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

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              <s id="s.002573">
                <pb pagenum="209" xlink:href="025/01/223.jpg"/>
              biè ſuccedere debent; nempe vbi ſuprema portio annuli versùs Boream, ima
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              versùs Auſtrum accedit, hæc infra imam globi deſcendit, illa ſupra ſum­
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              mam attollitur, explicantur lacunæ, vmbra, ſeu niger ille tractus à radiis ſo­
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              laribus in planum annuli liberè appulſis expungitur; vbi verò ſuprema an­
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              nuli ad Auſtrum, ima ad Boream deflectit, ſuprema globi portio ſupra ſum­
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              mam annuli, infima infra infimam extat, contrahuntur lacunæ, & vmbra
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              projecta, ſecundùm nigrum tractum, planum annuli ſecat. </s>
            </p>
            <p type="main">
              <s id="s.002574">Hujus porrò nutationis, ſeu tremulæ Librationis annuli cauſa in prom­
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              ptu eſt; nempe cum ea vi polleat annuli planum, qua prædictum paralleliſ­
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              mum cum Æquatoris plano retineat, in toto illo declinationis tractu, tum
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              versùs Auſtrum, tum versùs boream, continuum niſum exerit, ad hunc fi­
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              nem obtinendum; idque motu quodam accelerato, cujus perfectam analo­
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              giam habemus in
                <expan abbr="funepẽdulis">funependulis</expan>
              , in chordis pulſatis, in reciproco Planetarum
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              motu ab Apogæo ad Perigæum, &c. </s>
              <s id="s.002575">Quo fit, vt terminum illum, ad quem
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              tendit, ſemper excedat, eatque ſemper, redeátque viciſſim, vt videre eſt in
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              exemplis ſupra indicatis. </s>
            </p>
            <p type="main">
              <s id="s.002576">Cur verò hæc Libratio, ſeu nutatio fiat circa majorem Diametrum ap­
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              parentis ellipſeos, ſatis manifeſtum eſt; cum hæc Diameter lineam mo­
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              tus annuli dirigat, ac proinde eidem parallela eſſe debeat; cujus rei analo­
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              giam habemus in omnibus aliis mobilibus planis; ſic enim totum annuli
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              planum eidem lineæ parallelum manet, juxta commune principium do­
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              ctrinæ motuum, cujus mentionem feci in Dialogis, quo fit, vt mobile ſuo
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              nutui relictum, eo motu moveatur, quo faciliùs moveri poteſt. </s>
            </p>
            <p type="main">
              <s id="s.002577">Inde autem perſpicua ratio ducitur hujus paralleliſmi, nempe planum il­
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              lud parallelum eſſe debet plano illius circuli, in quo movetur, juxta prædi­
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              ctum principium; ſed movetur in circulo diurno, parallelo ſcilicet Æquato­
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              ris plano, quid mirum igitur, ſi planum annuli Æquatoris plano paralle­
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              lum ſit: & verò inde facilis ratio ducitur, propter quam Deus Naturæ Au­
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              tor planum illud annuli, in dicto ſitu, circa Saturni globum collocavit, ni­
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              mirum vt viſibile argumentum oculis mortalium, fideli Teleſcopio inſtru­
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              ctis ſubjiceret, contra terræ motum; nempe in eo circulo dictus annulus
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              movetur, cujus plano planum annuli parallelum eſt; cum igitur parallelum
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              ſit plano circuli diurni, &
                <expan abbr="planũ">planum</expan>
              hujus, plano Æquatoris, in circulo diurno
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              prædictus annulus movetur, non verò in Ecliptica; vnde Terræ
                <expan abbr="globũ">globum</expan>
              quieſ­
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              cere, neceſſe eſt: tanti momenti fuerit, falſam illam hypotheſim deſtruere, vt
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              Divina Providentia, eam dedocere, & illius falſitatem viſibili argumento
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              Mortalibus demonſtrare dignata ſit; non eſt igitur, quod aliqui dicant, præ­
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              dictum annulum commentitium eſſe, nullo vſu, commodo & fine in cœlis
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              deſcriptum; cum Deus illum, ad finem adeò nobilem & penè neceſſarium
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              condiderit, & in eo ſitu collocârit; nimirum ad errorem illum de terræ mo­
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              tu multorum animis tam altè inſitum, penitùs abolendum; vnde non dubi­
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              to, quin aliqui dicturi ſint, majorem illam Diametrum apparentis ellipſeos
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              plano Æquatoris, id eſt, tangenti circuli diurni punctum, in quo Saturni
                <lb/>
              globus ſitus eſt parallelam non eſſe: ſed noſtris, oculis credimus, inſigni
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              Teleſcopio inſtructis; acto enim tranſverſo filo non procul à lente oculari, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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