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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 806933011:0522
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M F
the Focal Lenech ot rhe Cilaso beine made Ra,) MERIDHAN Maenerical, is a Crede Cirele
dius.
pattins chrough or byche Magnerical Poles; o
Dux most Accurate and Judicious AArOnOWwtich Meridians che Compats (iF nOE Octer
mer, Mr. John Flamsced, has discovered, chac wise hindred) hach respect.
chere is a Parallex ot che Farcts Annual Orbit
at the Pole StaT, OF abOuE 40 Or 45 Seconds;
MERIDIONAE Distance, in Navigation, is
The Pame with the Departure, Fasting ox WVest
Wrhereby the Diameter OF thic ScarS Parallel is ins. Or the Disserence of Longitude betveen
grearer in func chan in December, by abour one (che Meridian under which che Ship no is, and
Mtinure crvo Seconds: Which he has erinced ans ocher Meridian ine as betore under.
From7 Tears successive Obserrations; Wherebz
etie Farchs Arinual Morion is indubitably de
MERTDTONAL Parrs, Miles, OF Minutes, in
Harigation, are the Parrs by wwhich the Meri
monstraced, as appears trom his Learned Letrer dians in MII. WrisheS Charr (commonlr, tho
EODE. WVallis on thac Subjeet
Falsr, Called MercatorS) do encrease a5 the Pa
Non il on the Fdge of this Index chere be rallels ot Laciiude decrease: And the Co. sine
deaon a Scale oF Degrees, Minutes, and Sc, oF the Laritude oF any Place beins equal to the
conds, 10 rhe Radius oF the ClaIS, ve Mall nor Radius or Semi- diameter oF chat Parailel, there-
onlr hare a verr Accurare Instrument For the fore in the True Sea CharE, or Naurical Plani
FTOuE, buc be furnisti d wich one wherebe re sphere, this Radius beins the Radius oF the F-
Mall sec ihe Fruch of che Farchis Morion con quinoctial, or Wvhole sine of 90; the Meridi-
Armed by ehe ACcels and RecelS OF OUF STAF tO- onal Parrs ac cach Desree OF Laritude must en
vards and trom the Pole, according to the creale, as the Sccans of the Ark contained be-
Farrtis Place in the Feliprick, a5 char Learned  cveen char Laritude and the Lquinoctial do de-
Perlon aborementiond has discorerd; and crease. The Tables theretore ot Meridionat
FhaE nOF ouly erhen the Scar trantus the Meri- Pares, Which rou have in Books of Nlavisation,
dian bux in clear Rir at any rime oF the Day: are made by a Continual Addirion oF Sccams:
One sall sikevise obserre thac Annual Increase Ther are calculated in some BOOkS (as in
ot che Pole- Stars Declination, caused Dy the (Sir Zonas MooreS Pables) For everr Degrée and
Procestion of the P quinox.
Minure oE Lacicude; and chese Wwill serre cither
Moreorer, he, trom his oun Obserration, a(- sto malce or Graduate a Mercator S Chart, Or TC
sures us, chat the Pole- Scar may be seen in the orkethe Mercators Sailins. Toule chem, vou
Daytimme with a Felescope ot 16 FOOL; OF must enter che Table ith che Degrée ot Lari-
wvtich he sires particular Instances: AS, On cude ac the Flead, arid vich che Minure on Me
the 26Th oF April, F7Or, With such a Telescope
he law the Pole- Scar From 4 a Clock in the
Nornins Till 7; and cousd hare scen ic longer,
had nor Clonds incerposd. AIIO, On che rH ot
Arst Column coards che L etr FPand; and in che
Ansle ot Meerins ou will hare he Meridionat
s
Parts.
Favins the Lacitudes of trvo Places, id tine
May, he did nor l0ok For the Scar rill che Sun the Meridional Miles or Minutes Berween them,
nad been up more than halF an HIour, viz. at consider whecher che Places be one under che
in che Mornins, ver Coon toundic; and Car Eguinoctial and che ocher wide chereot; or che
ix atrexmards at Pleature, rill hale an Plour atter one on the one side of che Eguinoctial, and che
che Came Morning. S0 thac ris nor ro be ocher on the ocher; or whecher ther boch lic on
doubred bue chis Seax may be seen in a Clcar) che lame side: For, accordins rorhese Policions.
Day throuxhout the YCar.
The Declination oF the Pole Star Forthe Lear
theresa Threctold Case.
P. Whenone Place liethunder the F quinoctial
1750, i5 87 425p By Riccioluss his Catalosue chen the Meridional Minutes That are found nexL
OF Fixed Scars, in the appendix ro Vr. Fdvara under the Deoree ot L acicude the other Place
Sherbourns Sphere ot Manilius, ec. Hlence irs lieth in, is the Meridional Difference ot Lari-
Distance From the Pole ac chac rime mishr be a(- tude, or Lacicude enlarsed
Tumed 2 17 the Focal Lenorh of the Object-
Slats beins =5 Foor 6 Inches; (0 thac the Dia-
meter Mouid bc 14 Inches and == Parrs oF an
Tnch, Wvtich is the natural FangenE OF thC FOF-
met ACk 20 17 donbled; a Circ le larse enough
2. When one Place hach Norch Larimde, and
the ocher South, add che Meridional Minures
belongins ro cach Lacitude together, and the
Sum is the Meridional Minutes Berween them.
3. Wrhen boch Places are torvards one P’ole.
eo be dirided into Minures and Ilalres, which  chen subsract che Meridional Parrs ansverins to
ill be so magnitied by che Fre-glals, thar twill che lesser Lacitude, our of chole For che grearer,
be calie ro distinsuisi rhe Pime 10 a tew Sc-
Conds.
Tiscrue, there is Some Difficuley in fixins ux
ehis Instrumene; and when ic is (o, 1o kecp il
Erom rarrins From ies due Position; bur ver ris
nor insuperable. And FOr (inalI Instruments, Ot
about 2 Or 3 Foor lons, chere cannor be a more
and che Remainder will be the Meridional Mi-
riures required.
Fxamples ot these Cases ill make them more
Plain, Which Mall be chesc:
Example 1.
accurare, facile, and expedirious Nay than this To find the Meridional Parrs or Minures between
For drawine a Meridian Line.
Non Wohether che mans Benesirs chac may
acernC tO AAronomY, do nor matce the larger
the Equinoctial and Laritude 43 EL.
In che Column under 43, and righe asainl
one worchr ot rhe Charse and Frouble chac EI Minures in the Letr Fland Column stat de
t teeee quie ti tet  ea ser e mleue re tr
sideration de phe Lenered.
N
Se