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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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l
ivards oF rhe EqUaTOF.
 a    L  L0
B A R2
Therly Wind; and thac che Falline thereot, on the. (che possible degrees otleat or Cold oF che Air, ac
CD is che Sir-Thermometer, Graduared atrer cho
F F is a Plare applicd eo the side oF the Tber.
Mercury bexinnins ro rile, is a Ture hien hal H mometer C D, sraduared inco Spaces an lverins re
begins io abare, as hath been experienced in MH Inches, and Parrs oF an Inch oE Mercurr, in che
C, a Fland Aanding on the Plare, at the heiphe et
the Mercury Thereon, as ic was when che Instrumene
vas graduared; as suppose here at 295 Tnches.
C MI, a Wire on etrich che Plare F S AipS uY
and down, parallel ro the Care ol che Thermo-
meter CD.
K, any Point ac which ehie Spirie Rands ar chC
eime ot Obserrarion; suppole ac 38 on che
Spirit. Thermometer; Aide the Plare L. F eill chre
Iland G Aand ac 38 on che Sir-Thermometer, are
il che Liquor cherein Cand at 38 litcemise, then
is the Pressure of che Rir che Came as ac the rime
ot Graduation, viz. 29,5; buc if ic sand higher
25 ac 30 ac I, then is che Pretture oE the Ait
sreater, and ehie Dirisions on che Riding against
the Liguor, Mew che presene heiehr of che Mercu-
ry c0 be 29,7 Tnehes.
This may sustice as co che Manner oF uleins it.
CapF. TTalley had one oF chese Clalles wrich him
in his last Southern Voy2ge; and he laith, ic ne-
ver Pailed eo sire him carly nocice of a STorm,
and ot allche bad Wearher they hac.
The Ingenious MP. TTalley in Philos. Transact
N. 187, hach an Fixcellene Discourle upon che
Reasons ot rhe Rise and FaII ot che Mercury in
Fair and Foul Weacher, the Substance ot which
15 25 FollOWS.
1. Ile premiles the commonty observed Phaeno-
mena oFche Mercurial Baroscope; Which are
F. Thac in Calm Weather, Wwhen che Air is en-
clined co Rain che Mercurr is commonly lou
2. Thac ris generally hish in 8o0d, serene, set-
Eled, Fair Weacher.
3. Thac it sinkS lowest oC aIl on very BTCAE
Winds thouph chey are noc accompanied wich
Rain; wich Relarion r0 che Point of rhe Compals
che Wind blons uxon.
4. That caereris paribus, the prearest heixHE oE
the Mercury is found, wtien an F asteriy OF North
Casterty Wind blows.
5. That in Calm FrOHty W cacher che Mercury
generally is hixH.
6. Thac alter very Great Stormsof Wind, When
che Mercury hach been low, ic ulvallys riles aBain
very Fast.
J. THac more Norcherty Places have a BrCateF
Alcerarion oF ehie Rise and FaII oF the Mercury
than chemore Southerty
8. Thac wichin ehe Fropicks, and neax chem.
chere is licele or no variation oE che Mercury S
heiphe in alI Weathers.
AS to wtich evo lact Phaenomenas, MP. Parrick.
che Famous Baromerer. maker, cells me, That he
hach certain ACconneS, that the grearest Variacion
ot che Barolcope is in the Larirode OF 450. WV. OFS.
and char che RisC and FaII gradually decreales to.
wards che Equator and Poles, (0 as in cither oF
chole Regions lcarcely t0 vary ac 2II-
The Thcory chac Mr. Falley adrances 10 (olie
aIt wtrich Phaenomena, is this:
P. Ile suppoles che principal Cause of the rise
and fall oF the Mercury, is trom che rvariable
Windo, Which are found in che Temperare Zones
L. A tecone
contrary, signities Soucheris or Westeris Hinds, lealt in chese Climares.
erich Rain and Scormy Winds, or Both; Which
larrer ir is of much more consequence ro provide same manner, with che likre Degrees.
2sainst ac Sea chan at Land; and in a Scorm, chc
Laricudes, boch eo rhe Norchrards and Souch. Common BarOMCEETS.
The Form oF chis MMctuMss sepresented b
AB repretems che spirit Xhermometer Bradtua. (2ne sole Btear incorillaney hece in Fnoland is
 bt B, or he Lrcecins Eoimc; ihconeil an fte Molo tond.