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.</s>
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              Cap. 4. poſi­
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              tiuam leui­
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              tatem noņ
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              dari.</s>
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            <p type="main">
              <s id="s.000806">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
                <expan abbr="breuiſſimũ">breuiſſimum</expan>
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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. </s>
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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.</s>
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            <p type="main">
              <s id="s.000809">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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              extra fistulam ſubiectum aerem perrumpit, non verò illum
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              ambiens intra ſe recipit.
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              </s>
              <s id="s.000810"> Hic primò noto, quòd non
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                per</expan>
              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. </s>
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            <p type="main">
              <s id="s.000811">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. </s>
              <s id="s.000812">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- </s>
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          </chap>
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