Fabri, Honoré, Dialogi physici in quibus de motu terrae disputatur, 1665

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      <text>
        <body>
          <chap>
            <p type="main">
              <s id="s.000431">
                <pb pagenum="36" xlink:href="025/01/040.jpg"/>
              motus ex recto accelerato & circulari compoſitus eſſe videatur; hinc
                <lb/>
              initio ſpiſſiores & preſſiores ſpiræ, deinde verò diſtractiores fiunt; eſt
                <lb/>
              tamen tantùm vnus impetus ad motum deorſum rectum per ſe determi­
                <lb/>
              natus, qui cùm in linea recta finem ſuum obtinere non poſſit compenſat
                <lb/>
              in circulari, retenta ſemper prima illa inclinatione ad rectum, cui quan­
                <lb/>
              tum poteſt, ſatisfacit, cùm autem etiam ſecundùm id acceleratus ſit, in­
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              de ſpiras diſtrahi neceſſe eſt. </s>
            </p>
            <p type="main">
              <s id="s.000432">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.000433"> Iam capio, quod ante dixeras, naturam ſupplere æquali­
                <lb/>
              tatem motuum: nempe aqua, ſeu corpus grave toto illo tempore, quo
                <lb/>
              præfatus cylindrus aëris ſenſim aſſurgit, motu accelerato deorſum, re­
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              moto impedimento, longum ſpatium in perpendiculari decurreret; ſed
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              obſtante impedimento, cùm eadem vis impetus adſit, motum rectum
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              ſpirali compenſat; atque adeò ſi tota illa ſpirarum congeries in lineam
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              rectam explicaretur, æqualis eſſet lineæ rectæ in perpendiculo eodem
                <lb/>
              tempore motu accelerato confectæ, ſed applica quæſo ad ſpiras Solares. </s>
            </p>
            <p type="main">
              <s id="s.000434">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.000435"> Repete igitur figuram 2. & conſidera primo loco primam in­
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              clinationem ſeorſim, quâ Sol ab Apogæo ad Perigæum, & viciſſim, per
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              mediocrem diſtantiam, reciprocis acceſſibus & receſſibus, ad imitatio­
                <lb/>
              nem motus accelerati & retardati tendit reditque. </s>
            </p>
            <figure id="id.025.01.040.1.jpg" xlink:href="025/01/040/1.jpg" number="11"/>
            <p type="main">
              <s id="s.000436">Et cogita radium AE moveri cir­
                <lb/>
              ca AC, dum punctum E motu ac­
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              celerato tendit ad V, & retardato,
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              ab V ad H, radius AE deſcribet
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              ſuo motu ſuperficiem coni, cuius
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              baſis diameter, erit EL, punctum
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              verò E deſcribet tot ſpiras in dicta
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              ſuperficie coni, quot revolutiones
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              abſolventur, toto illo tempore,
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              quo ab E, pervenit in H ; hæc au­
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              tem ſpira erit conica, cuius Helices
                <lb/>
              diſtractiores erunt circa V, preſ­
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              ſiores circa E & H. </s>
              <s id="s.000437">Pari modo, co­
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              gita triangulum ADE in orbem
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              agi, circa Axem BC dum D, motu
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              accelerato, tendit ad F, & retar­
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              dato ab F, ad E; arcus DFE de­
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              ſcribet partem ſuperficiei ſphæricæ,
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              punctum verò ſpiram ſphæricam,
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              cuius Helices preſſiores erunt cir­
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              ca DE, diſtractiores verò circa F.
                <lb/>
              </s>
              <s id="s.000438">Si verò D iret per lineam rectam
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              DGE, deſcribet DGE ſuperfi­
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              ciem cylindricam, & D ſpiram cylin­
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              dricam. </s>
              <s id="s.000439">Iam verò
                <expan abbr="cõponaturvtraque">componatur vtraque</expan>
                <lb/>
              inclinatio, ita vt D partim versùs F, </s>
            </p>
          </chap>
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