Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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poſſit. </
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<
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">Hoc profectò negatur, quia licèt aer non ſit
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leuis, ſed per extruſionem à medio fluido ſursùm̨
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expellatur, efformare debet quoque eminentiam il
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lam contornatam, & acuminatam, vt demonſtratum
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eſt. </
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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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">Sed vtile erit parumpèr circumſtantias huius ex
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perientię accuratiùs perpendere, inquit enim,
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par
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tem fistulæ ſuperiorem conuerte deorsùm, & erige fiſtulam
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perpendicularitèr ad horizontem, videbis enim aerem, qui in
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fundo fiſtulæ habuerat formam cylindri occupantem totam
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cauitatem fistulæ in latum mox aſcendere, & ſic aſcendere,
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vt ſe coarctans extendat in longum, & ſuperiorem cylindri
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illius ſuperficiem, quæ plana erat ad modum diſculi, iam
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conoidem factam eſſe.
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<
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cenſet quòd
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quãdo
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fiſtula RV
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perpẽ-dicularitèr
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dicularitèr</
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ad
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abbr
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horizõtem
">horizontem</
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eleuatur, ae
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rem ROPX, quidum ſupernè conſiſte
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bat cylindricam formam habebat,
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etiã
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in hoc ſitu infimo perſeuerare poſſę
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per aliquod tempus in eadem figurą
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cylindrica, quod profectò ſi verum eſ
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ſet non facilè reddi ratio poſſet quare, & quemad
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modum à compreſſione aquæ
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ſuperincumbẽtis
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pla
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na aeris ſuperficies OP efficiatur tumida, & conue
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xa, veluti eſt ABC. </
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<
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">Alia igitur longè diuerſa ratione
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res ſe habet. </
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