Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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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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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 poſito quòd in vehementiſſima turbinatione
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retineretur pauliſpèr aqua adhærens fundo ſupremo
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fiſtulæ, & proinde aer infimus ſaltem per
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ſpatium cylindricam formam ORXP retineret, mani
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feſtum eſt, quòd ſubito ceſſante impetu aqua vt gra
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uior aere deorsùm deſcenderet, labereturque, aut
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in loco intermedio fiſtulæ, aut ad latera, prout vndu
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latio partium aquæ eam promoueret, & ſic ſemper à
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deſcenſu grauioris aquę figura tumida, & conuexa
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aeris aſcendentis crearetur, numquam verò ſpontę
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ab ipſa leuitate aeris. </
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Reſponde
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tur ſingulis
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oppoſitioni
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bus aduer
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ſarij.</
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<
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">Cùm verò inſtat:
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Si idcircò aer ſursùm tendit, quia ab
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aqua deorsùm tendente extruditur in ſuperiora aqua potiùs
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peruaderet cuneatim aerem, quem admodum aqua
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decidẽs
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extra fistulam ſubiectum aerem perrumpit, non verò illum
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ambiens intra ſe recipit.
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<
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"> Hic primò noto, quòd non
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per</
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aqua cadens aerem penetrat, nam multoties
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penetratur ab ipſo aere quando nimirùm ſcinditur
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in plures partes, vt contingit in pluuia, vel potiùs
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quando è feneſtra catino aqua proijcitur. </
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<
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id
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">Sic paritèr maſſa pulueris terreſtris è turris verti
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ce proiecta licèt in principio ſit vnita, nihilominùs
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ab aere diſſipatur, diſpergiturque, idemque accidit
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in fumo aſcendente per aerem. </
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<
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id
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">Secundò noto, quòd
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partes aeris, vt dictum eſt, ſponte ſua connectuntur
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colliganturque inter ſe, & proinde intra aquam po
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ſitæ omnes vniri debent, atque ſimùl, conglobatæ
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per aquam aſcendent, non ſecùs, ac partes aquæ in
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tra aerem, vel oleum viciſſim vniuntur, congloban- </
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