Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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161
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turque. </
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<
s
id
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">Et tunc ſolummodò ab inuicem ſegregantur
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ſubdiuidunturque, quando medium fluidum vehe
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menti, & irregulari motu fluidum per ipſum aſcen
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dens, vel deſcendens perrumpit diuiditque, ſeù quia
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non omnes partes prædicti fluidi excurrentis æquali
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impetu mouentur, vel quia laterales partes fluidi ab
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aſperitatibus, & contactibus laterum fiſtulæ retar
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dantur, ſeù ab aliqua alia cauſa detinentur: nil igitur
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ex hoc pro leuitate poſitiua acquiritur. </
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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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">Subdit poſtea idem author, quòd
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aqua ſupernè re
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tunderet aeris tumorem, & infernè illum, quaſi forcipe
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comprimens, conſtringeret ad figuram conoidem eius partem
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infimam.
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</
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<
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id
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"> Reſpondetur hoc falſum eſſe, quia vt iam̨
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demonſtratum eſt nunquam figura aeris per aquam
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aſcendentis acuminata in eius infima parte effici poſ
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ſet, ſed neceſsè eſt, vt ab impulſu facto ab aqua gra
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uiori ibidem excauetur ad modum ſcutellæ, & prop
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ter occurſum, & obſtaculum aquæ ſupremæ dum aer
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fluidus aſcendit tumorem, & conuexitatem ſuper
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nè acquirat. </
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<
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">Cùm verò idem author ſubdit, quod
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ſi caſu copule
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tur particula aliqua aeris cum oleo per aquam aſcendente,
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conſtat quòd huiuſmodi aggregatum velociùs aſcendit per
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aquam.
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Nõ
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video quidnam ex hoc deduci poſſit pro
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leuitate poſitiua, imò nego quod
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non posſit reddi phy
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ſica, & ſolida ratio cur velociùs moueatur coniunctum il
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lud ex oleo, & aere, quàm oleum ſolum.
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</
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<
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id
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"> Et poſtea:
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neque
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aquam citiùs deſcendendo expellere quoque citiùs oleum
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ſursùm cum nec maior moles ſit aquæ ſupra
<
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abbr
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oleũ
">oleum</
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, quàm an-
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