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

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          <pb o="(110)" file="0630" n="696" rhead="PHYSICES ELEMENTA"/>
          <p style="it">
            <s xml:id="echoid-s16058" xml:space="preserve">Planeta non æquali celeritate in omnibus punctis orbitæ ſuæ
              <lb/>
              <note position="left" xlink:label="note-0630-01" xlink:href="note-0630-01a" xml:space="preserve">943.</note>
            fertur; </s>
            <s xml:id="echoid-s16059" xml:space="preserve">quo minus à Sole diſtat, eo celerius movetur; </s>
            <s xml:id="echoid-s16060" xml:space="preserve">& </s>
            <s xml:id="echoid-s16061" xml:space="preserve">tem-
              <lb/>
              <note position="left" xlink:label="note-0630-02" xlink:href="note-0630-02a" xml:space="preserve">944.</note>
            pora, in quibus arcus varii orbitæ percurruntur, ſunt inter ſe
              <lb/>
            ut areæ, lineis ad centrum Solis ductis, formatæ; </s>
            <s xml:id="echoid-s16062" xml:space="preserve">Arcus AB
              <lb/>
            & </s>
            <s xml:id="echoid-s16063" xml:space="preserve">a E percurruntur in temporibus, quæ ſunt inter ſe, ut areæ
              <lb/>
            triangulorum mixtorum AFB, a FE.</s>
            <s xml:id="echoid-s16064" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16065" xml:space="preserve">Omnes Planetæ verſus eandem partem feruntur; </s>
            <s xml:id="echoid-s16066" xml:space="preserve">& </s>
            <s xml:id="echoid-s16067" xml:space="preserve">ho-
              <lb/>
              <note position="left" xlink:label="note-0630-03" xlink:href="note-0630-03a" xml:space="preserve">945.</note>
            rum motus, in orbitis ſuis, eſt contrarius motui, quem quoti-
              <lb/>
            die in omnibus corporibus cœleſtibus obſervamus, quo in
              <lb/>
            uno die tellurem circumferri videntur, de quo in ſequen-
              <lb/>
            tibus.</s>
            <s xml:id="echoid-s16068" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div2419" type="section" level="1" n="610">
          <head xml:id="echoid-head795" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          13.</head>
          <p>
            <s xml:id="echoid-s16069" xml:space="preserve">Motus, qualis eſt Planetarum in orbitis, dicitur in conſe-
              <lb/>
              <note position="left" xlink:label="note-0630-04" xlink:href="note-0630-04a" xml:space="preserve">946.</note>
            quentiâ, & </s>
            <s xml:id="echoid-s16070" xml:space="preserve">directus.</s>
            <s xml:id="echoid-s16071" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div2421" type="section" level="1" n="611">
          <head xml:id="echoid-head796" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          14.</head>
          <p style="it">
            <s xml:id="echoid-s16072" xml:space="preserve">Motus contrarius dicitur in antecedentiâ; </s>
            <s xml:id="echoid-s16073" xml:space="preserve">aliquando etiam
              <lb/>
              <note position="left" xlink:label="note-0630-05" xlink:href="note-0630-05a" xml:space="preserve">947.</note>
            retrogradus.</s>
            <s xml:id="echoid-s16074" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16075" xml:space="preserve">Quo à Sole magis removentur Planetæ, eo in orbitis lentiùs
              <lb/>
              <note position="left" xlink:label="note-0630-06" xlink:href="note-0630-06a" xml:space="preserve">948.</note>
            feruntur; </s>
            <s xml:id="echoid-s16076" xml:space="preserve">ita ut tempora periodica magis diſtantium majora
              <lb/>
            ſint, & </s>
            <s xml:id="echoid-s16077" xml:space="preserve">ex majori orbitâ percurſâ, & </s>
            <s xml:id="echoid-s16078" xml:space="preserve">ex lentiori motu.</s>
            <s xml:id="echoid-s16079" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div2424" type="section" level="1" n="612">
          <head xml:id="echoid-head797" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          15.</head>
          <p style="it">
            <s xml:id="echoid-s16080" xml:space="preserve">Axis Planetæ dicitur linea, quæ per centrum Planetæ tran-
              <lb/>
              <note position="left" xlink:label="note-0630-07" xlink:href="note-0630-07a" xml:space="preserve">949.</note>
            ſit, & </s>
            <s xml:id="echoid-s16081" xml:space="preserve">circa quam hicce rotatur.</s>
            <s xml:id="echoid-s16082" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16083" xml:space="preserve">Planetæ, ſaltem plerique, & </s>
            <s xml:id="echoid-s16084" xml:space="preserve">Sol ipſer circa axes revol-
              <lb/>
              <note position="left" xlink:label="note-0630-08" xlink:href="note-0630-08a" xml:space="preserve">950.</note>
            vuntur: </s>
            <s xml:id="echoid-s16085" xml:space="preserve">duo dantur circa quos, hujus reſpectu, obſervationes
              <lb/>
            inſtituere non licuit, qui hoc motu probabiliter non deſti-
              <lb/>
            tuuntur.</s>
            <s xml:id="echoid-s16086" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16087" xml:space="preserve">Motus hicce conſpirat cum motu Planetarum in orbitis,
              <lb/>
              <note position="left" xlink:label="note-0630-09" xlink:href="note-0630-09a" xml:space="preserve">951.</note>
            id eſt, eſt in antecedentiâ.</s>
            <s xml:id="echoid-s16088" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16089" xml:space="preserve">Axes ipſi motu parallelo feruntur, ita, ut ſingula axeos
              <lb/>
              <note position="left" xlink:label="note-0630-10" xlink:href="note-0630-10a" xml:space="preserve">952.</note>
            Planetæ puncta lineas æquales & </s>
            <s xml:id="echoid-s16090" xml:space="preserve">ſimiles deſcribant.</s>
            <s xml:id="echoid-s16091" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div2429" type="section" level="1" n="613">
          <head xml:id="echoid-head798" xml:space="preserve">
            <emph style="sc">Definitio</emph>
          16.</head>
          <p style="it">
            <s xml:id="echoid-s16092" xml:space="preserve">Axeos extremitates dicuntur Planetæ Poli.</s>
            <s xml:id="echoid-s16093" xml:space="preserve"/>
          </p>
          <note position="left" xml:space="preserve">953.</note>
          <p>
            <s xml:id="echoid-s16094" xml:space="preserve">Planetarum à Sole diſtantias ſatis accuratè inter ſe con-
              <lb/>
              <note position="left" xlink:label="note-0630-12" xlink:href="note-0630-12a" xml:space="preserve">954.</note>
            ferunt Aſtronomi; </s>
            <s xml:id="echoid-s16095" xml:space="preserve">ita ut totius Syſtematis ideam habeamus.
              <lb/>
            </s>
            <s xml:id="echoid-s16096" xml:space="preserve">
              <note position="left" xlink:label="note-0630-13" xlink:href="note-0630-13a" xml:space="preserve">
                <emph style="sc">TAB. XX.</emph>
                <lb/>
              fig. 1.</note>
            Orbium dimenſiones in hoc ſchemate repræſentantur, in quo
              <lb/>
            puncta NN, ſingulorum orbium Nodos deſignant.</s>
            <s xml:id="echoid-s16097" xml:space="preserve"/>
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