Varro, Michael, De motv tractatvs

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="044/01/049.jpg" pagenum="41"/>
              cylindri longitudo: illa verò qua mouere volumus,
                <lb/>
              in orbem moueatur, aut ſi eius nutus linea recta ſit,
                <lb/>
              circa cylindrum fluens illum moueat contingendo. </s>
            </p>
            <p type="main">
              <s>Et hæc quidem de mediis in ſuo genere
                <expan abbr="conſiſtẽ-tibus">conſiſten­
                  <lb/>
                tibus</expan>
              . </s>
              <s>Poſſunt autem fieri eorum Syzygiæ vectis ſci­
                <lb/>
              licet cum trochleis, helicis cum vecte, aut cum tro­
                <lb/>
              chleis, aut
                <expan abbr="omniũ">omnium</expan>
              ſimul. </s>
              <s>Vectis cum trochleis ſi fu­
                <lb/>
              nis illud extremum, quod mouetur in trochleis, er­
                <lb/>
              gatis aut ſuculis inuoluatur: helix cum vecte
                <expan abbr="coniũ-getur">coniun­
                  <lb/>
                getur</expan>
              , ſi tympanus circum axem moueatur, ſitque i­
                <lb/>
              ta denticulatus, vt dentes ipſius helicem in cylindro
                <lb/>
              excauatam ingrediantur, quam machinam helicem
                <lb/>
              perpetuam vulgò vocant, eò quòd eius conuerſio
                <lb/>
              perpetua eſſe poſſit, cum helicis ſimplicis operatio
                <lb/>
              non excedat ipſius longitudinem. </s>
              <s>Quorum
                <expan abbr="omniũ">omnium</expan>
                <lb/>
              tum inter ſe, tum ad ſubiecta mouenda accommo­
                <lb/>
              datio adeò varia eſt, vt ſcripto
                <expan abbr="cõprehẽdi">comprehendi</expan>
              vix poſſit.
                <lb/>
              </s>
              <s>Ex his autem quæ dicta ſunt, mediocris ingenij me­
                <lb/>
              chanicus poterit ea prout ipſi neceſſe erit aptare. </s>
              <s>In
                <lb/>
              machinis autem omnibus hæc cautio
                <expan abbr="adhibẽda">adhibenda</expan>
              eſt,
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              vt earum ſtructura firma ſit, præſertim verò vbi cir­
                <lb/>
              cum axes aliquas fit motus, deinde vt vincula, qui­
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              bus illis vires
                <expan abbr="affingũtur">affinguntur</expan>
              , valida ſint, illarum enim o­
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              mnium vis in ſuo ſtatu manendi vtrique vi aptandæ
                <lb/>
              æqualis eſſe debet: aget enim in illas vis
                <expan abbr="vtraq;">vtraque</expan>
              , quòd
                <lb/>
              ſi medium firmum non ſit, motus in ipſa machina </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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