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

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        <div xml:id="echoid-div2490" type="section" level="1" n="624">
          <pb o="122" file="0644" n="711" rhead="PHYSICES ELEMENTA"/>
          <p>
            <s xml:id="echoid-s16599" xml:space="preserve">Ex v progrediendo, Planeta continuò decreſcit, in D ha.
              <lb/>
            </s>
            <s xml:id="echoid-s16600" xml:space="preserve">
              <note position="left" xlink:label="note-0644-01" xlink:href="note-0644-01a" xml:space="preserve">1021.</note>
            bet figuram d, in e & </s>
            <s xml:id="echoid-s16601" xml:space="preserve">f delineatur, ut in E & </s>
            <s xml:id="echoid-s16602" xml:space="preserve">F apparet,
              <lb/>
            ulteriuſque decreſcit, donec evaneſcat in V; </s>
            <s xml:id="echoid-s16603" xml:space="preserve">deinde iterum
              <lb/>
            creſcit ſucceſſivè mutando figuram, donec totum hæmiſphæ-
              <lb/>
            rium illuminatum verſus Tellurem dirigatur.</s>
            <s xml:id="echoid-s16604" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16605" xml:space="preserve">Quando nodus datur in V, aut in viciniis, Planeta in ipſo
              <lb/>
              <note position="left" xlink:label="note-0644-02" xlink:href="note-0644-02a" xml:space="preserve">1022.</note>
            diſco Solis, & </s>
            <s xml:id="echoid-s16606" xml:space="preserve">quaſi Soli applicatum, videtur, & </s>
            <s xml:id="echoid-s16607" xml:space="preserve">obſervatur ma-
              <lb/>
            cula nigra, quæ ſuper Solis ſuper ficie movetur: </s>
            <s xml:id="echoid-s16608" xml:space="preserve">in hoc caſu,
              <lb/>
            propriè loquendo, Planetam non videmus, ſed ubi radios ſo-
              <lb/>
            lares intercipiat decernimus.</s>
            <s xml:id="echoid-s16609" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16610" xml:space="preserve">Quo minus à Tellure diſtat Planeta, eo major apparet
              <note position="left" xlink:label="note-0644-03" xlink:href="note-0644-03a" xml:space="preserve">1023.</note>
            & </s>
            <s xml:id="echoid-s16611" xml:space="preserve">magis lucidus; </s>
            <s xml:id="echoid-s16612" xml:space="preserve">ſed dum ad Tellurem accedit, pars lucida
              <lb/>
              <note symbol="*" position="left" xlink:label="note-0644-04" xlink:href="note-0644-04a" xml:space="preserve">733.</note>
            viſibilis minuitur, ita ut ex unâ cauſâ creſcat lumen, ex a-
              <lb/>
            liâ minuatur; </s>
            <s xml:id="echoid-s16613" xml:space="preserve">daturque diſtantia, ad quam lux reflexa eſt
              <lb/>
            maxima.</s>
            <s xml:id="echoid-s16614" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div2502" type="section" level="1" n="625">
          <head xml:id="echoid-head813" xml:space="preserve">CAPUT V.</head>
          <head xml:id="echoid-head814" style="it" xml:space="preserve">De Pbænomenis Planetarum ſuperiorum, ex horum
            <lb/>
          & Telluris motibus in orbitis ſuis.</head>
          <p>
            <s xml:id="echoid-s16615" xml:space="preserve">IN multis, cum explicatis circa Planetas inferiores, coin-
              <lb/>
            cidunt ſuperiorum motus apparentes, in multis differunt.
              <lb/>
            </s>
            <s xml:id="echoid-s16616" xml:space="preserve">Non ſemper hi Solem comitantur, ſed ſæpe in oppoſitione
              <lb/>
              <note position="left" xlink:label="note-0644-05" xlink:href="note-0644-05a" xml:space="preserve">1024.</note>
            obſervantur; </s>
            <s xml:id="echoid-s16617" xml:space="preserve">in motu tamen, ut de inferioribus dictum,
              <lb/>
            non ſemper in conſequentiâ ferri videntur, ſed ſæpe ſtationa-
              <lb/>
              <note position="left" xlink:label="note-0644-06" xlink:href="note-0644-06a" xml:space="preserve">1025.</note>
            rii, ſæpe retrogradi ſunt.</s>
            <s xml:id="echoid-s16618" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16619" xml:space="preserve">Sit M Planeta ſuperior, ex gr. </s>
            <s xml:id="echoid-s16620" xml:space="preserve">Mars, in orbitâ; </s>
            <s xml:id="echoid-s16621" xml:space="preserve">ATHB
              <lb/>
              <note position="left" xlink:label="note-0644-07" xlink:href="note-0644-07a" xml:space="preserve">1026.</note>
            orbita Telluris. </s>
            <s xml:id="echoid-s16622" xml:space="preserve">Tempus periodicum Telluris brevius eſt
              <lb/>
              <note position="left" xlink:label="note-0644-08" xlink:href="note-0644-08a" xml:space="preserve">TAB. XXII.
                <lb/>
              fig. 1.</note>
            tempore periodico Martis ; </s>
            <s xml:id="echoid-s16623" xml:space="preserve">ideò inter hunc & </s>
            <s xml:id="echoid-s16624" xml:space="preserve">Solem
              <note symbol="*" position="left" xlink:label="note-0644-09" xlink:href="note-0644-09a" xml:space="preserve">948.</note>
            motu ſuo tranſit ellus, in quo caſu Planeta in F, inter ſtel-
              <lb/>
            las fixas Soli oppoſitus, apparet. </s>
            <s xml:id="echoid-s16625" xml:space="preserve">Per Mducantur lineæ BM;
              <lb/>
            </s>
            <s xml:id="echoid-s16626" xml:space="preserve">AM, orbitam Telluris tangentes, quæ continuatæ in G & </s>
            <s xml:id="echoid-s16627" xml:space="preserve">D
              <lb/>
            in ſphærâ ſtellarum fixarum pertingunt. </s>
            <s xml:id="echoid-s16628" xml:space="preserve">Concipiamus,
              <lb/>
            dum Planeta in orbitâ transfertur, lineas has etiam moveri,
              <lb/>
            ita ut puncta A & </s>
            <s xml:id="echoid-s16629" xml:space="preserve">B, in quibus lineæ per Planetam tranſeun-
              <lb/>
            tes orbitam Telluris tangunt, in tempore periodico Pla-
              <lb/>
            netæ revolutionem peragant. </s>
            <s xml:id="echoid-s16630" xml:space="preserve">Cùm autem Tellus </s>
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