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

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          <pb o="309" file="0415" n="453" rhead="MATHEMATICA. LIB. II. CAP. XVI."/>
        </div>
        <div xml:id="echoid-div1599" type="section" level="1" n="380">
          <head xml:id="echoid-head519" xml:space="preserve">CAPUT XVI.</head>
          <head xml:id="echoid-head520" style="it" xml:space="preserve">De Antlia Pneumatica.</head>
          <p>
            <s xml:id="echoid-s11151" xml:space="preserve">AEris elaſticitas fundamentum eſt conſtructionis Machi-
              <lb/>
              <note position="right" xlink:label="note-0415-01" xlink:href="note-0415-01a" xml:space="preserve">1093.</note>
            næ, qua aër ex vaſe exhauritur. </s>
            <s xml:id="echoid-s11152" xml:space="preserve">Antlia Pneumati-
              <lb/>
            ca vocatur, quæ variis modis conſtruitur.</s>
            <s xml:id="echoid-s11153" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s11154" xml:space="preserve">In omnibus pars præcipua eſt cylindrus metallicus cavus, ab
              <lb/>
            interiori parte politus; </s>
            <s xml:id="echoid-s11155" xml:space="preserve">in hoc movetur embolus, exactiſſime
              <lb/>
            cum cylindri ſuperficie interiori congruens; </s>
            <s xml:id="echoid-s11156" xml:space="preserve">ne aëri tranſitus
              <lb/>
            ad latera detur. </s>
            <s xml:id="echoid-s11157" xml:space="preserve">Fundo cylindri embolus applicatur, deinde
              <lb/>
            elevatur, quo ex cylindri cavitate aër omnis excluditur. </s>
            <s xml:id="echoid-s11158" xml:space="preserve">Si
              <lb/>
            cum vaſe quocunque, per tubum in fundo cylindri, cavi-
              <lb/>
            tas hæc communicationem habeat, aër in vaſe ſeſe expan-
              <lb/>
            det, & </s>
            <s xml:id="echoid-s11159" xml:space="preserve">pro parte cylindrum intrabit, donec in cylindro & </s>
            <s xml:id="echoid-s11160" xml:space="preserve">
              <lb/>
            vaſe eandem habeat denſitatem. </s>
            <s xml:id="echoid-s11161" xml:space="preserve">Claudatur communicatio
              <lb/>
            inter vas & </s>
            <s xml:id="echoid-s11162" xml:space="preserve">cylindrum, aërque ex cylindro ejiciatur, & </s>
            <s xml:id="echoid-s11163" xml:space="preserve">
              <lb/>
            embolus fundo applicetur. </s>
            <s xml:id="echoid-s11164" xml:space="preserve">Si ſecunda vice embolus ele-
              <lb/>
            vetur, reſeratâ communicatione inter cylindrum & </s>
            <s xml:id="echoid-s11165" xml:space="preserve">vas me-
              <lb/>
            moratum, iterum aëris denſitas in vaſe minuetur; </s>
            <s xml:id="echoid-s11166" xml:space="preserve">& </s>
            <s xml:id="echoid-s11167" xml:space="preserve">repe-
              <lb/>
            tito emboli motu tandem aër in vaſe ad denſitatem mini-
              <lb/>
            mam reducetur. </s>
            <s xml:id="echoid-s11168" xml:space="preserve">aër tamen omnis hac methodo nunquam
              <lb/>
            exhauriri poteſt; </s>
            <s xml:id="echoid-s11169" xml:space="preserve">ſingulis enim vicibus aër ſeſe ita expandit,
              <lb/>
            ut eandem in cylindro denſitatem habeat ac in vaſe, in quo
              <lb/>
            ideò ſemper aër quidam ſupereſt.</s>
            <s xml:id="echoid-s11170" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s11171" xml:space="preserve">Antliæ omnes prædicta communia habent, in multis ta-
              <lb/>
              <note position="right" xlink:label="note-0415-02" xlink:href="note-0415-02a" xml:space="preserve">1094.</note>
            men differunt. </s>
            <s xml:id="echoid-s11172" xml:space="preserve">1. </s>
            <s xml:id="echoid-s11173" xml:space="preserve">Variis modis clauditur & </s>
            <s xml:id="echoid-s11174" xml:space="preserve">reſeratur com-
              <lb/>
            municatio inter vas exhauriendum & </s>
            <s xml:id="echoid-s11175" xml:space="preserve">cylindrum. </s>
            <s xml:id="echoid-s11176" xml:space="preserve">2. </s>
            <s xml:id="echoid-s11177" xml:space="preserve">Variæ
              <lb/>
            dantur methodi, quibus aër ex cylindro expellitur, quan-
              <lb/>
            do embolus fundo admovetur. </s>
            <s xml:id="echoid-s11178" xml:space="preserve">3. </s>
            <s xml:id="echoid-s11179" xml:space="preserve">Emboli in variis antliis
              <lb/>
            differunt. </s>
            <s xml:id="echoid-s11180" xml:space="preserve">4. </s>
            <s xml:id="echoid-s11181" xml:space="preserve">Situs cylindri non in omnibus eſt idem. </s>
            <s xml:id="echoid-s11182" xml:space="preserve">5. </s>
            <s xml:id="echoid-s11183" xml:space="preserve">Di-
              <lb/>
            verſæ adhibentur machinæ, quibus embolus agitatur.
              <lb/>
            </s>
            <s xml:id="echoid-s11184" xml:space="preserve">6. </s>
            <s xml:id="echoid-s11185" xml:space="preserve">Tandem duo ſæpe junguntur cylindri, in quorum uno
              <lb/>
            embolus elevatur, dum in alio deprimitur.</s>
            <s xml:id="echoid-s11186" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s11187" xml:space="preserve">Antlia noſtra hic delineatur; </s>
            <s xml:id="echoid-s11188" xml:space="preserve">pars oppoſita thecæ, non
              <lb/>
              <note position="right" xlink:label="note-0415-03" xlink:href="note-0415-03a" xml:space="preserve">TAB. XXXIX.
                <lb/>
              fig. 1.</note>
            </s>
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