Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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CHRIST. HUGENII
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cum non procul ab oppoſito limite diſtaret. </
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xml:space
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plurium autoritas & </
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xml:space
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">propria experientia conſirmat, haud
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cunctanter hac in re amplectemur: </
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xml:space
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certam ſemperque obviam obſervandi methodum tradiderim,
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quin ea adhibita vir veri amantiſſimus priorem ſententiam
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volens abdicaturus ſit. </
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<
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xml:space
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">Illud utique nobiſcum novit, fruſtra
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ſive hunc ſive alium quemlibet obſervandi modum, ad diri-
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mendam inter nos hanc litem, uſurpari, quando circa ſigna
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Cancri vel Capricorni Saturnus commoratur, quoniam ibi
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diſcerni nequit utrum æquatori an eclipticæ parallela ſit quæ
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per anſas ducitur, eò quod in his locis parallelus æquatoris
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eclipticam non interſecet ſed tangat. </
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xml:space
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">Ricciolus ſibi
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contrarius.
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lib. 7. Al-
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mag. novi.</
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etiam quo pacto Ricciolus, obſervationem Grimaldi adfe-
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rens anno 1650, 18 Martii habitam, quæ probat eo tempo-
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re hanc anſarum lineam eclipticæ obliquam incidiſſe, non a-
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nimadverterit contrarium ejus quod intenderat illa obſerva-
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tione evinci: </
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<
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">ſi enim tunc, Saturno prope initium Cancri
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agente, non erat eclipticæ parallela anſarum linea, ne qui-
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dem æquatori parallela fuerit, ut conſtat ex modo dictis.
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</
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ſervationibus docuit, & </
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experientiæ propriæ & </
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">ſententiæ ſuæ, quam veram eſſe de-
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monſtravimus, planè hîc adverſatur. </
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<
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xml:space
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ſervatio, quanquam alioqui in hoc negotio verſatiſſimi at-
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que experientiſſimi, vitio aliquo laborare cenſenda eſt; </
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qua forſitan priore fixa à Saturno contecta, vel ob fulgorem
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cerni prohibita, aliam deinde teleſcopio detexerit prius non
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animadverſam, proque eadem illa habuerit. </
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parallelam æquatori brachiorum lineam eſſe indubitatis ratio-
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nibus ſatis jam adſtruxerimus, deinceps ad annuli noſtri hy-
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potheſin hunc cjus ſitum applicemus, indeque phænomenôn
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cauſas ſingulas derivari doceamus.</
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<
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">Eſto itaque Saturni orbita, quam 30 circiter annis ille
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potheſeos no-
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ſtræ expla-
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natio.</
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emetitur, A B C D; </
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clinationis gr. </
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">2 {1/2} non hic rationem habebimus) circulus
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F E, orbem magnum ſive telluris orbitam referens, quam
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fig. 2.</
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