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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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Pake2 (mall Class Tube, and erectirs it per-
pendicular ro che Horizon, Cuspend in is lorver
Orifice a maIl drop ot Wacer, or lome luch clear
Fluid; and chen ac lome cime when che sun is
neat che Hlorizon, and Mines very brishc, lec it be
obserred under what Angle cum Opposito Solis, ttre
Colours of the Tris arc seen in thependulous diop:
For then ehe Rario of che Retraction may be had
by an easie Calcularion. And iis Inrestigation
Eorms a Cubick Equarion, havins onls one ROOt,
by votrich the Primary Tris beins siren, che Racio
max be found. Tho Equation is chis, T. = 3 I2
-Arre =- 0. In Which, Tis the Tangene of the
Ansle ot Incidence souchr, and sis che Pangent ol
hais che Distance oF ihe Tris ab Opposito Solis, 10
the Radiusr = F. Whence, accordins to Cardans
Rules, there arises this Theorem, viz.
From he Cube r, lec there be rakcen che Produet
oF 2r into cho Fixcels oF rhe Secant ot che lame AFkE
abore the Radius, rhe remainder or disterence Mall
beche lesser Cube: Bur the Summ oF them, ad-
dine perr Mhai Berhe grearer Cube. The Summ ot
the Sides oF borh Cubes added ro i, wilt bc equa
co the Tansene ot che Angle ot Incidence; andthe
hals oF char Summ, ihe Tangene oF cho retractee
Angle. Wrhence the Rario oF che Retraction
HNOWM.
OFthis he sires chefollowins example.
In a drop oF Oil or Turpenrine, the distance ol
the Primary lris ab Opposito Solis, as oblerred t
be 25 40
The Rario oFche Retraction vas required.
F = TAHSCNE 12 501 = 0, 2278063
s= SecanoF chelame == 1. 0256197
0. 01182217
s= r IntO 2rt == 0, 01167265
Disserence, Cube ofthe less 0, 00014952 Whol
N 0. 0530773
The Summ
Addins atrr
The Cube ot che preater
as = 0. 9773486
0. 2278063
lesser. = T The naturaI TanGenE OF the AN
_le ot Incidence 510 32) and is HaIF,
viz. 0. 6293161 is che naturaL TAHBCHEO
vard on, is more chan a Third, Dut less than = the
i5 I rO, 68C25. Wtich RatiO COmCS VerY near LO
thac wrhich by Experimene is Found io be in Glase
Only, indeed, a Diamond excecds che rest o
Pellucid Siones, in this Porver oF Retraction; FOr
Or sch oF her Rake before. Tho in this Proporrion,
there is ro cerrainer, Tome Nations, and some
irS Rario is nCartY 255 FO 2, Or more accuratelY, as
RARF of a Ship, i5 lo much ot hex Fust a5 OVer.
The common Proxortion for a Stips Rake for-
lenoch oF her Reet; and che Rake aft is about a Arhr
2586322 = Side oF the Cube ot
che Retracted Anele, viz, 32 1V.
aud mos diaphanous Solids.
100 F0 AT.
hanes ax borh ends oF her Keel. That part oF il
wwhich is betore, is called her Rake formard on; anc
chat pare wvhich is at che fecrins on of the Stern
Post, is called ter Rake aft-ward on: When a Strir
Carpeniers buildins ich lonser Rakees chan ochers
A Lone Rake formard on, is 2 Strip hare al(o 2 500c
fat Bom, sires her a 500d Way, and helpster co
hach buc a Cmail Rake formard on, buc is buile
rith her Scern 100 Rrair up, Me is called Blusse-
beaded.
kecp a 8o0d Wind; bur rhen chis makces her apE
co pirch under Water in a Hlead Sea, and besides is
a Ereat Screls and Charse 10 a Strip, because MC
over-hanes (0 a Flcad. Pheretore e MIu I
Fable
board a Strip) belongine ro ene Pore a MaIM
HTalliards; ic harh in ic 3 Strivers, into which che
TTalliards are pur, and ac its Flead che Tyes arc
recred into an Hlole made chere tor char Pur-
Pose.
0. 02343482
0. 91122525
0. 93472007 who
porrion is best, CoCL alt MIn8S.
RALL) ie Ruader. Sec Mader.
RAKFD Table, a term in Archirecture. Sec
RAH-Fead, i5 the naMC _ d sICaC BIOCK (a
LLAMIELCATION, is a Collection oE small
Braneles Mume ouc Hror oe lateone. Thus in
Anaroms, thelereral Branches  ie ta  eut
Aeri, by whrich che Arcerial Blood is conreraeo
a ile extream Parrs ot the Dous, dle called che
Lalcations oE the Arces, aset Wen Hes ate ex
ceedins (mall, ehez are called Capillary Arteries
vich lec.
RLANIMEK, is 2 Scat Wsu a somu piee a
rroodat onc end, in order toartre nne une Pou-
der to the Breech oFthe Creat Cum, as aMo tHC ShOL
astel else Wad, Whichkceps che Shoc trom rovlins
Out. Lc the orher end oE chele Kammers, are ulualis
roled in a certain piece of Sheepskin. Meu W cI
Bore ot the Piece, in order to clear her atter Me
tao ocen discharsed: Let cs l Caneu Spungins
the Piece.
RAMPANT: The Tet _I LACTIS SOL a
Lse, or any Beast ot Prer, in a Posture of Climb.
IIIE. Or Scandins upristu on his hinder Legs, and
rea dhis Forefcer. Lls Mmerene trom Sali
ent, Wrhich is a Pocture not (0 crect. Sec Sa-
RAMTPART, in Forrification, ISM MaIS b
Carch wrhich is railed abou ine Body ot anr Place
to cover ic trom Great Shoc, and consists ot leveral
Dastions and Currains; harins its Parapet, Plat-
Form, interior and exierior Falus, and Berme, a5 also
Loes a ene Nal asse Cen MCs La) I IS
Lincd. Lhe Soldiers continually Keep Guard herc,
tent.
and Picces of Arrillery are Planred For the Detence
Lastiy, 25 V: F2 -= 4. V: F -F 1 : : r. 5, Or (0.
Oithe llace.
The Fleiphe oF the Rampart mult nox exceed
three Fachom, as beins sufticient ro corer rheLou
ses from che Barreries of che Cannon: Ncither
oughe its Thicknels ro be abore ren or rvelves
untels more Farch be catren out ot elle Dirch, chan
can be otherwars bestoved.
The Ramparrs oF FIaIF-MoOnS are the betrer FOF
beins lon, thac che snall Fire oF the Detendanes
maz the better reach che Borrom oF the Duch
buc vet ic mustbe so high, 25 noc l de cemanccu
by che COverr- WaY.
RAMOS anterior, Sc. Vena Subcutanca, iS 2
Branch oF rhe Subcuraneous Vein, (Which takes irs
Name From irs Mallon runmins just undex the Stin)
and is it selE a Branch ot che Basilica; it goes un
der the Muscles ot the vlnaro che licle LHIC
ute u sore braser ot deceptaita
teaha