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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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ETRE, Ox Eyre, in Brition, Cap. 2. Ishities che simmorable, then che ela stick Foree will act equal
ly in cach Body, and produce equal murarions ot
are those which Bracton in mans Places calleth Mocion.
ise called; Which is, or Mould bY ancienE ter
be held every chree Xears, by che sultices ot ine
FOrCIL.
And Nom ehis Flastioity in Bodies, arises char
Resilition or leapins back trom one anocher, wrhich
ere obserre in mans Bodies on cheir movins lvite.
ly one against anocher. The ulual method cojudge
Wrheces boces are endomed wich chis elastict
Oualier or noc, is lo enquire, Whecher on beino
Aruck, cher sire any tinnitus or ringins Sound, or
Spring when bene, and endearourins ro unbend ic  indeed any sensible Noile; For itcher do, voumay
TelF 2gain.
In Physick, ris caken For rue Cccarour ot Sprin-
Bins or Elastick Parricles, When comprels d or
crowded into a lictle room, ro dilare and erolre
chemselres again: Wheretore, by chis Name chey
Frequeney call such an explotion oE Animal Spirits
25 is Frequent in Cramps, Or Conrulions.
The
etfect oF this Porver, or this Oualiey in Bodies, ic
called Flasticity; and Bodies char hare it, Flastick
Bodies.
And 25 a Sost Body is a WMCH Wwhen press d
vields co the Scroke, and loles irs Former Figure, and
CaHNOL reCOVeF IE SelFagain: S6 an
Elastick B0d) 15 chac wes Cho iE Vields FOr a
While co che Siroak, yet can asterwards recover irs
formet Fipure by itsoon natural Pover; and il it
can do chis wich che lame Force a5 char which prest
uponit, welas tispertecty Clastrcal.
IF TherC WCLC HO FlasiCIEY, ChC LaWS OL MOTION
conclude them in some measure Elastical; and
charcher are (0 in proportion eo che srengch and
acurenels of the Sound ther omit.
MI. Reil sires thele Rules For the morion ot
elastick Bodies.
TH F OR L M.
sainst anocher, iletc Will be or remain in cach ehe
Pame relatire lelociey as rvas betore; thatis, such
Bodies ill recede trom cach orher wich the lame
Velocier chac they met together with.
For the compressire Force, or the magnitude or
the Srroak in any giren Bodies, arises trom there-
latire Velocier ofchose Bodies, and is proporrional
coir: And Bodies perfectly Flastick, ill rectore
themlelres complearty to the Figure ther had be-
fore theShock; Or in other mords, the Restitutire
Found by Machemaricians, about the Percussion of  Force. is equal ro the Comprestire, and theretore
erro Bodies, ivould hold univertally, and be writhour  must be equal ro the Force wich which they ac
exception eruc: And che Bodies (a5 Mr. Keit ob- ceded, and consequently cher must by Flasticirs
serres in his Introduct. ad Veram. Phylicam. P. 15T.)
vould more joes hac vas conatus Wntenthe
Aronset Bodr cended betore the Shock OF PerCuI-
tion, and wich a Cclertes cams aca. 6y
those TaWS OF Morion. But because chere are
verr ter Bodies wichour lome degree ot Flasticitr,
recede asain trom each orher wirh che same Velo.
cirY. D. F. D.
COROLL AKL.
Ftence tatine equal. Fimes Belore and asrerthe
eren (oEr Clar, Wax, C50. containins wichinthem Stock, and che Distances berween the Bodies will
Come Particles os Flastick Air; From hence ic is be equal, and cheretore the distances of che Bodies
Bodies wrhich Arike or move one against another,
do sprins or leap back, and more, wich very dif-
ferent Velociries, somerimes onc vras, lomerimes
another.
From the common Center oF Graricy will in che
Tame Times be equal.
Whence che LaWS OEthe meerins oF Bodies per-
sectls Flastick, are castr deduced, wtrich he dorh
by chis Problem.
 rvo Podies persectir Flastick, Arikee Me a.
Courrot Justices Trinerant. And Justices in Fyre
Fusticiarios itinerantes, ot the Egre. The Eyre alse
Ot the Forest, is nochine buc the fustice-Seat, Orher.
FLABORATORY. SeC Laborator
FLASTICK Force, Prinasus, lsele Torce ot
I rou imagine a Srrins or Wyrerobe Krainca
and lastned tirm ac cach end, chen ris plain, chac
IE Cithes the middle parr of che Scrins (Or anv o-
ther) De cicher drawn by che Fland or prels d by 2
WVeISHE out oF che righe Position ic as at tirst in,
then it the Force chac removed ic be nOL Grearer
chanthe Flastick Force of che Scring, the Scrine
Wvill AV Back, and if che WVeigh or Body bc nor
remored, drive it before ic, as the Scrins ota Cro(s-
Bor doch che Bullet; and che acquird Velocier oF
ihc Serins will carry ic berond its Ars righe POs.
tion toards the opposire Parrs, and that (0 Far 25
eill che morion thac var be equal roche Flacticir
Ot che Scring; and chen being quire destroy d, che
String ill recurn again asbefore; and ehus spring
ins Forwards and backvard, vould (abstractly
trom che Resistance oF rhe Medium) like a double
Pendulum, makce continual Vibrations. Thusallo
it rou Cuppole ans weighe ro Fall on an immorabis
six d aud perfectly elastick Body; onche Conract
che Parrs oF che elastick Body Wvill spring back or
recede inwards, rill che clastick Foree be raised up
equal ro che Momentum ot che fallins Body; and
chen chis larter cealins, che clastick F’orce wiil cas
che Body uprards or from ic, wich the lame Velo-
cier ic came donn, or as impelled against ic, re
coverins again itsFormer Figure. Buc it boch he
I F N
T0 determine the Rules es the direct mectins or sock
of bodies perfects Llastical.
One Construction will serve For aIl Cates oF chis
Problem,
Lecthere Detiro Bodies A and B Perrec LId-
Rical, wrhose common Center oF Grariey let bel,
and let D be rhe point of Concourle where che B0-
diesmeer; make C P alvars equal ro C D. Then
PPar Thac atter the Concourse or Shock, the righE
Line C F will express rhe Velociry of che BodY A,
From P cowvards A; and che rioht Line E B will ex
prets che Velociry oF rhe Body B, Trom E. ronards
3.
Dodies beims Felatich, nerhec ol chem be hed oc