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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 806933011:0414
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N. B. This Experimene may most tcadily and
easily be tricd (25 L have otten done my selF) wich
Mercury. IF rou cake a Mender Ola(S Tube, OF
Pipe oFabour soF an lnch Bores or rather lels, arid
dippins che lover end into a Vessel ol Mercury,
rou chen Aop chie uxper end rich jour Finger: By
ertrich means zou imay kecp halt an Incli, more or
less, oF thac Ponderous Fluid suspended in che Pipe:
And then il Keepine vour Pinger thus, vou im-
merse the Tube into a lone Ola(s oF Wacer, eill che
lirele Column OF Mercury De more chan 13 Or 14
cimes its lensch under Wacer, rou Will tind on re-
movine jour Finger, chac chie Mercury viil be
Kepe suspended in che Tube, by che Pressure oF the
Wacer upvards; bur chac it vou raise che Fube
ux buc a vers licele abore che former Scation, the
Mercury will immediarely run out: Whereas, il
betore rou had remored zour Firigee trom che
Top, vou had sunk che Pipe (0 lor, 25 thac the
Mercury ivere 12 or 14 Triches, C9c. beloir the
Surface of the WVater; thac then the Mereurr
vould be violenty forced up, and make several
Ascents and Delcenis in che Tube, rill by degrees
ic had sained irs proper Starion in ic, accordins re
che Laws oF Specitick Grariry.
Indeed chis Experiment vill nor be oF a very lon8
conrinuance, because the WVacet ill by desiees
vet up beciveen theMercurr, and the sides ot che
Tubes but ic will last a fero Minutes, and longer
it che Tube be verr Pender, which is rime enough
20 Patistre ans orie of che crurh ot chis Paradox.
Fromhence may the adhesion of the cuo polisted
Marbles cogerter, when che upper is suspended,
and a great weiehe huns co che latter, Dc casilY ac.
counced For. For lince the Armosphere presses Or
Praritates vith ils Wvhole eighe ou the under Sur-
tace and Sides ot che lorver Marble, bur cannor do
(0 ac all on iis upper Surtace, wtrich is closely coni-
tiguous co che upper and suspended Marble, id
must necds kecp elie Stone buored ux or pendu-
lous, eill such eime as cirher che Air insinuare ic Lel
in beteen the Stones, or thac a eighe be affixed
eo the lorer Stonc, Which excecds che weigheof 2
Pillar oF Air, Wrhole Diamerer is thaE OF Che Nar-
ble, and ics heiphe reachins ro che TOp OF the AF
mosphere: And chacchis is che realon ot their co-
hesion, is plain; because when cher are chus su
spended, and do adhere ro cach orher, in thc RC
ceirer ot che Air Pump, on a very ser Pumping
OE the Air Out OF the Receirer, chey will immedi-
arelr disjorn and Fall asunder.
thar che Malhematical Reduet Mas alo DC Pled
Sed in tis war roo, he has che Follovins MOrE AC.
coune oe thparostacietis, dravn ux trom Dr. Walli
cind lome ocher Auctiors.
(Sectis. 1.) beciher not pressed ac all, or else pres.
sed equally in ereer pare, as will be che Cale, al.
lowins che Pressure ot che Rir, Which is an Flomo-
geneal Boar Wich respec EtarIE, and presses
equallu in all the Paris oF (0lmall a Surtace. Nou
since che Parts of che Fluid belor, are all acted
upon by Gravitation, cher cannor ascend and so e.
lerace any pare ot che Surtace AB; nor can iie
Fluid subside in one part, and so be eleraced in a-
nocher, beins che Presture against the Bortom is e.
anothers Subsidence, supposine the Fluid dirided
into any Number ot equal COIMMMIS. Eence I
Follons, Fromche contrarr Prerture of chele equal
Columns ac the Borrom oF the Vessel, rhac chere
can beno Morion; chac is, che Surtace will remain
eren without any manner of Disturbance. D. F. D.
Sec Dr. Walliss Mecha. Prop. 8. CaP. 2. de decensu
gravium.
Plaim, asit ias suppored in che foregoins Proposiri-
Face unequal, ir will again secores ies formet
Stace.
We Mall nor ac present consider, a5 chac che PartSOL
che Fluic mas hapren 10 berenactoto, .
Ferche Vesset AILB, BE fil d wich Water, or ani
other fluid, nhose Surface me suppose to be even:
(mhich, tho in reality it will not be a Plain, bui
part of ibe Surface os a Sphere, concentrieat rith
the Farrh; yer we pall al alone consider it asa
Plain, or as differins insensibly from one:) I say
if this Surface be supposed even et first, nil still
remainso.1
Irhich is chus demionstrared.
Tet rtie even Surtace A B oF ihe Vestet AKTB,
rery Wwhere equal, and consequeney hinders one
Tnus taF vene this Fxcellent Centleman: BuI
BlFit Ihe Fluid De puE OuE OF chis Scare by some
externatetee, lo chatone part oF itaS D (Fig. 1.
be elerarell abore the rest; do bue remore ctie
totce, and ic ill rerurn co is Former Hlorizontal
Position, Pas uxon che ACCOuHE OF ies Fluidirs
chac are belo itlett, and alto becausethe subjectea
Parr C beris moreprest chen che ortier Parrs oF che
Surtace A B, this Pressure wili be continued corhe
Botrom ot the Vesel, Wvhere by reason oF che re
Sittance made Bs the Borrom, it will be communi-
caredto choll Lats chatare less prest, Forcingthem
to ascend (0 LOne rill che Equilibrium be 2gain re-
Aored; i. c. Till H B become even and parallel 10
the FTorizon. So chac altho che Surtace benOT a
the Parrs abore HW adwn into MOIC PtaceS
on; vec il che force be remored, thac made its Sur-
Theremas be lome Accidental Variarions which