Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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              <s id="s.002281">
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              ſum habet in hac phyſices parte, quam præ manibus
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              habemus; propterea operæpretium duxi firmis de­
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              monſtrationibus eam confirmare; vt autem hoc cla­
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              rè, & perſpicuè oſtendi poſſit, præmitti, & memorari
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              debent aliqua principia lumine naturæ nota, quorum
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              primum erit.
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              Cap. 10. de
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              æquitempo­
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              ranea natu­
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              rali veloci­
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              tate
                <expan abbr="grauiũ">grauium</expan>
              .</s>
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            <p type="margin">
              <s id="s.002283">
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              Repetuntur,
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              & præmit­
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              tuntur ali­
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              qua princi­
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              pia nota, aut
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              alibi
                <expan abbr="oſtẽſa">oſtenſa</expan>
              .</s>
            </p>
            <p type="main">
              <s id="s.002284">Cuilibet corpori graui tributum, ac aſſignatum̨
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              fuiſſe ab ipſa natura
                <expan abbr="gradũ">gradum</expan>
              , &
                <expan abbr="periodũ">periodum</expan>
                <expan abbr="determinatũ">determinatum</expan>
              ,
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                <expan abbr="præfixũ">præfixum</expan>
              , ac inuariabilem velocitatis, quo
                <expan abbr="deſcẽdere">deſcendere</expan>
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                <expan abbr="deorsũ">deorsum</expan>
              valeat, quia nimirùm principia, & cauſæ
                <expan abbr="mo-tuũ">mo­
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                tuum</expan>
                <expan abbr="naturaliũ">naturalium</expan>
              in
                <expan abbr="ijſdẽ">ijſdem</expan>
              corporibus
                <expan abbr="eædẽ">eædem</expan>
              omninò ſunt, </s>
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            <p type="main">
              <s id="s.002285">
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              quæ ſuos effectus producere valent, qui non erunt
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              vagi, & indeterminati cum natura certa neceſſitate
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              operetur, ergo fieri non poteſt, vt idem corpus ex
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              ſui natura, ablatis omnibus externis impedimentis,
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              poſſit modò celeriùs, modò tardiùs, abſque vlla regu­
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              la per idem ſpatium eodemque tempore moueri, ſed
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              ſemper conſtanti, ac inuariabili progreſſu vniformi­
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              ter accelerato migrabit.
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              </s>
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            <p type="margin">
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              I.</s>
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            <p type="margin">
              <s id="s.002287">
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              II.</s>
            </p>
            <p type="main">
              <s id="s.002288">Motus eiuſdem corporis grauis à conſiſtentia me­
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              dij fluidi impeditur, & retardatur prout reſiſtentią
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              maior, vel minor fuerit, contingit tamen ex acciden­
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              ti, vt figura varia eiuſdem corporis grauis maius, aut
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              minus impedimentum patiatur ab eodem fluido. </s>
              <s id="s.002289">
                <expan abbr="cõ-ſtat">con­
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                ſtat</expan>
              enim experientia, quod aer, & aqua magis obſi­
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              ſtunt, impediuntque tranſitum figuræ dilatatæ alicu­
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              ius laminæ, minùs verò refragantur migrationi cor­
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              poris acuminati. </s>
            </p>
          </chap>
        </body>
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