Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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cidit præcisè in recta linea MI
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perpendiculari ad horizontem,
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quæ per centrum ſuſpenſionis
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ducitur. </
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<
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">Modò agitetur aqua va
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ſis, vt nimirùm pars EF deſcen
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dat, pars verò KG, ſursùm ten
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dat, & hoc per aliquod tempus
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perſeueret continuatis reuolu
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tionibus, dummodò planities libellæ, AD non alte
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retur; frigitur verum eſt in tali caſu, quòd grauitas
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aſcendentis aquæ KG deſtruitur quatenus à virtute
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impulſiua proiectitia ſursùm impellitur, & è contrà
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ſi grauitas, & impetus aquæ deſcendentis EF dupli
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catur, quia eius ponderi ſuperadditur vis proiectiuą
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deorsùm, igitur medietas vaſis MAB, aut leuis effi
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cietur, aut valdè eius grauitas priſtina imminutą
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erit, & è contrà reliqua vaſis medietas MDC
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duplò grauior facta erit, proindeque terminus
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libræ L deprimetur, eleuabiturque oppoſitus ter
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minus libræ H, quod tamen falſum eſt, igitur quo
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modocumque aqua agitetur, dum in ipſamet aqua, &
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in proprio loco continetur, neque amittit ob aſcen
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ſum, nec acquirit ob deſcenſum nouam grauitatem̨. </
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Cap. 3. flui
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dum in ſuo
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toto quie
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ſcens pon
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derat.</
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<
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id
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">Sed faciliùs hoc experieris, ſi intra vas ABCD in
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ſeratur rota EGKF perpendicularitèr horizonti ere
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cta, & parietibus oppoſitis vaſis infixo axe eius iņ
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M vt facilè rota conuerti poſſit. </
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<
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id
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">Et ſiquidem centrum
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grauitatis totius aggregati cadit in recta lineą
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IM perpendiculari ad horizontem, tunc ſiue rotą </
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