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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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MEC
F
MEATOS Auditorius, the Audirory Passage
Deum ol The Lar: Les ule is 10 recereche dound
and to conres ic casily, buc yet rruls and (o etfe
ctually eo che Tympanum; vichin ehis Carirs i
che Far - WAX, OE Cerumen.
MEA LIS Vrinarius. Sec Vrethra.
MIECTTAMTCKS, DE. Wallis detines 1O bC
the Ceometer oF Morion: and is a Mathematical
Science which ews the Ffects oF Povers,, Ot
morins Forces, (0 far as ther are applied eo Fn-
sines: and demonstrates the L awsoF Morion, (5C.
Tis also commonty caken For chole Handy-crafts.
ertich require as well the Labour of the Llands
25 the Scudy OF the BFaL.
The Principle on which all Mechanick Pove
depends, ill be casily understood by theRelo
lurion oE ehis Problem.
ap and donn, cheir torce willbe expounded b
che lerpendiculars Sa and bH; wrhich beins 25
theRighe Sines ot thetormer Arks b B and a A
will be toone anocher also as the Radii A c and
CB: Wheretore che Velocities of the Povers are
Weighe, or gravicarine Force and its Velociry
conjunetir; it ditterent l’overs or Weighis are
applied to the Lerer, cheir Momens will alvaye
bc, 25 che. WeigHES (OF POrVerS) and Their Distan-
ces tromthe Center conjunctIr.
WVherctore il ro the lame Lever there be rwo
Porers or Weistus applicd reciprocally prOPOr-
tional co their Distances From the Centre, their
Momenes will bc equal; and it ther aet COntra
rilr, as in the Cale oF the Statera ox Stilliard, thC
Lerer Will remain in an Forizoncal Polition, Ox
the Ballance wisi hans in squilibrio.
And chus ris casie ro conceire houthe Weighe
ot one Pound may bc made to Lqui-ballance a
thouland, E9c.
And from hence ris plain, That the FOrCC OF
ihe Porveris norat all encrealed by Fngines, bur
ontrthe Velocier of the Weighe in cicher Littins
Or Dramins, is lo diministred by the application
OFche Instrumene, charche Moment of che Weighe
may not be srearer than the Force of thc
POrVeF.
Thus for Instance: IF any force can elerate
a Pound eishr ich a siren Velocies; tis im-
possible, by any Enginc, to etsect that the lame
Porver MalI raise evo Pound weighe ich che
Pame Velocier: Bur vou mas by an tingine raise
trro Pound reishe ith half che Velocier; or
1000orimes the weighe wich onc 1000och part
ot the former Velocies
The Admirable NIP. IaAC NeNTON ACCONHES EOK
all che Mechanick Polvers by chis Followins Dia
Sram.
Degins From the Choucha and inds rovards che
invard pare of the Far, and is cloathed wich a
ehin Stin a5 Far a5 the brim of che Timpanum, 0.
Nou is any Porers are applied cO che Lnds OF
the Lerer A and B, in order tO raise IES AEnS
also as ihe Distanes stom e Centre.
Ans Body as A mith its Celerity C, beins si
ven; and also another Dody as B: Tis requi–
red to find the Velocity necessary, io make the
Moment, or Ouantity of Motion in B, t0bc
equat lo che Moment os A, ihe siven B0dy.
Nou lince che moment of any ous is equ
Main oe more che weight.
ehé Rectanele under the Celerity and the Ouantity of
Maiter; 25 VOl W ie i CC Lans of Motion,
(sec the WVord Morion.) Lou hced ontr makie a5
BeO A:: CO is C eo a Fourth Term, which will
bec, the Celecus popet 1 B, (0 chac iis MO.
enE MaII BC eGuaL EO THaFOF A.
And since ThC NOmenE OF any Body is a5 its
And Fro hence ic Tollons, LMal als bbus
tho never (0 MaII, may have a Noment equal tO
chatof any ocher Body, tho nerer (0 great, Whici
Mall be morel rrich aur siten Celeritr.
NVHCFCEOTE IM AH) MaCBIM AL L.MZMMC, IF tC
Velociey ot the fover, DC Malle to the Velociry
OF the Weisht:: reciprocally a5 che Weisht.
10the Pover; chen Mall che Porver alvazs su
Cor. 2. e Princip. P. 14
Let AB BC 2 rectis, Or Lever, Wvhol
i5 ac c, and let it be moved into the Polt
PCay, charche Velociey oF any Pointin che Le.
ver is 2s irs distance From thC CCnFrC. L et thC
Point A describe che ANK A a; and che PoinE B,
the AFB BB: Then chese ArKS Wvill DC the Spa-
ces delelibed by theruo Mocions: Bur lince the
Morions ale boch made in che Pame LHIIC, LIC
Spaces will be as the Velociries. (Sec MIr. KeitS
Lans oE Morion, under the Word Morion, Theo-
dem 8.) Buc ris plain, che Artes A a, and Bb.
Wwillbe roone another as their Radii AC, anc
AB, because the Sectors AC a, and Bcb, are
Sular: Wrheretore che Velocicies ot che Poinrs
Q anet B are 25 cheir Distances trom che Cenrre
L. D.
FromO the Centre of ary Whect, let chere
be dearon che nnequal Raali it D and D W, bi
etcb.