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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 806933011:0452
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ISCTTTAS MATDR, is a Branch oF the Crural-
Vein, Which goes co the Muscles and Fac oF che
Ces, and is dirided attervards inco sereral Bran-
ches, wrhich are distribured to the TOC5.
ISCFIAS MINOR, a Branch al(o oF the Cru
ral- Vein, beins Dul a te Me, anet ls Wsesss spene
on che Mulcles and Stin, which are about the uP.
Which iS equal ro the Polyson must De le
that wtich is equal ro the Circle: Lheretore che
Square or Polyson must be sels Man che Circle
T. D
per Toine ol Me Femer.
charsed.
a Building.
ferences.
sular Loion Waliberer.
ISCEIIOM, is che Flip, Or Huckle- BOnc.
ISCTIDMELICA, are Medicines whIeM Totce
Vrine, in che CdC OF a Suppresion OF ic.
ISCFIDRIA, 15 luch a Supprettion ot rinc in
ISOSCELLMLRTANOLE. See Trianele.
OP.
The Angles oppolice to che equat Sides et ae
scosceles.Triansle, are equas, ald a Line deaWr
20 ruo equal laris, 15. Perpendiculai 10 ic
trom che TOP (or Vertex) cuttins che Bale in-
the Bladder, char licele or noching ot ic can be dis-
ISLES, in Archirecture, are Sides OF Winss oF Bale.
ISOCHILONE, Vibrarions oF a Pendulum, are
Tuch as ale made in the same Space ot Time, a5 2II
ene Vibractons or Svinss of the lame PCHuuMI
arc, Wihether the Arks ic deseribes be longer or
Morrer; for wohen ic describes a Morrer ATK, IC
mores so much che Dolet, alid when a lons one,
proporrichabls Faster.
ISOMKKIA, in Algebra, is che same virt
Conversion of Equations. (SeC Equations, LV. l.) OF
oF clearirs any lquarion trom Fractions.
ISOPFRIME PRICAL-FIGDRES, in Geome
ery, are such ad lare esuat Lematers or Circum-
Ot all Psoperimetrical. Fieures, the Circle ische
the sreatest.
Let the Posceles-Triangle Be A P C, anc LET AB
Base a C be suppoledro be divicnoqua
Parrs in m.
Cay Pm is Perpendiculax EO A C, AHE LHC AN-
For il a Rixhr. Line could be disposed inco che Sle P C A, is equal corhe AnB L C
Form o ise Circumterence OL a CErele, Ic oula
CONFAHT HLOC spacC FMa aH MMCL LBGMIC, A R
Demonstration.
For ihe Frianele Z hach all ils sides equal 10
those oF X, and rheretore must hare all ies AMeles
also respectively equal 1o chose in X: And chen
the Ansle. Pm A == P m C, becae The
ristc; Theretore Pm is PerPendLLLIOE EO A C, anc
he AnsleP A m = PCm. 8. F.D
re bortr
M
T0 divide a Risht. Line into eno eqjuat P.
res
AS suppose ehe Circumference oF the Circte
abc du eo be disposed into the Form oF a Square,
Or any orher Regular Polyson: S0 chac all che Sides
hi, andi c, rogether mar be equaltoche
Ehcumterence ot che Circle ab c d; Ilay theCir-
ele is greacer than thac square.
For the Circle is equalro a Rectane led- Friangle
one ot whole Less isthe Radius fa, and che other
che Circumterence. And che Polyson is equal also
20 such a Friansle, onc ot wrhole Less is che lame
Cncumference a b c d, or rhe Sum of che Sides
; and che oher Les is che Line f.o, bur a5
  chan ihe Radius fa, 10 ihe Frianete
Lecthe Line siren be AC, OVeMHS I COI
and serrins one LOOE In C, IIMKC an ATR boch
abore ana, BCIOW LHC TMICL O CC LMC; CHCI
Kcepins chem ac che lame Oittance, lec one Hoot
in A, and crols che former Arts in O and B, 2
Ruter laid From O to B, MaH cur the MMIaee OI
passro any Distance mele chan halt che Line AC
aie a C, di cirue te mo uo caru care
Denibnis a atton.