Borro, Girolamo, De motu gravium et levium, 1575

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            <subchap1>
              <p type="head">
                <s id="s.000444">Quid ſit, elementa à ſe per ſe moueri: in quo de
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                multiplici mouendi principio.
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                </s>
                <s id="s.000445">Cap. XXXV.</s>
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              <p type="main">
                <s id="s.000446">MVLTA
                  <emph type="italics"/>
                hactenus diximus, quæ ad elementorum
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                naturam explicandam pertinere videbantur;
                  <expan abbr="nũc">nunc</expan>
                ad
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                ea explananda, par eſt, vt aggrediamur, quæ ad ele­
                  <lb/>
                mentorum motus principium agnoſcendum, nos, veluti manu
                  <lb/>
                ducere poſſunt. </s>
                <s id="s.000447">Corpora ergo hæc elementorum ſimplicia mo­
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                ueri à ſe per ſe, nihil eſt aliud, quam ea habere congenitum
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                principium intrinſecum ſui motus naturalis, & hoc
                  <expan abbr="principiũ">principium</expan>
                  <lb/>
                est duplex; quoddam primum, &
                  <expan abbr="cõmunissimum">communissimum</expan>
                nempe na­
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                tura, quæ est principium motus, & ſtatus, illius in quo eſt: pri­
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                mum, & per ſe, non per aliud, alienaque vi, quod est per acci­
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                dens: vt ſcripſit Ariſtoteles libro ſecundo de Phyſico auditu
                  <lb/>
                particula tertia, de quo communissimo motionum principio
                  <lb/>
                hic verba non facimus: quippe cum, per hoc principium, ſim­
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                plicia à mixtis corporibus, in motu nulla ratione differant:
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                quandoquidem ſimplicium, & mixtorum naturæ, ac motio­
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                nes à naturis manantes, ſub eamdem communem naturæ de­
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                finitionem cadant: immo ratione huius primi, & communiſ­
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                ſimi principij nulla eſt inter res, & motus naturales differen­
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                tia: quod res naturales ſeu ſimplices, ſeu mixtæ, &
                  <expan abbr="earũdem">earundem</expan>
                  <lb/>
                naturalium rerum motiones, quibus ſuſque, deque aguntur,
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                huius primi communissimi principij complexu coerceantur.
                  <emph.end type="italics"/>
                </s>
              </p>
              <p type="main">
                <s id="s.000448">
                  <emph type="italics"/>
                Hac eadem ratione cælum, quod & ipſum, vt vniuerſalis
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                cauſa elementa mouet, ſemper excipimus, quando particula­
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                res
                  <expan abbr="motuũ">motuum</expan>
                cauſas hic inueſtigare decreuimus. </s>
                <s id="s.000449">A cælo enim,
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                vt ab vniuerſali cauſa, reliqua omnia, dum naturam, &
                  <expan abbr="vitã">vitam </expan>
                  <emph.end type="italics"/>
                </s>
              </p>
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