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

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        <div xml:id="echoid-div395" type="section" level="1" n="136">
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              <pb o="57" file="0105" n="114" rhead="MATHEMATICA. LIB. I. CAP. XVI."/>
            perimenti ex ſæpius memoraton. </s>
            <s xml:id="echoid-s2501" xml:space="preserve">220. </s>
            <s xml:id="echoid-s2502" xml:space="preserve">deducitur; </s>
            <s xml:id="echoid-s2503" xml:space="preserve">ad quem
              <lb/>
            omnes alii caſus potentiarum obliquarum, quæ excogitari
              <lb/>
            poſſunt, etiam pertient.</s>
            <s xml:id="echoid-s2504" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div399" type="section" level="1" n="137">
          <head xml:id="echoid-head195" style="it" xml:space="preserve">LIBRI I. PARS III.</head>
          <head xml:id="echoid-head196" xml:space="preserve">De Motibus, Potentiarum actionibus,
            <lb/>
          variatis.</head>
          <head xml:id="echoid-head197" xml:space="preserve">CAPUT XVI.</head>
          <head xml:id="echoid-head198" style="it" xml:space="preserve">De Naturæ legibus Newtonianis.</head>
          <p>
            <s xml:id="echoid-s2505" xml:space="preserve">Preſſiones contrariis preſſionibus deſtructas, & </s>
            <s xml:id="echoid-s2506" xml:space="preserve">obſtacu-
              <lb/>
            la immediatâ potentiæ actione translata, huc uſque
              <lb/>
            conſideravimus. </s>
            <s xml:id="echoid-s2507" xml:space="preserve">Nunc preſſiones in corpora ſibi per-
              <lb/>
            miſſa & </s>
            <s xml:id="echoid-s2508" xml:space="preserve">in motu perſeverantia, agentes examinabimus;
              <lb/>
            </s>
            <s xml:id="echoid-s2509" xml:space="preserve">hìc ut in omnibus Phyſicis ex Phænomenis ratiocinandum eſt,
              <lb/>
            & </s>
            <s xml:id="echoid-s2510" xml:space="preserve">ex iis naturæ leges deduci debent.</s>
            <s xml:id="echoid-s2511" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2512" xml:space="preserve">Tres a Newtono traduntur, quibus omnia, quæ ad mo-
              <lb/>
            tum pertinent, explicari poſſe credimus.</s>
            <s xml:id="echoid-s2513" xml:space="preserve"/>
          </p>
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        <div xml:id="echoid-div400" type="section" level="1" n="138">
          <head xml:id="echoid-head199" xml:space="preserve">
            <emph style="sc">Lex</emph>
          I.</head>
          <p style="it">
            <s xml:id="echoid-s2514" xml:space="preserve">Corpus omne perſeverat in ſtatu ſuo quieſcendi vel mo-
              <lb/>
              <note position="right" xlink:label="note-0105-01" xlink:href="note-0105-01a" xml:space="preserve">243.</note>
            vendi uniformiter in directum, niſi quatenus a viribus im-
              <lb/>
            preſſis cogitur ſtatum illum mutare.</s>
            <s xml:id="echoid-s2515" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2516" xml:space="preserve">Videmus Corpus ſuâ naturâ eſſe iners & </s>
            <s xml:id="echoid-s2517" xml:space="preserve">incapax ſeſe mo-
              <lb/>
            vendi, unde niſi cauſâ extraneâ moveatur, in quiete ſem-
              <lb/>
            per neceſſario manet.</s>
            <s xml:id="echoid-s2518" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2519" xml:space="preserve">Corpus etiam ſemel motum in motu ſecundum eandem
              <lb/>
            rectam lineam eadem cum velocitate continuare quotidia-
              <lb/>
            nis Experimentis pleniſhme conſtat; </s>
            <s xml:id="echoid-s2520" xml:space="preserve">nullam enim unquam
              <lb/>
            mutationem in motu fieri videmus niſi aliqua ex cauſa.</s>
            <s xml:id="echoid-s2521" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2522" xml:space="preserve">Corpus vi inſitâ transfertur, & </s>
            <s xml:id="echoid-s2523" xml:space="preserve">vis hæc, ut ex lege hac
              <lb/>
              <note position="right" xlink:label="note-0105-02" xlink:href="note-0105-02a" xml:space="preserve">244.</note>
            ſequitur, non mutatur niſi actione cauſæ extraneæ,</s>
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        <div xml:id="echoid-div403" type="section" level="1" n="139">
          <head xml:id="echoid-head200" xml:space="preserve">
            <emph style="sc">Lex</emph>
          II.</head>
          <p style="it">
            <s xml:id="echoid-s2524" xml:space="preserve">Mutatio motus eſt ſemper proportionalis vi motrici impreſ-
              <lb/>
              <note position="right" xlink:label="note-0105-03" xlink:href="note-0105-03a" xml:space="preserve">245.</note>
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