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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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Or movins on more llorvr chan A, and aCcOrd
ins coche same Direction wich ic: PCay, che Sum
ot the Motions in both Bodies, torrardsche lame
ParIS, thac is From C towares D, will bC the
E F express ies NOrion. L et D FF BC suppoSed
equal tO E F; (0 MalI C IL, Which is che Dit
ference oF their MOriOn COIArdS CONTTAEY PALES,
exprels thesum ot the Morions made rorvards (.
lay then, thac che tame C FI is the Summ OF
their Morions torards C, 25 vell alcer the Shock
25 betore ic: For atier the Shock, suppole the
Morion oF B ro be chansed, and eO Be nOW tO-
vards C, and let the Line P Cx reprelene il;
vheretore che Force impressed upon B atrex the
Stock, and wrtrich carries ic corards , will BC
equal to the Sum oF the Motions P F and G F,
lame a5 betore. L et C D express theMorion ot and consequently be expressed by FG: For in
A trom C to D; and is B be in Morion 100, char Rishe Line, the Morion L F, torards F
let P F exprels its Morion the lame ar. Then is destrozed; and the new onc, F. Cr, rowards 
Will che sum ot boch Morions be expressed by
CD. J FF. Bur becaule Action and Reaction
are alvays equal, and coraEdS C ONCFAEY PAFES;
it F C exprels che Morion impressed on B by
thC SErOnK OF A; DK, equal co ic, muct Cx-
press che Morion impressed on A by the Scroke
ot B, wich a concrary Direction trom D TO.
vards C. Wherefore since DH = FO, CH
will express the Morion of the BOdY A atter the
Shock, and F C che Morion OF B; and there
Fore the Sum oF boch will be C R -]. P C. BUE
since F C is supposed == IE D, if rou add C H
and F F tO bOth, F C -) CK must be equal
EO CD -) F F. Wheretore the Sum oF che
Motions et Boch is che same aS aF HEIL.
And HE F C bC equal EO C D, the LOHIIS LL
Produced. Buc now since che impulsire Force
in boch Bodies acts equalIr FOrATdS COntrary
Parrs, iF D R be made equal rO F C, chis MaII
represene che Force impressed on rhe Body A,
and carry ic in a contrari Direction eo its Former
Morion: S0 char if the Linc OF Motion D IX,
De caken trom the Line CD, there will remain
CH represemtins the true MOriOn OF A cowards
C. Burbecause DK = F C, and DFI =FF.
DR - DFI (1. c. KETI) = F G - F F (1. C.)
F C: And consequently since R II = F C
K HI wwill represent the Mocion oF the BOdY B.
atrer the Shock; but C I represenes che Mocion
DE A atrer ic: WVheretore C A is the Sum OF
the Morion in boch Bodies corards .
IF F C had been equal t0 CD, rhen thC
and C must be coincident; chac is, C I Will Poines P and C nould be coincident, and the
be = O, and consequeney che Body A, atter
che Occurse or Shocle, Will be quite at relt. BUE
iF F G DC greater chan C D, che Poine IE must
be found semenhiere berond ortoche Lelsland
OF C; and che NIOriOn OF A Will become chan-
sed rorards che contrary Parrs, and the sum ot
The Morions rorards C Will bc 25 FC =- CR:
Andbecause FC = CK, add to both F F C L
and ic WiIl _ at F F - = LC CR, (1. c.
E C  CK = E F  DK - CB, (1. c.
Mocion oF A will be quire destroved, (1. c.) aF
ter che Shock, A will be perfectiy ac rest, and
C A Wwill be equal 10 F Cr.
Burit F C Be Grearer rhan C D, che POInER
will Fall eo che Lesr Hland of C, and che NO.
tion oF the Body A wvill bc trom C towards R.
Buc (because F C = DK, and F F = D FI)
R II = P C; Wheretore cakins C R Fromboch,
CHI must be equal tO F C =- C IE; wtrich re-
prelenes che Sum oF the Morions made rormards
F F- F CD. From whence ris plain char che che Came Parrs, and cheir Ditterence cowards
Sum of the Mocions rorards che lame Parrs conrrarr ones atrer the Shock: WVheretore che
(wtuch in this Case is their Ditterence corvards Sum oE che Morions tomards che lame Parts re-
contrary ParIS) continue che lame atrer che mains che lame atrer, as betore che Shock.
Shock as betote.
Arike 2gaintt one anocher, che sum ot theis
Morion, atcer chac, will be che lame as belore.
Our Excellent Mathematician Or. Wal
lisq in a Letter tothe Famous MIr. OI-
derbursh Secretary of the ROyalSO-
ciets, sivesthe follomine Short Account
of The LaWS OF Motion, NOV. 26.
1688. And intimated, that they mere
made Publicte Fizht Months before, ab
the Meeting of the Royal Society.
1. F any AgenE, 25 A, produce al) L
25 E; then an Agent, a5 2 A, will produce an
EHect, 25 2 F; 3 A, 25 3 L, (9C. ceteris pari-
bus. Andunirersalls, il m be pur For ThC Expo-
HEnEOF FhC POIEF, m A, 25 m F.
Tecthe Body A m
accordins r0 che Di-
rection C D, and in its way stritre acainst
the Body B; Which suppose ro be cicher ac rest,
CDR. ACcer che lame il will appear, il mans
Bodies, inorins ich che lame Direction, Mould
II. Y Tuo Dodies move comards each other mith
exactlus contrary Directions, the sum of their
Motions tomards the same Parrs (hich is alt
one as the Difference of them tomards contrary
Pares) will continue the same aster st sibik
is before it.
Texthe Body A more trom C tormards D, and
2. Whecctore il any Loscc, a5 V CWtilea
e Cona) Leo  L. 1 L,   ate i F, ceteris paribus; viz. wich che same
Ceteties.
tet C D expreis irs Line oF Morion; and letthe Ctands For Vis) move any Weighe, Mals, Ot
Body B be movine at rhe same time rith a Body, as P; the Force, which is as m V, Mal