# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/806933011:0634
# Permalink to this reading: https://leibnizlegible.com/page/806933011:0634?run=74
# Title: Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences (shelfmarks Leibn. Marg. 71; ZEN Leibn. Marg. 71)
# Folio - , page id 806933011:0634
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=806933011&page=634
# Source image: https://digitale-sammlungen.gwlb.de/content/806933011/jpgs/default/00000634.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 112 lines, status machine
# Lines: 112 recognised, mean confidence 0.89
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
# Licence: CC BY 4.0, Leibniz Legible. Machine output: do not ingest it as verified text; keep this provenance with the text.
# Wording rule: say "the machine reads it as …", never "Leibniz wrote".
# After the first blank line: the recognised lines in reading order, one per line.

oprictes, is choc
erhich passeth chro the Place ot Reftection, and
is alwazs perpendicular co che Plane oF he blalS,
Or Refectins Body
PLANE os Refraction, is a Surtace dravn vilinear Lrajectorr.
chro the Ray and Axis of Incidence.
PLANE Sursaco, is chat which lies eren be-
eveen its boundins Lines; and as a Righe Linc
is che Morrest Excension From one Point to ano-
TheF, (0 a Plane Sursace is che Morrest Extension
From one Line eo another.
PLANE Verrical, IOpricks and Perspectire.
is a Plain Surtace wtich passech alone the Prin-
cipal Ray, and consequeny chro the Fye, and
is perpendicular rorhe Ceomerrical Plane.
PLANELS, are the Frratick OE Wandrinq
Scars, and Wwhich are not likethe Fixed ones al
ars in the lame Position eo one another. NVe
non number che Farth amorie che Primary Pla-
nets, becaule wre know ic mores round rhe Sun,
a5 Saturn, Fupiter, Mars, Venus, and Mercury
do, and char in a Pach or Circle berween Mars
and Venus. And che Moon is accounced amions
the Secondary Planets, Or Satellires oF che Prima
ry, Cince Me mores round che Farrh, 25 fupiter 5
Four Moons Or Sarellites do round him, and Sa-
cuns Fire round abour him; il Cassinis Fyes
mas becredired. Bur L couldnerer seemy selt, in whiar Sense ris robe understood. For since
Or meet vich any onc else who erer did see any
bur che Fusenian Satellire.
AII che PlanetS, 25 ldt as Wve can find, have,
besides cheir Morion round rhe Sun, which makes
cheir Tear; also a Mocion round chCIE OWN AXCS,
ot chemselres, in as propet a Manner, hare a
contrarr Propension, or vis cemnisusa, an ndea-
vour ot aroiding one an. Phetrue Mean-
Which makes cheir Dar; as the Barchsrevolrins ins cheretore or cus Altempt Ol Lndeavour 10 sel
(0, makes our Dar and Night.
Tis more than probable chac the Diameters ot
all the Planers are longer chan cheir AXeS: WC
Hnow Eis (0 in our Farth; and Mr. Flamstead
anid MIr. Cassini both found ic r0 be C0 in Fupiter.
And cheretore tras a grear Mistate in thelnse
nious DE. Burnet, r0 aNerr, a5 he dorh in his Fsy
pothesis, che Polar Diameter of the Farth 10 Cx
cecdrhe ocher.
HIr. Jaat Lnion alleres Out LateMS Equato.
rial Diameter ro excced the ocher by about
34 Mtiles: And indecd else the Mocion oF the
Farth vould makre the sea rise (0 high at chc
FguatOF, 25 t0 drovn all che Parrs chereabOuL.
Thar iII Bodies beins purels Lautre, and (0 in-
capable ot alcerins chen  otto al
those STaIGHE LineS OF PANGCHMS, IOCICIE CUNS
Body B recains ils Projectile Force alons 
ast
PLANE os Reslection, in
Straishr Line in erery Poine oF ils Cor
make che Line oF irs real Morion become a
Benc onc, antet CMaSC Ss Lcat  a Cu
Flence mar be learne whar is that Conatus re
cedenat a centro motus in Revolvins Bodies, and
aII Bocles have a vis centripeta, Or Propension
torvaras one another, eis impossible cher Moula
Farcher OH che Cenere ot Morion, is onl chis
in whick eses aleerees otene; do. stilt cend
onvards siene Lae Les ane SCCaM CHCH L1O.
pension ot lnort conatas Thac Lectilineat MO-
rior all che time cher are obliged tomore in
Curres; and consequentr at everr Point ot
cheir Cburle, endearour ro Ay OA by cheir Jan-
Sents. Noir cheParis of the Pangene, eo which
The Learned Mr. Whiston, in his NB
Pheory os the Farth, accounts (fron
the Admirable Ur. Nevrons Princi
ciples) for the Motion and Redobiilio
of the Planets, rhus.
E M M A X
From the unilorm Projectile Norion OE BO.
his Encaro o, Deu laltet ost e e
than thole ot che Curres ro which che Bodies
are actually FOrCCd, an ALeMPE EO 50 on in che
Tangent may be, and is stiled an ALTeMPE EO GO
Farrher oH, or recede trom CMat CenFre; ThO
Or OF persererins in a LLCCIMHCAF MOLON: 30
thactho che vis centripeta, Or Porver ot Gravica
tion, be an Actire and Posirire Force, continu-
ally rener d and imprels d on Bodies; vet che
vis centrisusa, Or conatus recedendi a centro motus,
is noc so, bur the meer Consequence and Retulc
Ot their Tnactirier.
This is evident in Bodies revolvino in Fllipses
about one ot the Foci, in their Delcent torrards
trom no ocher Afection than thac of Inactiritr
oE Atcraction or Crrarcacem ee t
Norion ot allthe Lleareny Bodies dos arile.
Former B trom ies Scraighe Line DC: And by
any Rerolvino Bodr be dilinsaed trom ine
doime lo conernuals; oadle al e ae cle   torce rolich recairea ie in 8 C vere, auc
NOL
ic; Where che Tangent beins oblique ro the
IF 2 BodY, 25 B, be moring unitormiY alone
the LIMC C, FrOm DEOC, and anorter Body
A BC PresenC: CHIS lacrer Body A must draw. chc
Radicto, Ot Ctrie srom che Poinc ot Contaet l0
the Ldcus, this verr conatus recedendi a centro
motus carrring ic alone che Tangent, will POr
Fome time makce ir approach nearer rO ThC FOCUS;
tho noc (0 much near a5 b) lo LCt I THC
Ellipsis ic sett.
For let a Sione be ler loole trom the Slins, Or
dies in Straighe Lines, and che univer (al, POrver