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

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              <pb o="90" file="0146" n="159" rhead="PHYSICES ELEMENTA"/>
            curvam deſcribat quæ in ſe redit, tempus elapſum inter re-
              <lb/>
            ceſſum a puncto & </s>
            <s xml:id="echoid-s3737" xml:space="preserve">acceſſum ad idem punctum: </s>
            <s xml:id="echoid-s3738" xml:space="preserve">ſi curva in
              <lb/>
            ſe non redeat, pro puncto linea per centrum tranſiens ſu-
              <lb/>
            menda eſt.</s>
            <s xml:id="echoid-s3739" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3740" xml:space="preserve">Tempus periodicum pendet a corporis celeritate, & </s>
            <s xml:id="echoid-s3741" xml:space="preserve">ideò
              <lb/>
            in comparandis viribus centralibus tempus hocce loco cele-
              <lb/>
            ritatis conſiderari poteſt.</s>
            <s xml:id="echoid-s3742" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3743" xml:space="preserve">Quando tempora periodica ſunt aqualia & </s>
            <s xml:id="echoid-s3744" xml:space="preserve">diſtantia æqua-
              <lb/>
              <note position="left" xlink:label="note-0146-01" xlink:href="note-0146-01a" xml:space="preserve">361.</note>
            les a centro, vires centrales ſunt ut quantitates materiæ in
              <lb/>
            corporibus quæ revolvuntur . </s>
            <s xml:id="echoid-s3745" xml:space="preserve">Temporibus enim
              <note symbol="*" position="left" xlink:label="note-0146-02" xlink:href="note-0146-02a" xml:space="preserve">106.</note>
            bus eodem modo viribus centralibus moventur.</s>
            <s xml:id="echoid-s3746" xml:space="preserve"/>
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        <div xml:id="echoid-div558" type="section" level="1" n="171">
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            <emph style="sc">Experimentum</emph>
          4.</head>
          <p>
            <s xml:id="echoid-s3747" xml:space="preserve">Applicatur Orbi A, rota omnium minima, ex tribus ro-
              <lb/>
              <note position="left" xlink:label="note-0146-03" xlink:href="note-0146-03a" xml:space="preserve">362.</note>
            tis ut b b, de quibus in deſcriptione Machinæ; </s>
            <s xml:id="echoid-s3748" xml:space="preserve">ita ut ſi am-
              <lb/>
              <note position="left" xlink:label="note-0146-04" xlink:href="note-0146-04a" xml:space="preserve">TAB XIV.
                <lb/>
              fig. 1.2.</note>
            bo Orbes A & </s>
            <s xml:id="echoid-s3749" xml:space="preserve">B ſimul agitentur motu rotæ Q in tempore
              <lb/>
            æquali circumvolvantur; </s>
            <s xml:id="echoid-s3750" xml:space="preserve">ſingulis applicantur pyxides oblon-
              <lb/>
            gæ P, P; </s>
            <s xml:id="echoid-s3751" xml:space="preserve">& </s>
            <s xml:id="echoid-s3752" xml:space="preserve">cylindri cum tubulis vitreis L, L, per
              <lb/>
            foramina in medio pyxidum, ſuſtentaculis Orbium inſerun-
              <lb/>
            tur.</s>
            <s xml:id="echoid-s3753" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3754" xml:space="preserve">Globus t ponderis ſemi-libræ pyxidi Orbis B imponitur,
              <lb/>
            & </s>
            <s xml:id="echoid-s3755" xml:space="preserve">globus t ponderis unius libræ pyxidi Orbis A; </s>
            <s xml:id="echoid-s3756" xml:space="preserve">filis per
              <lb/>
            tubulos L, L, tranſeuntibus & </s>
            <s xml:id="echoid-s3757" xml:space="preserve">cum ponderibus, in ſepa-
              <lb/>
            rationibus ſuſtentaculorum Orbium poſitis, cohærentibus,
              <lb/>
            globi annectuntur ita, ut diſtantiæ globorum a centro,
              <lb/>
            quando fila extenduntur, & </s>
            <s xml:id="echoid-s3758" xml:space="preserve">non elevantur pondera, ſint
              <lb/>
            æquales. </s>
            <s xml:id="echoid-s3759" xml:space="preserve">Inutraque pyxide Elaſterii s extremitas inſeritur ſciſ-
              <lb/>
            ſuræ laminæ v (V) & </s>
            <s xml:id="echoid-s3760" xml:space="preserve">filum paxillo p annexum globo etiam
              <lb/>
            conjungitur, dum per idem foramen in prominentiâ globi
              <lb/>
            tranſit cum filo primo. </s>
            <s xml:id="echoid-s3761" xml:space="preserve">Ope paxilli p ita fili ſecundi longitudo
              <lb/>
            determinatur, ut ad altitudinem octavæ partis pollicis pondus
              <lb/>
            in ſuſtentaculo, receſſu globi a centro, elevari poſſit quieſcente
              <lb/>
            lamina v; </s>
            <s xml:id="echoid-s3762" xml:space="preserve">ſi autem magis a centro recedat globus, trahitur la-
              <lb/>
            mina hæc, relaxatur elaſterium, & </s>
            <s xml:id="echoid-s3763" xml:space="preserve">ſegmentum k in latus pyxidis
              <lb/>
            impingit, ſtrepituſque auditur, qui magis erit intenſus ſi la-
              <lb/>
            tus pyxidis etiam ſegmento ſphæræ ex ligno duriore aut e-
              <lb/>
            bore muniatur.</s>
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