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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 806933011:0050
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2 I R
LL, arC Euo Valves ac che bortom oF ct
Cmps, openins invarals, for che admi
on oE che Aix our oE che Lube M M.
which being Muc again hinders The Pame AIF HNOHI
makrins a Regress; Wheretore ctue Piuss atier
Wards descendins, compresserh rhac Air, utience
ot necessier che Valre C must bc open d, and alL
che Air must pals our of it, becaule che Nacet i1
he borcom ot che Pumps dorH Cx
Spaces, and dorh also resursirare curouxh edie
alve C
AII aII cho
Fere ris observable, Thac chis double Engine
lo ipon manz occations t0 be preterrd betore a
sinsle one (chacs mord, with che FOOr,) FOr 1
doch noc only produce a double effect, buE per
rhac che Tube P DO may nor Met lcforms ic much more easily; tor in chele engines
Exerliser oF. che PumpS, bur chac he may which are furnistiei bur wich one Tube, wtill
the Plues is drann oue eo eracuare the Pump.
00, 15 d Plare bored in The midale, on which che whole Pillar of che Air, incumbene on ihe
thelleceivers ro becralltaceu, arero be pur; Plus8, is ro de elerared by force; and again,
When che Plues recurns back, ic is al(0 by torce
This. Fnee is eo be pur into a FraMC Ot Wood ro be restrained, lest ic Mould De r0oswisily im-
Pelld by. the Air, and so break che borrom of. the
Meved in ene recond Schelle. Andas much Wa- Fingine; bue in chele double Engines, thc PH) er Ol
cer is ro be pour d into ene Pumps chroushi che chem is in a manner wholly tree trom char roil
tlole D in cha Plare OB, d ls sufticienero fill che For che Plugos are calily litred un in the Arst
Cavicies oE che Pluoos, atid a Iule ore; and suction; because the Air, immediacely derived
chen lome BOdy miul Hand Os i cvo tron scir. srom che Receiver R inco che Pumps, pressertiche
rups FF, and must alternalets deprets assa ele. Pluees domnwards, almost as Aronsly as che FX
vace them: Lor by chismears hC LsLS, tollon- cernal Rir incumbene on che oppolite parES; and
ins chemocior ot rhe Scirrups,  issell altenr will when che quanciry ol che Iniernal dir is dimi-
leare chie Space in che borrom ot che Pump emper, nistr d, ir comes ro pals, thac che Plues ro be de-
and secins all ocher Passase is intercluded trom pressd, tends downvard wich (o much the ercar.
che Air, chac Air alone which is contained in che er force, and (o by means ot cheCord C66 com
Receirer R. is conrered inco the atorelaid Pumps pastins the Puller, dras che. ocher PIVCS up.
by ibe Lube 88 PF M, and oxens ihe Valve L,) vards, and ac che lame rime hinders it (rom r0C
uct
AM, is a Tube reachins trom boch Pumps 10
L; Which Curracure oughe to be (0 lons.
conrenieney Hand On ee ScirruPS FF.
chie Plate OO, by means oF FhCCUEVaTuTE PP
25 Ktor Fxample.
Eo suppOrE it Belore ir can be used, Tuch. a5 is