are observed, (Y.) Thar che Sucker beine
vound up, and uxon soppins che Valve, anc
(Sec Plare IL.) Wrtich passes perpendicularly rhro
ic, and rogerher wich etie Scick R. S. Terres For a
Valre, and is ro be Ropr ac the bOrOm OE ThC
Cxlinder NO. When ic is FuII OF Wacer, ivhere.
curnins che Key, draun donn again; ehie Rir in fore the Stick RS must be ot a considerable
boch Velters rili be broughe ro an equat atu
oF Dilacarion; and uxon recurnine the Key, anc
openins che Valre, near a Cylinder FuIl oF Air
will be expelled; bur che Receirer by reirerate
exluctions, beins more and more exhausted, lel
proporriotacs is forced our; lo thar ac scdl
betore vou necd to open rhe Valre, che Sucker
mas be tored ux almost ro rhe rop ot che Cy
linder; and is, When it is lo exhausted, vou ler
Boche Pump. che Valve beins Aopped, the Suck
er mcerly by che procrusion ot che Excernal Air
Lengct, 25 OF 2 OF 3 FDOr.
3. The chiet chins in ehis refortmed Lingine is.
thac che Pipe AB (Ptare II.) Whole end B TUEnS
upards, is made ro lie in aGrore or Ciurrer hol-
lowed purpolely for ic in ihe BOard CDF F
on Wrtrich ihe Receirers are to relt. This BOard
vas corered vich good Cement, and then on it
vas applied a Arons Plare oF iron of chebigness
oF the Board, haring only a Isole in che midole
For che Mouch of ihe Pipe B c0 pasS chrO; ane
this Plare he added, because he found char che
orerporverins chac more rarity d Air wichin, will eishe of che Armosphere wonld Cometimes torce
Deforced ux to the rop otthe Cylinder; where.
by is oblerred, Thac 25 che Sucket B5 tC
higher by the External Air, Meus che Receirer
cobemore or lels exhausted; che dir in the Cy
linder beins accordingly more ox lels able, t0 resis
the Fxternal, 25 ic varies in quancity. Tis alse
obsexred, Thac Whils ehe Receiver retains an
considerable quanrier ot Air, rhere is a briske noile
che Air ro peneerare Through a chick Board tho icc
Pores ere also dehonedly Alled wich Oyl. The
Fdses of chis Plare sould be a licele curned up-
rard, co hold a licele Warer which no and chen
will De apt to per into che Receiver.
The Scop. cock, CH FR, iho ir may bescder.
ed into rhe Cylinder de S, ver had Berrer p0 in
wich a Screw; For chen ic inay be more castu
immediacely produced upon che curnins ot che mended ir ic Mould nor prove righe or Btanch, and
Rey.
2. AICo, thac wrhen che Receirer is vell ex
hautted, the BraIS K ey (Thar is a Scopple to thC
Brals Cover) cannor be litced ux withour lome
disticurer, for ic feels as it lome preat weighi
avere fattened ro che borrom ot ic: The cause ol
ehis Faenomenon leems to be, Thac rhe Rir in che
also will nor be (0 apt t0 break oH. Tis conve.
nient also eo hare a lirele Covet OF Lin, (8C. 10
pur over che Nose ot che Pipe B, ro hinder chines
trom Fallins into ic, or injurins il, and ro keep
ehe Cemene our ot ic, Wrhen very (mall Receirers
are uled.
There is chis considerable Adranrage in chis
Receirer being very much dilared, its Sprins must Aac Board on wrhich the Recciver is placed; chat
De proporrionally weaten d, and consequenely che
lover end ot che Scopple is accordinsy prels d
the Receiver necds no Scop. cock oF ies OWn.
but is ulually one entire piece DE Clals in ché
up, Whereas che Sprins oF che Exrernal Air is nor form of a Bell, or Cucurbire, (30. Which wili
at alt veakened; (0 thar a Atrengrh e0 life up
che Scopple must suppore a pressure equal to ctic
disproportion becwixe che force of the incerna
expanced Air, and chac ol cho drmosphere incum-
much Fecrer keep out eHe Aie chan it it vere
pertorared, cho the Stop cock sould be never (0
800d.
Care must be caken tO Bet a go0d C’emene r0
bene upon che uxper parr of che Scopple: bur it fasten the Receirers co ihie Plare: Thac whict
che Air De ler inco the Reccirer by deprees, ene
eveiphe chac is supposed ro leep the Sropple
donn, may be felt ro decrease mose and more
the Incernal Aic by ehis recruic approaching mor
eo an AEquilibrium wich che External, eill ae las
he Receirer beinu slld wich Air again, rheSTOP
ple may be cacily litced ur
MIE. Boste, atter lome Lears Experience, tonne
the Lonourable MII. Boyle uled was a vell.
vroushe mixture oF equal DAEES OF BCCS. WaX
and Turpentine; cho in chie Wincer he found
ie best ro ule a licrle more of the Turpentine
and in che Summer a scearer porcion ot Bces
WaX
THCDESCrIXEION DE ME. PapinSEngine FoE ex
it convenient ro alter a lierle che Form oF his Rrst taustins che Rir trom MIP. BorlS continuarion o
Air-Pump into ehat which che annexed Figur
exh.
he PhysicoMechanical Experiments, PaPE 2. F
conismus primus, Figure 1, 3.
AA, are rVO PumpS made OF BraIS
BB, are avo Pluses hollon wirhim and open
belou
CC, 2rE rvo Holes III CHE uxper parE OF etie
Pluges, wich Valves openins inwaralY, char
chey. may aftord patsase r0 che AIF LO eO OUF,
and Anet L. Non comins in
DDDO, arc Tron lbds servins to move che
Plages, and andexed co chem, by means ot
EHC GNOIONS LF
EL are rvo Aac Pron Srirrups ac eHC FOP OFTHC
reoco l, c lea ca belatde ul
Aand to ler a- Wvork etie fingine
666, 15 2 Cord Josicullo rherwosrireups, and
comvaliue ie eatey 1
reprelent: And che advancaseous ditterences be
Eli
civeen u ald che tormex Fns ale dd lt
(Vid. Plare I.
The Cylinder is contrived to De placee
wichin a Frame oF Nood which is Alled wictr
NVater, s0 rhac che Cxlinder is alvays Kepr quire
corered wich ic; by Which means the Suckex id
alvays kepe Turgid and Plump, and che Warer
al(o AIIS up all the lirrle Incerrals or Spaces Be-
eveen che Sucker and the Barrel, and by chaE
means che Rir is mueh more exactly excluded
chan in che former Fingine. Bur here prear care
ust be caken in turning che Scop- cock, or else che
Wacer will ger inco che Receiver and spolt E
Experimene.
Becarse in cis Enpine _e Suchet is 20 be