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Si particularum aequalium corporis cujuscun{que} vires attractivae sint ut distantiae locorum a particulis: vis corporis totius tendet ad ipsius centrum gravitatis; & eadem erit cum vi globi ex materia consi∣mili & aequali constantis & centrum habentis in ejus centro gra∣vitatis.
Corporis RSTV particulae A, B trahant corpusculum aliquod Z viribus quae, si particulae aequantur inter se, sint ut distantiae AZ, BZ; sin particulae statu∣antur
Eodem argumento si adjungatur particula tertia C; & com∣ponatur hujus vis cum vi A+B×GZ tendente ad centrum G, vis inde oriunda tendet ad commune centrum gravitatis globi il∣lius G & particulae C; hoc est, ad commune centrum gravitatis trium particularum A, B, C; & eadem erit ac si globus & parti∣cula C consisterent in centro illo communi, globum majorem ibi componentes. Et sic pergitur in infinitum. Eadem est igitur vis tota particularum omnium corporis cujuscun{que} RSTV ac si corpus illud, servato gravitatis centro, figuram globi indueret. Q.E.D.
Corol. Hinc motus corporis attracti Z idem erit ac si corpus attrahens RSTV esset Sphaericum: & propterea si corpus illud attrahens vel quiescat, vel progrediatur uniformiter in directum, corpus attractum movebitur in Ellipsi centrum habente in attra∣hentis centro gravitatis.