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# Title: Phoronomia, Sive De Viribus Et Motibus Corporum Solidorum Et Fluidorum Libri Duo (shelfmark Leibn. Marg. 182)
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DE VERTBDS ETMIOTEBOS CORPOROM.
terix; aut Geometrica phrasi eandem proterendo; quod corporum
pravitates seu pondera Massis ipsorum proportionalia sint. IIlustr.
Vertonus, lumeis accuratissimis pendulorum experimentis hanc, gra-
rium proprietatem se semper comperisse teltatur Pas. 305. Princ.
Phil. Nac. Math. primae edic. quam etiam ex Coroll. l. PFOp. XXIV.
LIb. II. eleganter elicuit. Nobilis. Elugenius hanc proprietatem
non Polum admittit, sed eriam pag. 240. Diatribae De Caussa Gra-
vicatis ex regulis motus deducit. Et quia haec corporum affectio
per universam Philosophiam Nacuralem magni momenei est, aliam
adhuc ejus demonstrationem adducere tentabo, admissà unicd quae
sequitur hypothelt.
TIY POY H F SIS.
27. Padem manente Materiae quantitate, es directionibus cravium
existentibus parallelis, seu in Centro indefinite distanti converzentibus,
pondera corporum non mutantur, variatis eorum positione respectu Bo-
rizontis ex sieurae.
Hloc est, corpus quodris idem pondus retinet, quocunque mo
do id politum sit respectu horizontis, nec ejus pondus mutari cen-
sendum, si ejus tigura in aliam, quamcunque scilicet, in globum,
erlindrum, conum ecc. mutata sic, modo eadem manserit mate.
riae quantitas, seu malla.
EROPOSITIO I. L E M N A.
28. Caussa cravitatis, quaecunque ea sit, non tantum asit in partes
exteriores corporum, sed etiam in interiores omnes.
Nam sI GTAVIEAtIS CAUTA In CXFCrIOreS FaNEUM COrPOrUM partes
ageret, in eas solum ascret, quae horizonti arerla lunt corporum
superticies, atque adco corporum pondera hilce superticiebus pro-
portionalia esent: atqui, pro varia corporis politione e situ, Tu-
perticies horizonti arerla modo major modominor cA; ergo, s gra-
vitatis imprestiones superticiebus hilce proportionales cnent, se-
queretur, mutari corporis pondus, pio alio atque alio ejus litu,
contra hypothesin.
Deinde, sI GTAVIEAS FaNEUM AGCTCE In EXFCrIOTeS COrPOTuM DarteS,
non vero in interiores omnes, sequeretur, quod, inutata Agura
corporis, led eadem manente materia quantitate, aliud acque aliud
inde relultet corporis pondus; quandoquidem rariaris tiguris ra-
rian.