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# Title: Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences (shelfmarks Leibn. Marg. 71; ZEN Leibn. Marg. 71)
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suce
hale a Found weighe. Hay, chough when chectie WeieH e 2 Cplinder oF Mercury, and conte-
means adhere ro ic; ver wrhen this mas eryed aE-
rer chie Re admistion of the Air ineo che Receiver
quenely ot Aix ro cheror ol rhe Armosphere ot any
siven Diamerer. For a5 1. theSquare ofche Din
meter ot thie Cylinder aborementioned, is io etie
Squareofthegiren Diemeter ot che Cylinder Coupt
che Marbles rhen, on cheir beins broughe co touch (which il ir ere riro Tuches in Diamerer will har
cach orher, would as Aronsty adhere as ac rhC
Firs. Fsistory of Firmness, P. 288.
The Heiehe OF che Armosphere is variouaY con-
ies Square 4):: (0 is che Weishe oF che Cylinder
aborementioned, co the Weighe or lac ouSHL
WVork as in ihe Rule ot Phrec, and von have joux
jectured: Kepler makes ic abour eishe Miles; buE,
ocher eminene and lacer Astronomers, especially
che Learned and Diligene Ricciolus makes ic pro
Desire.
In MI. Boples Deseription ot tis Sratieal Baro-
scope he rells us, Tharhe found a Pillar oF Rir in-
Vable, char che Armosphere may be ae least sitey cumbene on 2 square Inch, 20 weish 181b. 8 Froy
Miles high.
From Which Acconne I calculared the Weighe ot
MI. Bople maties ihe common Heighe OE che A- che whole Air, all ronnd he Globe, 10 bC
mosphere when che Mercury in the Baroscope iS aF
30 Inches r0 be 35000 Fooc, or seven Miles; buc
ehis Accounes en a supposicion, chac all our
Air is of che lame densies and veiehe trom che
Surtace oF rhe Barch co the cop ol the Atmosphere:
Wwhich can by no means be suppoled, and cheretore
herixhely concludes ic must be much more, Nay,
8. 990405732203000000 Pounds Froy, wtrich a-
srees nearty wich che Weishe ot it calculared by
MIP. Paschal (thoueh he procceded a very differene
ay) tor he makes itto b0 8. 283889110000000000.
MP. Halley by undoubred Fxperiments, Foune.
thac the veiphie oF Mercury 10 Water, i5 45 313
in his Book against Linas he lusgelts, thac ris pro- co s, or very near ic; and chac che Specitick Cra
bable ic may be some Fundreds and even Thousands viey OE Air eo Water, i5 25 F r0 800, (0 chac ihC
et Miles high in cale che Atmosphere De noc a weishe oE Mercury 10 Air 15 25 1080OtOE; and a
bounded Porrion ot che Air, bur reach as hixh Cylinder OE Air OF 10800 Inohes Or 900 Feet, is
26
iF
equal to an Inch oF Mercurr; (0 char vere che sir
The Came Fonourable Philosopher BOr a hollon oF an equal Densirr lite Water, rhe volole Amo-
Cylinder oF Brals co be exactly curned by 2 500d sphere vould be no more rhan S= Miles hish
Arrist, Whose Lensch was 3 Inches, and che Bia. and in che Alcent ot every 900 Feet che Baroineter
merer ot iis Bore just an Inch: This had a Bor- vould Cink an Inch. Bur che Expantion ot che Air
nom nicely ficced co it; and chen beins Alled wirh encrealins in che lame Proporrion as ene cumbene
Ouicksilrer (the Weighe oFche Cylinder beins be Weishr ot the Armosphere aecreales, CaL l, as MM
Fore known) ic held as much as weiphed 170Z. Mercury in the Buroneter Cinks, the upPer ParES
n Drachm, 45 er. Froy. This beins mulcipiseu s ot che sir are muchmore raritied chan the lorver.
r0, (becaule rhe Barolcope then hewed che Mer and each Space aulerins r0 an Inch ot duict
cury r0 be ac 30 er.) pare 141b. 20Z. and abore silver prons prealet all prearer; (0 chac the At.
3 drachms Froy, tor che Weishr ot a Column oE mosphere mult be extended ro a much prearer
Mercury oF an luch in Biamietet, alses senes in heighe.
L enerb. And (0 much contequen Was i Po decermine the beixht of the Mercury at any as
WVeisoF2 Column of Air oF an Tnch in Diame- signed beishi of the sir; or havins that siven, te
cer, and ot chewtiole Lleishe ot che atmospdere.
find the hecenst os us plabe lbere the Barometer
Hence, knomins che Proporrions oF Cylinders, stands.
(mhich sec under Cxlinder) eis easie ro calculare) Since the Expansion ot che sir is Reciprocally
Receirer vas cracnaleu, ee es Marble beins
tet donn co touch che ocher, ic ould by no