Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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171
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perforauimus fundum vaſis IH, vt nimirùm è partę
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ſubiecta aer ſuccedere poſſet ad replendum
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abbr
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vacuũ
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,
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& ſic leuitas poſitiua ligni G abſque vacui periculo
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commodè ſursùm aſcendere poſſet; hac præparatione
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facta, illa lignea pila fundum non dereliquit, nec ſur
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sùm aſcendit; nec paritèr aſcendit poſtquam
<
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abbr
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foramẽ
">foramen</
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<
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H occluſum denuò fuit, & cauitas ſubiecta EIF, &
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ſuprema AED repleta hydrargyro fuit. </
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<
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id
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">Vnde dedu
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cere poſſumus pilam non à poſitiua leuitate eleuari,
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ſed potiùs ab expreſſione ambientis fluidi quotieſ
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cumque excurrere poteſt abſque impedimento in
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fra ſuperficiem eiuſdem pilæ. </
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Cap. 4. poſi
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tiuam leui
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tatem noņ
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dari.</
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<
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<
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id
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">Perpendamus tandem poſtrema verba eiuſdem̨
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Authoris, qui ait:
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Sed quid dicent aduerſarij, ſi in fundo
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vaſis eſſet foramen amplum, anguſtius tamen cylindro, &
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occluſum, quod eodem momento aperiretur quo manus eleuat
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virgam? </
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<
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id
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">certè enim aqua efflueret deorsùm, & tamen cy
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lindraceum lignum illud tenderet ſursùm. </
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<
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id
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s.000874
">Agnoſcant ergò
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in ligno illo leuitatem aliquam, quæ impetum producendo
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ſursùm versùs priùs natura mouet, ac pellit
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abbr
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aquã
">aquam</
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, & cau
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ſaest vt aqua corpus fluidum it a illi cedat, vt ſubintret in
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illius locum, ne detur vacuum, eamque non exercere gra
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uitatem actu, ſed ſuperiores quidem aquæ partes impelli à
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cylindro ligneo, & cedere illi locum digrediendo ad latera,
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vt locum illarum partium impleant, quæ infernè
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ſubintrãt
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in locum cylindri.
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<
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"> Et hic nil aliud reſpondere poſſum̨
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niſi mirari confidentiam, ſecuritatemque qua aſſeri
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tur experientia non ſicuti reuera ſe habet, vtque à
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quolibet comprobari poteſt, ſed veluti præiudica
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ta opinio eis perſuaſerat. </
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