Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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          <chap id="N10019">
            <p id="N11F01" type="main">
              <s id="N11F07">
                <pb pagenum="64" xlink:href="005/01/072.jpg"/>
              & Cochleæ fœmina vulgò appellatur. </s>
              <s id="N11F1B">Nam ad conuerſio­
                <lb/>
              nem manubrij totiuſque cylindri ſuper proprium axem,
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              mouebitur etiam ipſum Tylum CD. </s>
              <s id="N11F23">Quæ omnia fusè Gui­
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              dus Vbaldus demonſtrat. </s>
              <s id="N11F28">Ex cuius doctrina illud tandem
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              hic relinquitur adnotandum, ac ſimul in propoſito conclu­
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              dendum, Cochleæ helices, aliud non eſſe, quàm latus
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              cunei circa idem cylindrum iterum atque iterum circumuo­
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              lutum. </s>
              <s id="N11F33">Vnde apparet quomodo etiam cochlea reducatur
                <lb/>
              ad vectem; nimirum eodem prorſus pacto, quo cuneus, vt
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              latius ipſe proſequitur. </s>
            </p>
            <p id="N11F3A" type="head">
              <s id="N11F3C">
                <emph type="italics"/>
              De Centro grauitatis
                <expan abbr="naturaliq.">naturalique</expan>
              mobilitate
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              grauium, & leuium.
                <emph.end type="italics"/>
              </s>
            </p>
            <p id="N11F49" type="head">
              <s id="N11F4B">ADDITIO SECVNDA.</s>
            </p>
            <p id="N11F4F" type="main">
              <s id="N11F51">Poſt conſiderationem inſtrumentorum, ac machinarum
                <lb/>
              circuli naturam participantium, vt aptam ac debitam
                <lb/>
              eorum applicationem ad motum
                <expan abbr="grauiũ">grauium</expan>
              , & leuium cogno­
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              ſcamus, conſideranda nobis erit mobilitas ipſa tàm natu­
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              ralis, quàm præternaturalis, & artificioſa illorum, cui ada­
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              ptari debent inſtrumenta, & ad quam ex inſtituto ordinan­
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              tur. </s>
              <s id="N11F64">Cumque naturalis mobilitas grauium ſit penes cen­
                <lb/>
              trum grauitatis illorum, aliquid primò dicendum occurrit
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              de centro grauitatis in communi, vt quàm breuiſſimè quæ
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              neceſſaria ſunt ad intelligentiam præfatæ motionis expe­
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              diantur. </s>
            </p>
            <p id="N11F6F" type="main">
              <s id="N11F71">
                <arrow.to.target n="marg14"/>
              Centrum igitur grauitatis vniuſcuiuſque corporis iuxta
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              doctrinam Heronis, ac Pappi Alexandrini, eſt punctum il­
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              lud intra poſitum, à quo ſi ipſum corpus graue ſuſpendatur,
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              vel etiam ſuſpenſum feratur,
                <expan abbr="eãdem">eandem</expan>
              ſemper ſuarum partium
                <lb/>
              ſeruat poſitionem quippe quæ in ipſa ſuſpenſione, aut latio­
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              ne corporis minimè circumuertuntur, cum vndique ſint
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              æqualium momentorum. </s>
              <s id="N11F87">Quod præclarè explicat Federi­
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              cus Commandinus. </s>
              <s id="N11F8C">Si enim, inquit, per tale centrum du-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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