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

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s id="s.000530">
                <pb pagenum="48" xlink:href="025/01/052.jpg"/>
              tam, & compoſita ex reſidua, & addita ſit omnium poſſibilium minima;
                <lb/>
              ſed his omiſſis & ſuppoſitis, eo motu hic cylindrus, atque adeò cœteris
                <lb/>
              paribus, quodlibet corpus movetur, ſive ab intrinſeco, ſive ab extrin­
                <lb/>
              ſeco, quo faciliùs moveri poteſt; idem obſervamus in ſagittis aliiſque
                <lb/>
              corporibus oblongis, ſi vel aliquando ſponte ſua cadunt, vel projiciun­
                <lb/>
              tur; ſed luculentum exemplum omittere non poſſum, globi ſcilicet per
                <lb/>
              planum declive deſcendentis, cùm enim duobus modis deorſum ferri
                <lb/>
              poſſit. </s>
              <s id="s.000531">Primò vno dumtaxat motu centri, quo ſingulæ partes per lineas
                <lb/>
              plano inclinato parallelas eant. </s>
              <s id="s.000532">Secundo motu rotationis, mixto ſcilicet
                <lb/>
              ex motibus centri & orbis; hoc ſecundo modo movetur, non verò pri­
                <lb/>
              mo, quem multus partium affrictus maximoperè retardaret. </s>
            </p>
            <p type="main">
              <s id="s.000533">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              Hæc concedere non poſſum; ideò enim movetur hoc motu,
                <lb/>
              quia cùm centrum gravitatis globi ſit extra perpendiculum, quid mirum, ſi
                <lb/>
              eò inclinet, vnde motus orbis neceſſariò ſequitur; vt facilè etiam ſine
                <lb/>
              figura quivis intelligat? </s>
            </p>
            <p type="main">
              <s id="s.000534">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.000535"> Nonnihil tamen figuræ adhibeo, vt maximam difficultatem,
                <lb/>
              quam ego quidem ſentio, in eo, quod dicis, mihi excutias. </s>
            </p>
            <figure id="id.025.01.052.1.jpg" xlink:href="025/01/052/1.jpg" number="14"/>
            <p type="main">
              <s id="s.000536">Sit planum inclinatum DH, & in eo
                <lb/>
              globus gravis, tangens planum in D, per­
                <lb/>
              pendicularis AF, à centro globi ducta;
                <lb/>
              ſintque aliæ duæ lineæ BAG, CI, plano
                <lb/>
              parallelæ, deſcendit globus A, vt dixi,
                <lb/>
              non quidem primo modo, ita vt punctum
                <lb/>
              C ſequatur lineam CI, & punctum D
                <lb/>
              lineam DH. </s>
              <s id="s.000537">Sed per rotationem, vt
                <lb/>
              aiunt, ita vt circa centrum A, aliæ par­
                <lb/>
              tes moveantur, quia, inquis, centrum
                <lb/>
              globi A eſt extra perpendiculum; de quo amabò perpendiculo intelligis
                <gap/>
                <lb/>
              an de BD ducto à puncto contactus, an verò de AF. </s>
            </p>
            <p type="main">
              <s id="s.000538">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.000539"> Vtrumque intelligo; vt enim globus ſuſtineatur in plano
                <lb/>
              DH, perpendiculum, quod ducitur a puncto contactus B, per centrum
                <lb/>
              A ite deberet; vnde certè planum eſſet horizonti parallelum; quando
                <lb/>
              verò vnum perpendiculum cum alio non concurrit, vt in hoc caſu,
                <lb/>
              tunc planum eſt inclinatum; igitur cùm centrum A per lineam perpendi­
                <lb/>
              cularem AE non ſuſtineatur à plano, vlteriùs enim ad F pertingit, deſcen­
                <lb/>
              dat neceſſe eſt, cùm deſcendere poſſit; in aliis omnibus corporibus, per­
                <lb/>
              fectam analogiam habes. </s>
              <s id="s.000540">Sit enim planum horizontale CN, & in eo
                <lb/>
                <figure id="id.025.01.052.2.jpg" xlink:href="025/01/052/2.jpg" number="15"/>
                <lb/>
              rectangulum CB, cuius centrum gravitatis F, ita
                <lb/>
              inclinetur rectangulum CB, donec perveniat ad
                <lb/>
              ſitum DI, exiſtente centro gravitatis in H, ac
                <lb/>
              proinde cùm perpendiculam HL cadat extrà
                <lb/>
              punctum contactus D, deorſum tendit, & to­
                <lb/>
              tum rectangulum ruit. </s>
              <s id="s.000541">Idem prorsùs de globo
                <lb/>
              dicendum eſt. </s>
            </p>
            <p type="main">
              <s id="s.000542">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.000543"> Crede mihi, Auguſtine, multi ſæpè
                <lb/>
              ac ſæpiùs paralogiſmis, & falſis præoccupatio-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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