Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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        <div xml:id="echoid-div323" type="section" level="1" n="108">
          <p>
            <s xml:id="echoid-s1974" xml:space="preserve">
              <pb o="42" file="0084" n="90" rhead="PHYSICES ELEMENTA"/>
            ſuum funem peculiarem, ſi ita diſponantur, ut in hac figura,
              <lb/>
            multo magis actionem potentiæ augent. </s>
            <s xml:id="echoid-s1975" xml:space="preserve">Actio enim du-
              <lb/>
            plicatur pro unoquoque orbiculo, ita ut produobus ſit qua-
              <lb/>
            drupla, pro tribus octupla, & </s>
            <s xml:id="echoid-s1976" xml:space="preserve">ſic de cæteris.</s>
            <s xml:id="echoid-s1977" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1978" xml:space="preserve">Sæpius memorata regula, ſcilicet ſpatia percurſa à po-
              <lb/>
            tentia & </s>
            <s xml:id="echoid-s1979" xml:space="preserve">pondere, quando æquè pollent, eſſe inter ſe inver-
              <lb/>
            ſè, ut potentia ad pondus, in omnibus prædictis locum ha-
              <lb/>
            bet.</s>
            <s xml:id="echoid-s1980" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1981" xml:space="preserve">Hic ſemper ſunes paralleli ponuntur; </s>
            <s xml:id="echoid-s1982" xml:space="preserve">quid ſunium obli-
              <lb/>
            quitas diſcriminis adſerat, in ſequentibus videbimus.</s>
            <s xml:id="echoid-s1983" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div325" type="section" level="1" n="109">
          <head xml:id="echoid-head159" xml:space="preserve">CAPUT XIII.</head>
          <head xml:id="echoid-head160" style="it" xml:space="preserve">De Cuneo & Cocbleâ, Machinarum Simplicium quartâ, &
            <lb/>
          quintâ.</head>
          <p>
            <s xml:id="echoid-s1984" xml:space="preserve">Ex prædictis ſatis patet, quomodo ope parvæ potentiæ
              <lb/>
            pondus magnum ſuſtineri aut elevari poſſit;</s>
            <s xml:id="echoid-s1985" xml:space="preserve">ad hoſce uſus
              <lb/>
            non reſtringitur Ars Mechanica: </s>
            <s xml:id="echoid-s1986" xml:space="preserve">intenſitates potentiarum
              <lb/>
            in omni caſu augeri poſſunt; </s>
            <s xml:id="echoid-s1987" xml:space="preserve">exemplum pulcherrimum ſup-
              <lb/>
            peditat Cuneus, inſtrumentum findendo ligno, pluribuſque
              <lb/>
            aliis uſibus, inſerviens.</s>
            <s xml:id="echoid-s1988" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div326" type="section" level="1" n="110">
          <head xml:id="echoid-head161" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          I.</head>
          <p>
            <s xml:id="echoid-s1989" xml:space="preserve">Cuneus eſt priſma non admodum altum, cujus baſes ſunt
              <lb/>
              <note position="left" xlink:label="note-0084-01" xlink:href="note-0084-01a" xml:space="preserve">200.</note>
              <note position="left" xlink:label="note-0084-02" xlink:href="note-0084-02a" xml:space="preserve">TAB. VII.
                <lb/>
              fig. 6.</note>
            triangula æquicrura; </s>
            <s xml:id="echoid-s1990" xml:space="preserve">ut A.</s>
            <s xml:id="echoid-s1991" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div328" type="section" level="1" n="111">
          <head xml:id="echoid-head162" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          2.</head>
          <p style="it">
            <s xml:id="echoid-s1992" xml:space="preserve">Altitudo trianguli eſt cunei altitudo; </s>
            <s xml:id="echoid-s1993" xml:space="preserve">ut db.</s>
            <s xml:id="echoid-s1994" xml:space="preserve"/>
          </p>
          <note position="right" xml:space="preserve">201.</note>
        </div>
        <div xml:id="echoid-div329" type="section" level="1" n="112">
          <head xml:id="echoid-head163" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          3.</head>
          <p style="it">
            <s xml:id="echoid-s1995" xml:space="preserve">Trianguli baſis vocatur etiam cunei baſis; </s>
            <s xml:id="echoid-s1996" xml:space="preserve">ut ce.</s>
            <s xml:id="echoid-s1997" xml:space="preserve"/>
          </p>
          <note position="left" xml:space="preserve">202.</note>
        </div>
        <div xml:id="echoid-div330" type="section" level="1" n="113">
          <head xml:id="echoid-head164" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          4.</head>
          <p>
            <s xml:id="echoid-s1998" xml:space="preserve">Acies cunei eſt linea recta, quæ conjungit triangulorum
              <lb/>
              <note position="left" xlink:label="note-0084-05" xlink:href="note-0084-05a" xml:space="preserve">203.</note>
            vertices, ut bf.</s>
            <s xml:id="echoid-s1999" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2000" xml:space="preserve">Ligno findendo, aut corporibus ſeparandis, acies cunei
              <lb/>
            applicatur, & </s>
            <s xml:id="echoid-s2001" xml:space="preserve">ictibus mallei, loco preſſionis, cuneus intruditur.</s>
            <s xml:id="echoid-s2002" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2003" xml:space="preserve">Quando totus cuneus intruditur, ſpatium a puncto d, cui
              <lb/>
            ictus mallei applicantur, percurſum, eſt altitudo cunei d b,
              <lb/>
            quæ ideo proſpatio à potentia percurſo haberi debet; </s>
            <s xml:id="echoid-s2004" xml:space="preserve"/>
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