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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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Wrherein the Degrees upon rhe Meridian incteale
cormards che Poles in che Tame Proporrion ThaE) L. Fo find the Meridional Miles, ansverins 10
the Parallel Circles decreale tormards them.
Tis casscu Menator Chart, OE Projection, DC.
Cause Mercator Was the First rhac publisted Charts
(o made: Tho Our COnnEEmaN MIE. WVrich
Was really che srst thac made rhe Pables for chis
Projection.
o ihe Plain Chart be reey casie and ulesul
in MOrE Vorages, and will serre in the lonsest
Vorages, it vou Cail FTome in Or near ihc op.
Posice Rhumb vou ene by; a5 the Ancients,
any Difference of Latitude.
First, By ehc Fable of Meridionat Parts, rohick
are princed in most Books ol Narigation,
Find che Degrees oF cither Latitude overhead
and theMinures in the Letr Fland Column dovon.
rards; and in che Angle ot imncerins are the
Parrs For char Laricude.
Thus al(0 find out thic Parrs For the ocher:
Then, it borh Lacitudes be oF rhe same Name-
irto beins Coasters, did, betore cheV(C oF the (chac is, boch Norch, or boch Souch, Suberact
Compass: Zec Foralmuch as ser Places, Ox in- thele one trom the orher; and chat Remainder
decd none but such 25 lic under the Came Mc- contains che Meridional Miles ToughE.
ridian, ox under the Eiguinoctial, can therein be
expresse aCCon tO tneir erue Sirvarion and
Distance one from anocher; bur il ther be laic
donn ede by the Courle and Distance, the Dif-
Example.
Required ro snd the Meridional Miles be-
ference ot Longitude will be False; iF ther be cveen Latitude 43 151 Norh, and 50 201 N
laid dorn br the Courle and Disserence oF L On
sicude, thent Ws che Diltance and Difference bc
more chan ic hould be; and il ther be laid
dovn by Melr Ltance and Difterence oF Lon-
sicude, (Wleu in mans Cales is imposible
chen che Msterence ot Lacicude vill alivars be
100 litic, asa ine Rhumo 100 ide trom the
Meridian; and il ther De laid donn by cheit
Latitudes assd Separation, then the Course wwill
be ice, alid the Distance t00 much, (90.
And since thac the Places in parricular Maps
Ox Charts beins sata donn in Pome, one war,
and in ochers anoret, and these Pieces mans
rimes tackd together, without due Considera-
tion of the differins Methods Places hare bcen
laid doron by. LHIS, L las, beins (0, the Gco-
sraphy and FTydrocraphy OE che World iS (O COr
rupred, thac cod mans Deleriprions of theWhole
Or Ot ihe larse Parrs ot u are enormonssy ex
roneous, and ise Strape Ot the Land much di-
Aorred. Ie ere to be withed cheretore rhac the
Laritude 50020 - 35057
Lacirude 43 15 - 288375 Met. PF.
Merid. DiserenCC OF L. aL. -- 6220
Example 2.
Lecone Lac. be 200 195,-12423 5el. n
The orher L at. 18 53 L. - - - TX545 fL1CL. LL
Merid. DiRerenCE OF L AF. - --23973 Sum.
PROBL E M H.
2. To find che Meridional Disference of Laritudo
by the Fable of Artisicial Fanzents.
The Losarichmick Pansents abore 43 Degrees,
accountins everr 30 Minures ro be one Deoree
and every Minute ro be rro Minures ol the MC
ridian Line, are in che lame Rario wich the Me-
ridional Parts, made by the continual Addirion
OF Nacural Secants.
Theretore, Fate hals oF each oE ihe Civem
Lacieudes, and ro each half add 45e, Lookine
the Tansenes oF their Arches in the Table ot
Losarithmick Tangents; the Diterence oF these
Fangemrs diride bY 1263, the Ouoriene rill
Example 1.
Lat. 50 201, ies : = 25 101; wohickZ
Tangentis.
2La. 43 24, i5 2Y0371 2; roticte
Fansene is, omirrins ehe Index,
ER OBLEMS
MERCATORS Chart, OE Projection, IS a
Projection OF che Face OF he Farth in Plano;
NVorid ould noc pur overmuch Value on, but
vean ic lest lout cue Ole ot che Plan CBart;
and by makins the Prue Chart Calte allet Latar.
brins il in Respect and VSc.
le ras the srear Scudy of our Predecesors
to concrire such a Chari in Plano, with Araie
Lines, oM wrtich aH Or any Parrs oF the WVorid
miphe De trnelr set dovon, according to their
Lonsicudes, Lariudes, Bearings, and Distances. be che Meridional Miles Or Minutes.
A Nar vas hinced For this near 2000 Tears
since by Prolomy, and a General Max accordins
chereto Made in the precedins Ase by onc
Mercator; but the Thins demonstrated, and 2
MIP. Vrichi taughe ro enlarse the Meridian Line
by the continual Addirion ot Sccants; l0 chat
aIl ehe Decrees oE Lacitude mighe De propOr-
cional co thole or Latirude, as on che Clobe: addedco 45, makes 66 371 =, whole 5 364294
Wrtrich he has donc after such an FxcellenE man-
ner, thac in mans Respects its tar more conve-
nient For the Navicators Dse chan the Olobe il
selF; and ill cruly Men che Course and Di-
llance trom Placero Place, whieh may soerer
Readr Way Menv d ot delcribins ic, was nor rili added 1045, mâtes 70 10, Whosc (442878
dhix tatt totetis be xecue.
+263) 785646 (622= Aeaa L
dc
Nar