Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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          <chap id="N10019">
            <p id="N112BC" type="main">
              <s id="N112E1">
                <pb pagenum="36" xlink:href="005/01/044.jpg"/>
              gnum: ita quælibet linea curua, ſeu conuexa antequam fiat
                <lb/>
              concaua, prius debet fieri recta: abſurdum igitur apparet, ean­
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              dem omnino circuli periferiam, ſimul conſtitui concauam,
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              & conuexam. </s>
            </p>
            <p id="N112F3" type="main">
              <s id="N112F5">Nec difficultatem euadunt, qui dicunt, concauum, & con­
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              uexum realiter non eſſe idem in circulo, ſeu curuitatem, &
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              concauitatem non reperiri in eadem linea, ſed in diuerſis, ità
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              vt in circunferentia ſit tantum curuitas, ſeù conuexum, con­
                <lb/>
              cauitas verò ſit potius in corpore extrinſeco ambiente per li­
                <lb/>
              neam illi correſpondentem. </s>
              <s id="N11302">Etenim cum linea corporis con­
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              tinentis ambiens circulum, penetretur in eodem ſpacio cum
                <lb/>
              circunferentia ipſius circuli,
                <expan abbr="conſidereturq.">conſidereturque</expan>
              ſola quantitas
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              abſtracta, & figura vtriuſque lineæ coincidentis, eadem ſem­
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              per difficultas obſtabit; nempè quo pacto fieri poſſit, vt
                <expan abbr="eadẽ">eadem</expan>
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              longitudo latitudinis expers, circulum terminans, ſeù circu­
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              lariter extenſa, ſimul ſit concaua, & conuexa. </s>
              <s id="N11319">Sed nihil pro­
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              hibet eandem circumferentiam indiuisibilem quoad latitudi­
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              nem, & profunditatem, ſimul eſſe concauam, & conuexam
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              reſpectu diuerſorum, vt in alijs etiam linearum figuris, ac ſu­
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              perficiebus poterit exemplificari: & vt eadem via dicitur
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              acliuis, & decliuis; idemque magnum, & paruum rei pectu di­
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              uerſorum, quæ cum illo comparantur. </s>
              <s id="N11328">Quo fit, vt admiran­
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              dam quidem eſſe huiuſmodi proprietatem circuli iure dica­
                <lb/>
              mus, nullam tamen in ſe
                <expan abbr="repugnantiã">repugnantiam</expan>
              inuoluere admittamus. </s>
            </p>
            <p id="N11333" type="head">
              <s id="N11335">
                <emph type="italics"/>
              De tertia Circuli proprietate.
                <emph.end type="italics"/>
              </s>
            </p>
            <p id="N1133C" type="head">
              <s id="N1133E">Textus Quintus.</s>
            </p>
            <p id="N11341" type="main">
              <s id="N11343">A
                <emph type="italics"/>
              ltervm autem, quod ſimul contrarijs
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              mouetur motionibus: ſimul enim ad anterio­
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              rem mouetur locum, & ad poſteriorem. </s>
              <s id="N1134D">Et
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              ea, quæ circulum deſcribit, linea eodem ſe
                <lb/>
              habet modo: Ex que enim incipit loco, illius
                <lb/>
              extremum, ad eundem rurſus redit: Illa
                <lb/>
              enim continuò commota, extremum rurſus efficitur primum.
                <emph.end type="italics"/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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