Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

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            <s xml:id="echoid-s8134" xml:space="preserve">
              <pb o="639" file="0379" n="398" rhead="DE SATURNI ANNULO."/>
            riter ac exhibui in Syſtemate Saturni Tab. </s>
            <s xml:id="echoid-s8135" xml:space="preserve">XLIX. </s>
            <s xml:id="echoid-s8136" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s8137" xml:space="preserve">6.</s>
            <s xml:id="echoid-s8138" xml:space="preserve">;
              <lb/>
            quod, æque ac inſtaurata brachia, congruit cum iis quæ ſtatui
              <lb/>
            in illo Syſtemate de annulo, quo cingitur Saturnus. </s>
            <s xml:id="echoid-s8139" xml:space="preserve">Sed
              <lb/>
            quoniam hæc hypotheſis præcipue confirmatur obſervationi-
              <lb/>
            bus, quas ultimo anno fecimus, quarum quædam nondum cum
              <lb/>
            publico communicatæ fuere, ut mihi veniam concedas rogo has
              <lb/>
            nunc memorare, cum annotationibus, quas ad eas feci.</s>
            <s xml:id="echoid-s8140" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s8141" xml:space="preserve">Anno 1671 Saturnus apparuit rotundus ſine brachiis aut
              <lb/>
            anſis uti prædixi ante annos 14, quum publici juris feci meum
              <lb/>
            Syſtema, licet id acciderit duobus menſibus prius quam ex-
              <lb/>
            pectaveram, ſcilicet in fine menſis Maji. </s>
            <s xml:id="echoid-s8142" xml:space="preserve">Percepta deinde eſt
              <lb/>
            quædam interruptio figuræ rotundæ, quam non prævidi, & </s>
            <s xml:id="echoid-s8143" xml:space="preserve">
              <lb/>
            quam difficulter admodum prævidere potuiſſem, quia Satur-
              <lb/>
            num tantum obſervaram per unicum annum, cum hæc va-
              <lb/>
            ticinarer. </s>
            <s xml:id="echoid-s8144" xml:space="preserve">Sed noſti, quam primum intellexerim, brachia
              <lb/>
            rediiſle, quod D
              <emph style="super">US</emph>
            Caſſini obſervavit 11 & </s>
            <s xml:id="echoid-s8145" xml:space="preserve">14 Auguſti,
              <lb/>
            me affirmaſſe illa certo certius brevi iterum peritura,
              <lb/>
            quod quoque verum repertum eſt; </s>
            <s xml:id="echoid-s8146" xml:space="preserve">nam 4 Novembris bra-
              <lb/>
            chia Saturni erant adeo obſcura, ut dubitarem an qui-
              <lb/>
            dem iterum apparerent, licet D
              <emph style="super">US</emph>
            Caſſini affirmet ſe illa per-
              <lb/>
            cepiſſe ultimâ vice 13 menſis ſequentis Decembris, poſt quod
              <lb/>
            tempus figura rotunda duravit, donec Saturnus in radios
              <lb/>
            Solares ſe abſcondit.</s>
            <s xml:id="echoid-s8147" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s8148" xml:space="preserve">Hæc ultima brachiorum Eclipſis præcipue veritatem meæ
              <lb/>
              <note position="right" xlink:label="note-0379-01" xlink:href="note-0379-01a" xml:space="preserve">Saturnus
                <lb/>
              rotundus.</note>
            hypotheſeos probat; </s>
            <s xml:id="echoid-s8149" xml:space="preserve">facile enim patet quam difficile fuiſſet ſe-
              <lb/>
            cundam prævidere mutationem, priori adeo vicinam, niſi
              <lb/>
            illius veram cauſam perſpectam habuiſſem; </s>
            <s xml:id="echoid-s8150" xml:space="preserve">præterquam quod
              <lb/>
            modus, quo brachia ſecunda vice ablata fuere isipſe ſit, quem
              <lb/>
            ſtatui in meo Syſtemate. </s>
            <s xml:id="echoid-s8151" xml:space="preserve">Vidimus enim illa pedetentim de-
              <lb/>
            ficere à claritate ſuâ, licet ſemper manſerint ſatis ampla;
              <lb/>
            </s>
            <s xml:id="echoid-s8152" xml:space="preserve">quod erat certum indicium, radios ſolis valde oblique il-
              <lb/>
            luſtrare ſuperficiem annuli Saturni, quæ ad nos converſa
              <lb/>
            erat, quam tandem non amplius illuſtrarunt ſed quidem op-
              <lb/>
            poſitam. </s>
            <s xml:id="echoid-s8153" xml:space="preserve">In præcedenti apparitione figuræ rotundæ, à fine
              <lb/>
            Maji uſque ad 14 Auguſti, brachia latebant, non quia
              <lb/>
            non illuſtrabantur, ſed quia viſus noſter, parum </s>
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