Casati, Paolo, De igne dissertationes physicae, 1686
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              <pb o="175" file="0603" n="603" rhead="De Cometis."/>
            coma vergebat, dicendum eſt ſuperficiem halitûs ſolares radios
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            refringentis non fuiſſe æquabiliter fuſam, nec ad perpendicu-
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            lum Soli obiectam, ſed eâ figurâ, quæ juxta diverſam inclina-
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            tionem excipiens radios, prout Cometa atque Sol movebantur,
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            eos, veſpere in Meridiem, mediâ nocte in Occaſum dirigeret.
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            </s>
            <s xml:id="echoid-s19618" xml:space="preserve">Porrò comæ inconſtantiam à Cardano notatam, atque mobi-
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            litatem, ſicut in tædarum flammâ flante vento, facilè tribue-
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            rem agitationi halitûs circumfuſi, quem ipſe Cometæ ardor
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            commoveret, & </s>
            <s xml:id="echoid-s19619" xml:space="preserve">ob admiſtam quaſi fuliginem ex incendio lux
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            fuſca, rubens ac turbida appareret.</s>
            <s xml:id="echoid-s19620" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s19621" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s19622" xml:space="preserve">Pręter ardentem Cometę nucleum ex terrenis aſpira-
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            tionibus conflatum, alias quoquè ejuſdem generis aſpirationes
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            ſidereis halitibus permiſtas, quę lucis refractę progreſſum im-
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            pediant, admittendas cenſerem, ut explicetur interrupta lucis
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            diffuſio, quæ quaſi ſcopas, ſivè ſtirias, caudæ radios conſtituit.
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            </s>
            <s xml:id="echoid-s19623" xml:space="preserve">Quanquam ſatis intelligo hoc etiam pendere poſſe ex inæquali
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            ipſorum halituum conſtipatione, adeò ut inęqualiter lucem
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            concipiant.</s>
            <s xml:id="echoid-s19624" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s19625" xml:space="preserve">Dand. </s>
            <s xml:id="echoid-s19626" xml:space="preserve">Nequid per diſſimulantiam prętereamus, quod ad
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            uberiorem hujuſce rei explicationem pertineat, occurrendum
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            eſt dubitationi, quâ quis ſuſpicari poſſet longè majorem eſſe
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            oportere Cometæ magnitudinem, quàm reipsâ ſit; </s>
            <s xml:id="echoid-s19627" xml:space="preserve">ſiquidem
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            halitûs nucleum complectentes lucem ſolarem & </s>
            <s xml:id="echoid-s19628" xml:space="preserve">ipſi conci-
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            pere poſſunt; </s>
            <s xml:id="echoid-s19629" xml:space="preserve">cenſendi ſunt autem æquè conſtipati, qui inter
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            Cometam, & </s>
            <s xml:id="echoid-s19630" xml:space="preserve">ſolem interiecti ſunt, ac illi qui Cometam ponè
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            ſequuntur, & </s>
            <s xml:id="echoid-s19631" xml:space="preserve">ad latera adiunguntur: </s>
            <s xml:id="echoid-s19632" xml:space="preserve">atque proinde, ſi caudæ
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            lux tam latè longéque diffunditur, amplum pariter fieret hinc
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            atque hinc lucis additamentum.</s>
            <s xml:id="echoid-s19633" xml:space="preserve"/>
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            <s xml:id="echoid-s19634" xml:space="preserve">Maur. </s>
            <s xml:id="echoid-s19635" xml:space="preserve">Ejuſdem Cometæ caudam eodem momento aliis
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            longiorem, aliis breviorem apparere ſæpè compertum eſt,
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            prout alii aliis præſtant oculorum acie; </s>
            <s xml:id="echoid-s19636" xml:space="preserve">lux enim languidior,
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            cujuſmodi eſt in extremâ caudâ, non æquè omnium oculos
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            ferit. </s>
            <s xml:id="echoid-s19637" xml:space="preserve">Hinc manifeſtum eſt, etiamſi Solis lux pervadat uni-
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            verſos halitûs Cometæ nucleo circumfuſos, non tamen eorum
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            lucem tantam eſſe, ut nobis conſpicua fiat; </s>
            <s xml:id="echoid-s19638" xml:space="preserve">ex eâ autem, quam
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            cernimus, Cometæ magnitudinem ęſtimamus. </s>
            <s xml:id="echoid-s19639" xml:space="preserve">Illorum igitur
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            halituum lux videri poterit, qui uberiori luce imbuuntur; </s>
            <s xml:id="echoid-s19640" xml:space="preserve">hi
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            verò ſunt, quos non ſolùm radius directus afficit, ſed præterea
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            etiam refractus; </s>
            <s xml:id="echoid-s19641" xml:space="preserve">id quod iis contingit, qui caudam conſtituunt,
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            pro ipſius refractionis modo. </s>
            <s xml:id="echoid-s19642" xml:space="preserve">Cęterùm quia halitûs nucleo pro-
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            ximi prę remotis paulò denſiùs conſtipati uberiùs tum </s>
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