Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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1cujuſvis diſtantiarum: attractiones acceleratrices in corpora tota
erunt ut corpora directe & diſtantiarum dignitates illæ inverſe.
Ut
ſi vires particularum decreſcant in ratione duplicata diſtantiarum
a corpuſculis attractis, corpora autem ſint ut A cub.& B cub.ad­
eoque tum corporum latera cubica, tum corpuſculorum attracto­
rum diſtantiæ a corporibus, ut A& B:attractiones acceleratri­
ces in corpora erunt ut (Acub./Aquad.) & (Bcub./Bquad.) id eſt, ut corporum la­
tera illa cubica A& B.Si vires particularum decreſcant in ra­
tione triplicata diſtantiarum a corpuſculis attractis; attractiones
acceleratrices in corpora tota erunt ut (Acub./Acub.) & (Bcub./Bcub.), id eſt, æqua­
les.
Si vires decreſcant in ratione quadruplicata; attractiones in
corpora erunt ut (Acub./Aqq.) & (Bcub./Bqq.) id eſt, reciproce ut latera cubi­
ca A& B.Et ſic in cæteris.
DE MOTU
CORPORUM
Corol.2. Unde viciſſim, ex viribus quibus corpora ſimilia tra­
hunt corpuſcula ad ſe ſimiliter poſita, colligi poteſt ratio decre­
menti virium particularum attractivarum in receſſu corpuſculi at­
tracti; ſi modo decrementum illud ſit directe vel inverſe in ratione
aliqua diſtantiarum.
PROPOSITIO LXXXVIII. THEOREMA XLV.
Si particularum æqualium Corporis cujuſcunque vires attractivæ
ſint ut diſtantiæ loeorum a particulis: vis corporis totius ten­
det ad ipſius centrum gravitatis; & eadem erit cum vi Globi
ex materia conſimili & æquali conſtantis & centrum habentis
in ejus centro gravitatis.
Corporis RSTVparticulæ A,
Btrahant corpuſculum aliquod
126[Figure 126]
Zviribus quæ, ſi particulæ æ­
quantur inter ſe, ſint ut diſtan­
tiæ AZ, BZ; ſin particulæ ſta­
tuantur inæquales, ſint ut hæ par­
ticulæ in diſtantias ſuas AZ, BZ
reſpective ductæ.
Et exponan­
tur hæ vires per contenta illa
AXAZ& BXBZ.Jungatur AB,
& ſecetur ea in Gut ſit AGad BGut particula Bad particulam A;

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