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

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              <pb o="27" file="0059" n="60" rhead="MATHEMATICA. LIB. I. CAP. VIII."/>
            coreaceis cerâ & </s>
            <s xml:id="echoid-s1424" xml:space="preserve">oleo imbutis impletur, quæ comprimuntur
              <lb/>
            operculo q(Q) ita, ut quam exactiſſime cum filo æneo, quod
              <lb/>
            hæc pertranſit, congruant.</s>
            <s xml:id="echoid-s1425" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div195" type="section" level="1" n="69">
          <head xml:id="echoid-head115" xml:space="preserve">
            <emph style="sc">Experimentum</emph>
          </head>
          <p>
            <s xml:id="echoid-s1426" xml:space="preserve">Omnibus ut explicatum dispoſitis, antequam operculum
              <lb/>
              <note position="right" xlink:label="note-0059-01" xlink:href="note-0059-01a" xml:space="preserve">120.</note>
            o, cum adjunctis, vitro ſuperiori imponatur, fruſtum au-
              <lb/>
            ri cum plumulâ ita diſponenda ſunt, ut hæreant inter ex-
              <lb/>
            trema laminæ i, ibique elaſticitate firmiter retineantur.</s>
            <s xml:id="echoid-s1427" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1428" xml:space="preserve">Impoſito tunc operculo, cerâ aëris ingreſſus inter hoc & </s>
            <s xml:id="echoid-s1429" xml:space="preserve">
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            vitrum, ut ſuperius dictum, cohibeatur; </s>
            <s xml:id="echoid-s1430" xml:space="preserve">agitatâ antliâ ex-
              <lb/>
            hauriatur aër ex vitris.</s>
            <s xml:id="echoid-s1431" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1432" xml:space="preserve">Si nunc manubrium m circumvolvatur; </s>
            <s xml:id="echoid-s1433" xml:space="preserve">clarum eſt eodem
              <lb/>
            momento aurum & </s>
            <s xml:id="echoid-s1434" xml:space="preserve">plumulam relaxari, & </s>
            <s xml:id="echoid-s1435" xml:space="preserve">dimitti, exactiſſi-
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            me etiam eodem momento ad laminam L pervenient.</s>
            <s xml:id="echoid-s1436" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1437" xml:space="preserve">Corpora cadentia percipiet ſpectator ad talem diſtan-
              <lb/>
            tiam poſitus, ut unico intuitu omnia percipiat vitra, ſi ad
              <lb/>
            minorem detur diſtantiam oculos dirigat ad ipſam lami-
              <lb/>
            nam L.</s>
            <s xml:id="echoid-s1438" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1439" xml:space="preserve">Ex alio etiam Experimento, in ſequentibus memorando,
              <lb/>
            idem hocce Phænomenon deducitur.</s>
            <s xml:id="echoid-s1440" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s1441" xml:space="preserve">Ex hiſce ſequitur, gravitate obſtacula quæcunque per æqua-
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            lia ſpatia æqualibus temporibus transferri, ex actione imme-
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            diata gravitatis; </s>
            <s xml:id="echoid-s1442" xml:space="preserve">patet enim corpora in primo momento eo-
              <lb/>
            dem modo moveri, & </s>
            <s xml:id="echoid-s1443" xml:space="preserve">ſingulis momentis ſequentibus corpus
              <lb/>
            utrumque eodem modo accelerari; </s>
            <s xml:id="echoid-s1444" xml:space="preserve">ſunt ergo actiones gra-
              <lb/>
              <note symbol="*" position="right" xlink:label="note-0059-02" xlink:href="note-0059-02a" xml:space="preserve">106.</note>
            vitatis in corpora ut ipſa corpora , id eſt pondera ſunt
              <note position="right" xlink:label="note-0059-03" xlink:href="note-0059-03a" xml:space="preserve">121.</note>
            quantitates materiæ; </s>
            <s xml:id="echoid-s1445" xml:space="preserve">ſingulæque materiæ particulæ æqua-
              <lb/>
            les æqualiter ponderant, cujuſcunque corporis particulæ
              <lb/>
            fuerint.</s>
            <s xml:id="echoid-s1446" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1447" xml:space="preserve">Quando pondus conſideratur ut potentia, intenſitas po-
              <lb/>
              <note position="right" xlink:label="note-0059-04" xlink:href="note-0059-04a" xml:space="preserve">122.</note>
            tentiæ proportionalis eſt quantitati materiæ in corpore pon-
              <lb/>
            deranti, & </s>
            <s xml:id="echoid-s1448" xml:space="preserve">potentiæ directio eſt verſus Terræ centrum.</s>
            <s xml:id="echoid-s1449" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1450" xml:space="preserve">Hæc de gravitate notanda erant, quia ponderibus in Ex-
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            perimentis circa preſſiones inſtituendis utimur.</s>
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