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

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            <s xml:id="echoid-s10833" xml:space="preserve">
              <pb o="297" file="0401" n="438" rhead="MATHEMATICA. LIB. II. CAP XIII."/>
            enim corpore hanc obtegi quod grave eſt, cujus partes im-
              <lb/>
            preſſioni cuicunque cedunt, & </s>
            <s xml:id="echoid-s10834" xml:space="preserve">facillime moventur inter
              <lb/>
            ſe, quod premit pro altitudine ſua, & </s>
            <s xml:id="echoid-s10835" xml:space="preserve">cujus preſſio omnes
              <lb/>
            partes verſus eſt æqualis.</s>
            <s xml:id="echoid-s10836" xml:space="preserve"/>
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        </div>
        <div xml:id="echoid-div1540" type="section" level="1" n="365">
          <head xml:id="echoid-head503" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          1.</head>
          <p style="it">
            <s xml:id="echoid-s10837" xml:space="preserve">Omnis aër, quo Terra circumdatur, ſimul conſideratus,
              <lb/>
              <note position="right" xlink:label="note-0401-01" xlink:href="note-0401-01a" xml:space="preserve">1051</note>
            vocatur Telluris Atmoſphæra, aut ſimpliciter Atmoſphæra.</s>
            <s xml:id="echoid-s10838" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div1542" type="section" level="1" n="366">
          <head xml:id="echoid-head504" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          2.</head>
          <p style="it">
            <s xml:id="echoid-s10839" xml:space="preserve">Aëris altitudo ſupra Terræ ſuperficiem vocatur Atmoſphæ-
              <lb/>
              <note position="right" xlink:label="note-0401-02" xlink:href="note-0401-02a" xml:space="preserve">1052.</note>
            ræ altitudo.</s>
            <s xml:id="echoid-s10840" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s10841" xml:space="preserve">Ubique in Telluris ſuperficie corpus dari, quamvis ipſius
              <lb/>
              <note position="right" xlink:label="note-0401-03" xlink:href="note-0401-03a" xml:space="preserve">1053.</note>
            partes plerumque viſum fugiant, experimento con
              <lb/>
            ſtat .</s>
            <s xml:id="echoid-s10842" xml:space="preserve"/>
          </p>
          <note symbol="*" position="right" xml:space="preserve">27</note>
          <p>
            <s xml:id="echoid-s10843" xml:space="preserve">Hoc impreſſioni cuicunque cedere, & </s>
            <s xml:id="echoid-s10844" xml:space="preserve">ipſius partes facile
              <lb/>
              <note position="right" xlink:label="note-0401-05" xlink:href="note-0401-05a" xml:space="preserve">1054.</note>
            moveri, a nemine in dubium vocari poteſt.</s>
            <s xml:id="echoid-s10845" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s10846" xml:space="preserve">Grave eſſe probatur, quia in ceterorum fluidorum ſu-
              <lb/>
              <note position="right" xlink:label="note-0401-06" xlink:href="note-0401-06a" xml:space="preserve">1055.</note>
            perficies premit, hæcque in tubis ſuſtinet.</s>
            <s xml:id="echoid-s10847" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div1547" type="section" level="1" n="367">
          <head xml:id="echoid-head505" xml:space="preserve">
            <emph style="sc">Experimentum</emph>
          1.</head>
          <p>
            <s xml:id="echoid-s10848" xml:space="preserve">Detur tubus vitreus AB, longitudinis circiter trium
              <lb/>
              <note position="right" xlink:label="note-0401-07" xlink:href="note-0401-07a" xml:space="preserve">1056.</note>
            pedum, & </s>
            <s xml:id="echoid-s10849" xml:space="preserve">cujus cavitatis diameter ſit quartæ partis unius
              <lb/>
              <note position="right" xlink:label="note-0401-08" xlink:href="note-0401-08a" xml:space="preserve">TAB XXXVIII.
                <lb/>
              fig. 2.</note>
            pollicis; </s>
            <s xml:id="echoid-s10850" xml:space="preserve">ſi extremitas A obturetur, & </s>
            <s xml:id="echoid-s10851" xml:space="preserve">tubus mercurio re-
              <lb/>
            pleatur, alteraque extremitas vaſe V mercurium continenti
              <lb/>
            immergatur, mercurius ſuſtinebitur ad altitudinem circi-
              <lb/>
            ter viginti novem pollicum. </s>
            <s xml:id="echoid-s10852" xml:space="preserve">Oritur hoc ex aëris preſſio-
              <lb/>
            ne in ſuperficiem mercurii in vaſe, quæ ubique æqualiter
              <lb/>
            premi non poteſt, niſi in tubo, cui aër nullus ineſt, mercu-
              <lb/>
            rii columna detur, quæ æqualiter cum aëre exteriori pre-
              <lb/>
            mat . </s>
            <s xml:id="echoid-s10853" xml:space="preserve">Tubus hic Torricellianus dicitur; </s>
            <s xml:id="echoid-s10854" xml:space="preserve">a primo qui
              <note symbol="*" position="right" xlink:label="note-0401-09" xlink:href="note-0401-09a" xml:space="preserve">709.</note>
            exp. </s>
            <s xml:id="echoid-s10855" xml:space="preserve">demonſtravit Torricelli.</s>
            <s xml:id="echoid-s10856" xml:space="preserve"/>
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        </div>
        <div xml:id="echoid-div1549" type="section" level="1" n="368">
          <head xml:id="echoid-head506" xml:space="preserve">
            <emph style="sc">Experimentum</emph>
          2.</head>
          <p>
            <s xml:id="echoid-s10857" xml:space="preserve">Ne mutetur hæc preſſio, quando tubus inclinatur, re-
              <lb/>
              <note position="right" xlink:label="note-0401-10" xlink:href="note-0401-10a" xml:space="preserve">1057.</note>
            quiritur, ut eandem mercurius ſervet altitudinem vertica-
              <lb/>
              <note position="right" xlink:label="note-0401-11" xlink:href="note-0401-11a" xml:space="preserve">TAB. XXXVIII.
                <lb/>
              fig. 1.</note>
            lem ; </s>
            <s xml:id="echoid-s10858" xml:space="preserve">ideò ſi dentur duo vaſa, hydrargyrum
              <note symbol="*" position="right" xlink:label="note-0401-12" xlink:href="note-0401-12a" xml:space="preserve">715.</note>
            in quibus tubi, ut dictum, immerguntur, quorum ED
              <lb/>
            ad horizontem inclinatur, ſuſtinetur mercurius ad </s>
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