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

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            <s xml:id="echoid-s12851" xml:space="preserve">
              <pb o="15" file="0499" n="547" rhead="MATHEMATICA LIB. III. CAP. IV."/>
            certum eſt, id eſt ignotum eſt quænam relatio detur inter
              <lb/>
            mutationem in expanſione & </s>
            <s xml:id="echoid-s12852" xml:space="preserve">mutationem in calore; </s>
            <s xml:id="echoid-s12853" xml:space="preserve">ut ex
              <lb/>
            comparatis dilatationibus gradus caloris poſſint conferri in-
              <lb/>
            ter ſe.</s>
            <s xml:id="echoid-s12854" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s12855" xml:space="preserve">Si ſubito incaleſcat globus G aut cylindrus C, ſtatim li-
              <lb/>
              <note position="right" xlink:label="note-0499-01" xlink:href="note-0499-01a" xml:space="preserve">600.</note>
            quidum in tubo deſcendit, ſed immediate poſt aſcendit.
              <lb/>
            </s>
            <s xml:id="echoid-s12856" xml:space="preserve">Ex calore ſubito citius vitrum ipſum incaleſcit quam liqui-
              <lb/>
            dum in vitro contentum; </s>
            <s xml:id="echoid-s12857" xml:space="preserve">ideo dilatato ex calore vitro, & </s>
            <s xml:id="echoid-s12858" xml:space="preserve">
              <lb/>
            eo auctâ hujus capacitate, deſcendit liquidum, ſed imme-
              <lb/>
            diate poſt calor liquido communicatur, quod ideo aſcendit.</s>
            <s xml:id="echoid-s12859" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s12860" xml:space="preserve">Ex corporum expanſione patet particulas, ex quibus cor-
              <lb/>
              <note position="right" xlink:label="note-0499-02" xlink:href="note-0499-02a" xml:space="preserve">601.</note>
            pora conſtant, ex actione ignis acquirere vim repellentem
              <lb/>
            qua a ſe mutuo recedere conantur, & </s>
            <s xml:id="echoid-s12861" xml:space="preserve">quæ cum vi qua par-
              <lb/>
            ticulæ ſe ſe mutuo petunt contrarie agit. </s>
            <s xml:id="echoid-s12862" xml:space="preserve">Quamdiu hæc
              <note symbol="*" position="right" xlink:label="note-0499-03" xlink:href="note-0499-03a" xml:space="preserve">31.</note>
            illam ſuperat particulæ cohœrent minus aut magis pro di-
              <lb/>
            verſo caloris gradu. </s>
            <s xml:id="echoid-s12863" xml:space="preserve">Quando vis repellens fere adæquat vim
              <lb/>
            attrahentem, particulæ antea intimè junctæ vix cohœrent, & </s>
            <s xml:id="echoid-s12864" xml:space="preserve">
              <lb/>
            inpreſſioni cuicunque cedunt & </s>
            <s xml:id="echoid-s12865" xml:space="preserve">facile moventur inter ſe;
              <lb/>
            </s>
            <s xml:id="echoid-s12866" xml:space="preserve">unde videmus corpus ſolidum calore in liquidum mutari,
              <lb/>
              <note position="right" xlink:label="note-0499-04" xlink:href="note-0499-04a" xml:space="preserve">602.</note>
            quod in omnibus corporibus quæ calore liquefiunt obſerva-
              <lb/>
            tur, imminuto vero calore ad priſtinum ſtatum redeunt.
              <lb/>
            </s>
            <s xml:id="echoid-s12867" xml:space="preserve">Quæritur an non fluiditas omnis a calore pendeat? </s>
            <s xml:id="echoid-s12868" xml:space="preserve">quod de-
              <lb/>
              <note position="right" xlink:label="note-0499-05" xlink:href="note-0499-05a" xml:space="preserve">603.</note>
            terminari non poteſt, quia corpus omnino igne deſtitutum
              <lb/>
            nullum novimus; </s>
            <s xml:id="echoid-s12869" xml:space="preserve">illud certum eſt calorem non modo cauſam
              <lb/>
            eſſe fluiditatis in metallis, cerâ & </s>
            <s xml:id="echoid-s12870" xml:space="preserve">ſimilibus corporibus lique-
              <lb/>
            factis, ſed multa corpora, quæ vulgo inter fluida referuntur, a
              <lb/>
            calore ſolo fluere; </s>
            <s xml:id="echoid-s12871" xml:space="preserve">ſic aqua eſt glacies liquefacta, ſublato
              <lb/>
              <note position="right" xlink:label="note-0499-06" xlink:href="note-0499-06a" xml:space="preserve">604.</note>
            enim proparte aquæ calore coaleſcit.</s>
            <s xml:id="echoid-s12872" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s12873" xml:space="preserve">Calor ita poteſt adaugeri, ut in quibuſdam corporibus tota
              <lb/>
              <note position="right" xlink:label="note-0499-07" xlink:href="note-0499-07a" xml:space="preserve">605.</note>
            vis attrahens ſuperetur a vi repellente, in quo caſu particu-
              <lb/>
            læ ſeſe mutuo fugiunt; </s>
            <s xml:id="echoid-s12874" xml:space="preserve">id eſt vim elaſticam acquirunt, quæ
              <lb/>
            ſimilis eſt illi qua particulæ aëris gaudent , quæ etiam
              <note symbol="*" position="right" xlink:label="note-0499-08" xlink:href="note-0499-08a" xml:space="preserve">431.</note>
            aëre calore augetur; </s>
            <s xml:id="echoid-s12875" xml:space="preserve">effectum hunc obſervamus in fumo & </s>
            <s xml:id="echoid-s12876" xml:space="preserve">
              <lb/>
            vaporibus.</s>
            <s xml:id="echoid-s12877" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div1894" type="section" level="1" n="464">
          <head xml:id="echoid-head624" xml:space="preserve">
            <emph style="sc">Experimentum</emph>
          3.</head>
          <p>
            <s xml:id="echoid-s12878" xml:space="preserve">Detur globus cavus æneus E, diametri circiter quatuor
              <lb/>
              <note position="right" xlink:label="note-0499-09" xlink:href="note-0499-09a" xml:space="preserve">TAB. III.
                <lb/>
              fig. 2.</note>
            pollicum, cum manubrio M; </s>
            <s xml:id="echoid-s12879" xml:space="preserve">cum globo jungitur tubus </s>
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