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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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This Remark, above all orterS, ContemS Che )Ship. Court in chie OId Baily. Eie Torricellian Ope
ypothesis oF che rariable Winds, beine che cause
oF these Variarions oF che Flciphe ot che Mercury
for in the places abore named, chere is alvays an
easie Cale oF Wind blowins nearty uxon che lame
POInE, viZ. F. N. F. ac Barbados, and F. S. F.. 2B
Sc. Ftelena, (0 chac chere beins no contrary C ur
renr ot che sir, eo exhaust or accumulare ic, rhe
Aemosphere continues much in the lame care.
bur ehis is bur for once in ervo or three Vears, anc
ic soon recovers ils Perrled Care oE abour 29
Tnches: And chere is no doubr bur che lame chine
is in the Fast CoaCt oE Africa, and in India, Wohere
ehie Monsoons or Winds arc Trade tor halt che
Vear one way, and halE che Pear anocher; on ly
rator; and ehiey are che Kesule oE his omn lons
Rules and Observarions on che Various Rilins and
Falline os che Mereury co foretenon ihe W ea
r. Ir hach been obserred, Thac ehie Mocion o
the Mercury doch nor exceed chree Inches in its
Scorms, the Mercurr has been oblerred very lon
Experience and Observarions.
ther by the Barometer.
ricins or fallins in che Barometer Ot che Common
Form.
2 That ies least Alcerations are 10 be indeet
in order rorhe righe Aindins che Weacher by ic.
3. The rilins ot che Mercury prelages, in se
nerat, fair Weather; andies falling tout, asRaim
Sno, hioh Winds, and Storms.
4. In very hor Weacher ctie fallins oF rhe Mer-
eris probable, chac chere may Comechins worth cury toretteus Thunder.
nocins happen, abour che rime ot che change Or
Mitrins oF che Winds; Wwhich miehe be obrained
il any Body had rhe Curiolicy ro keep che Baro
meter at oue Factories in India.
Snonden Hill in Norch Vales was meatured B
Mr. Casvell wicl. MT. AdamsS Instrumenes, and
Found ro be 1240 Nards high.
MIr. Etalley Found by chrec exact eryals the Mer
5. In Wincer che ritins presages FroI, and in
Frocty Weather, it rhC MerCUEY FaIIS ThreC OP FOUF
Divisions, there will cerrainly sollor a Thaw.
buc in a continued Frost, il che Mercury riles, it
will cerrainly Sno
6. Wrhen toul Weacher happens soon aftex itie
Fallins ot che Mercurr, expect bur licrle of ic
and judse che lame when the Weacher proves fair
cury in che Baroscope descended ac irs rop 3 Inches, sorrly alter ehe Mercury has rilen.
Tenchs, and Comechins more, and perhaps 
7. In tout Weacher, When che Mercury riles
Tnches may be near enough Trurh; il s0, chen much and hish, and l0 concinues for ruo or chree
diride +240 by 4, che Ouorient is 3r0 Pards; Days betore che foul Wearher is over; then expect
(0 char any Fall ot che Mercury one Inch, argues
an AIcenE OE just 310 Yards; and =S oF an Inch
Fall. i5 3r Tards in heiphe; bur accordins EO MIE.
2 continuance ot Fair Weacher co follow.
8. In fair Weather, Woten che Mercury Falls
much and lo, and thus conrinues FOr EvO OF ThreC
TalleyS ACconnE OF 3, 8 Inches, he makes 30 Pards,
Vays betore the Rain comes, then expect a grear
heiphe to ansiver ro one renth oF an Inch Fail3 Wve dealof Wec, and probably high Winds.
cheretore allo just 30 Vards (For Mr. Falles
rhouphe che FaII OF che Mercury more than 3, r
Inches;) it (0, then if Dr. 1700kS new Baroscope
9. The unserrled Morion oF the Mercury de-
noces uncerrain and changeable Weather.
10. Tou are nor (o Arictly eo mind etie ivords
Will bear Dirisions ot one centh oE an Inch inco thac are ensraven on che Plares, though for che
ren more sensible parrs (a5 P beliere ic wil1) each most pare ic will asree with them as ehc Nercu
oFthose ren pares vill ansiver ro chrec Tards, and rysrilins and falline; for it ic sands ae muct
(0 by. is help one may cake che Level ot Places
very Well, co convey Wacer, (96
When che Mercury is ac 30 Tnches in the Ba-
Rain, and rhen rises up to chanseable, ic prelages
fair Weater, althongh nor eo continue (o lone a5
ic vould have done il rhe Mercury vere hixher:
roscope (ntrence may be compured che midale and (0 on che concrary
Hleiphe) che Armosphere is 5 Miles and = hixh.
thac is, supposins che Air ro beoF chelame Den
iry all alons; chouxh in all probabiliey ic is nor
huE prous more rare in proportion co is heixti
whie will much increase he heishE Ot THC, AO
Sphere.)
ThC Ingenious ME. Derham Rector oE Vmin
Aer, in Philos. Trans. N. 236, sives an ACcounE OF
lome Experimenes he made ae cheTop and BOF.
comi of the Monument; irhere he Found, rhac ad
the heixhe oF 32 Feet che Mercury fell =s oE art
Ench, and at abour 164Fcer , 3 oF an Inch, (30.
ITe chere allo describes a Portable Baromerer
ivtrich he conceires miehe be of grear ule in suctr
Experimenrs.
In Philos. Frans. N. 237. he sires a COnerI.
vance co measure che heiehr ot the Mercury in
And L chink my selE obliged in fustice co telt
ehie Norid, That L have never Peen betrer We2-
cher. Classes oF all kinds made any irhere chan by
Mr. Parrick; Wrtio doch really delerre all possible
Encourasement for the many Fxperimenes tre hachi
made in order co improve the Barometer, and
which he is alvars very willins eo me eo aIl In-
genious and Curious Persons. Arid chough L can
noc be oF Dr. Leishs Opinion, Who in p. 16 anc
180 oF his Narural Fsistory of Laucactire, (9c. Pairh,
AIr. Patrickes Experimenes demonstrare, char che
Suspention ot the Hercury in che Tube is nor
caused by che eishr of che Incumbene Armo-
sphere, since on a very caretul Fxaminarion of all
Ar. Patricks Experimenes, I sind chem aIL ac
conntabie by the Doctrine ot che Gravirarion ob
Fluids; vet Y do really beliere rhe makins and
ehe Barometer, by a Circle on one of ehe Weacher contiderine rhole Experimenes, hach siven MC. Pa-
elaces, co ehe hundredeh part of an Inchexactly.
ericke many usetul Flines for che Improvemenr ot
In Philos. Trans. N0. 240, Mr. Stephen Cray, ehis Intrumene, and will concinue ro do (0 daily
sews also 2 Mectiod ot mealurins che heighe ot
Nercury in The Baromerer, by adaprins a double
FIis Pendent Barometer is very curious and nice
the Scale beins graduared for ic by an Air-PumP;
Microscope Furnisti d with a Mlicrometer co che Ba- ic tach no Ciltern ot Scasnane Mercury ac the
roscope, by means of which, che Mercurrs Varia-borrom ot che Tube, as in the common Porricel
tions may be observed ro che Thousandch parr oE lion Experimene, and the Mercury rises and Falls
an Inch.
abour r2 Tnches, irstead ot chrec, as in the ordi-
The followins Rules eo judse oF che Weather nary Baromerer: And in a Diagonal one (rehich
oy e Barormeter L hact Ecomr M. Jolm Pacrick in she vecy hanatomls sis aboui ihe Frame ot a larse
Lootirie