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

Table of handwritten notes

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            <s xml:id="echoid-s7273" xml:space="preserve">
              <pb o="607" file="0343" n="360" rhead="IN SYSTEMA SATURNIUM."/>
            ſervationibus repugnat; </s>
            <s xml:id="echoid-s7274" xml:space="preserve">nempe ubi planum annuli directè
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            in oculos incidit, annulus appareret ad inſtar zonæ rectæ,
              <lb/>
            æqualis diametro annuli, ac proinde majoris diametro Satur-
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            ni; </s>
            <s xml:id="echoid-s7275" xml:space="preserve">igitur ad inſtar brachiorum duæ appendices hinc inde
              <lb/>
            Saturnio globo adhærerent: </s>
            <s xml:id="echoid-s7276" xml:space="preserve">cum igitur hac difficultate, & </s>
            <s xml:id="echoid-s7277" xml:space="preserve">
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            hoc nodo inſolubili annularis illa hypotheſis laboraret; </s>
            <s xml:id="echoid-s7278" xml:space="preserve">fin-
              <lb/>
            xit illius auctor, extimam annuli ſuperficiem ineptam eſſe
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            ad luminis repercuſſionem, ac proinde faſciam illam nigri-
              <lb/>
            cantem inde ortum ducere, & </s>
            <s xml:id="echoid-s7279" xml:space="preserve">ob penuriam luminis reper-
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            cuſſi, extantes illas appendices ſub aſpectum noſtrum non
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            cadere: </s>
            <s xml:id="echoid-s7280" xml:space="preserve">Hæc habet pag. </s>
            <s xml:id="echoid-s7281" xml:space="preserve">542. </s>
            <s xml:id="echoid-s7282" xml:space="preserve">545. </s>
            <s xml:id="echoid-s7283" xml:space="preserve">576. </s>
            <s xml:id="echoid-s7284" xml:space="preserve">Aliam cauſam ſubnectit
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            pag. </s>
            <s xml:id="echoid-s7285" xml:space="preserve">585. </s>
            <s xml:id="echoid-s7286" xml:space="preserve">ab obliquitate radiorum illapſorum petitam, qua
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            fiat ut pars annuli ad nos obverſa obliquè dumtaxat illumi-
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            nata non videatur; </s>
            <s xml:id="echoid-s7287" xml:space="preserve">immo hoc alterum addit, ſuperficiem
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            annuli ad nos obverſam minimè à Sole illuminari; </s>
            <s xml:id="echoid-s7288" xml:space="preserve">ac proin-
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            de mirum non eſſe, quod minimè videri poſſit; </s>
            <s xml:id="echoid-s7289" xml:space="preserve">omiſeram,
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            quæ habet pag. </s>
            <s xml:id="echoid-s7290" xml:space="preserve">551. </s>
            <s xml:id="echoid-s7291" xml:space="preserve">de Saturnicolis.</s>
            <s xml:id="echoid-s7292" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s7293" xml:space="preserve">Cuncta hæc facilè difflantur; </s>
            <s xml:id="echoid-s7294" xml:space="preserve">nunquam enim faſciam il-
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            lam nigricantem, quamvis exquiſito teleſcopio uſus videre
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            potui; </s>
            <s xml:id="echoid-s7295" xml:space="preserve">nemo unquam præter illum obſervavit; </s>
            <s xml:id="echoid-s7296" xml:space="preserve">nec tamen
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            teleſcopia noſtra Hugenianis deteriora eſſe crediderim; </s>
            <s xml:id="echoid-s7297" xml:space="preserve">fi-
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            ctitia igitur cenſenda eſt illa faſcia, aut certè vitrorum vitio
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            tribuenda: </s>
            <s xml:id="echoid-s7298" xml:space="preserve">quod autem dicit, extimam illam annuli ſuper-
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            ficiem ad lumen reflectendum ineptam eſſe, vel ex eo falſum
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            eſſe conſtat, quòd in Saturni diſco partes omnes æquali lu-
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            mine perfuſæ videantur: </s>
            <s xml:id="echoid-s7299" xml:space="preserve">Nulla igitur pars ad nos obverſa
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            ad luminis reflexionem inepta eſt. </s>
            <s xml:id="echoid-s7300" xml:space="preserve">Præterea demus ita eſſe,
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            & </s>
            <s xml:id="echoid-s7301" xml:space="preserve">faſciam illam paulò obſcuriorem in Saturni diſco videri;
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            </s>
            <s xml:id="echoid-s7302" xml:space="preserve">nihil tamen obſtaret, quin brachia eodem lumine perſpicua
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            eſſent; </s>
            <s xml:id="echoid-s7303" xml:space="preserve">id eſt extrema ſegmenta apparentis zonæ, in quam
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            annulus hoc ſitu aſpectus projicitur, extantia, & </s>
            <s xml:id="echoid-s7304" xml:space="preserve">excurren-
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            tia hinc inde extra Saturnium globum, viderentur, eodem
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            licèt nigricante colore diluta. </s>
            <s xml:id="echoid-s7305" xml:space="preserve">Ad obliquitatem illapſorum
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            radiorum perperam confugit; </s>
            <s xml:id="echoid-s7306" xml:space="preserve">alioquin in cæteris planetis
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            eadem ratio militaret; </s>
            <s xml:id="echoid-s7307" xml:space="preserve">nempe fieri non poteſt, quin major
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            pars ſuperficiei convexæ, obliquum radiorum ſolarium </s>
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