Baliani, Giovanni Battista
,
De motu naturali gravium solidorum
,
1638
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<
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">PROPOSITIO XXII.
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<
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">Si duo gravia descendunt alterum quidem perpendicu-
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lariter, alterum vero super plano declinante, perve-
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niunt ad idem planum Orizontale tali ratione, ut sit
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eadem proportio inter diuturnitates eorum, quae in-
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ter perpendicularem, & declinantem.
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<
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id
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">Sit linea AB perpendiculariter erecta super plano Ori-
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zontali BC, & AC planum declinans.
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<
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">Dico quod diuturnitates gravium descendentium per AB, &
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per AC, sunt ut AB ad AC.
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<
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id
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">Ducatur BD normalis ad AC.
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<
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id
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">Quoniam est ut AD ad AC ita quadratum temporis AD
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ad quadratum temporis AC
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, & tempora AD, & AB
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sunt aequalia
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, & proinde eorum quadrata
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, ergo ut A
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D, ad AC ita quadratum temporis AB ad quadratum tem-
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poris AC, sed ut AD ad AC ita quadratum AB ad qua-
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dratum AC
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, ergo ut quadratum temporis AB ad qua-
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dratum temporis AC, ita quadratum AB ad quadratum
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AC
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, sed quia latera sunt inter se ut eorum quadrata
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, est
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ut AB ad AC ita tempus AB ad tempus AC. </
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<
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">Quod, &c.
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Per cor.
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7. hujus.
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Per 15.
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hujus.
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Per 2.
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pron.
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Per 19.
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Sexti.
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<
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Per 22.
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Quinti.
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<
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Per 24.
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Sexti.
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