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

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        <div xml:id="echoid-div529" type="section" level="1" n="208">
          <pb file="0534" n="557" rhead="INDEX RERUM."/>
          <note style="it" position="right" xml:space="preserve">
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          In Jove dies eſſe horarum quinque. # 700.
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          Et perpetuum æquinoctium. # 701.
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          Planeticolis ſtellas fixas eodem modo ap-
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          # parere, ac nobis. # 702.
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          Qualis ſit Planetarum aſpectus, dierum
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          # ratio in Saturno. # 702.
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          Qualis ſit Annuli aſpectus in Saturno.
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          # 703.
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          De Luna pauciora conjici poſſe. # 704.
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          Satellitum Saturni & Jovis eandem ac
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          # Lunæ rationem eſſe. # 705.
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          Lunam montibus & vallibus diſtinctam
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          # eſſe. # 705.
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          Carere vero mari. # 705.
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          Fluviis. # 706.
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          Nubibus. # 706.
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          Aëre & aqua. # 706.
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          Hinc de animantibus & ſtirpibus incer-
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          # tiorem conjecturam eſſe. # 707.
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          Jovis ac Saturni Lunas, non ſecus ac
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          # noſtram Telluri, eandem partem ſuo
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          # Planetæ obvertere. # 707.
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          Lunæ incolis ſi qui ſint, qualis appari-
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          # tura ſit cælorum conſtitutio, dierum
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          # ratio, & c. # 708.
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          Quod ad Jovis & Saturni Lunas facile
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          # transferre eſt. # 709.
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          Solaris mundi ſecundum veram propor-
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          # tionem deſcriptio. # 710.
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          Immenſitas intervallorum inter Solem
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          # & Planetas illuſtratur comparatio-
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          # ne cum motu globi è tormento emiſſi.
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          # 711.
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          In Sole omnem conjecturam deficere.
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          # 712.
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          Faculas Solares incertas videri. # 712.
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          Propter calorem nulla illic vivere corpo-
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          # ra noſtris ſimilia. # 712.
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          Stellas fixas totidem eſſe Soles. # 713.
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          Eas ſpargi per vaſta cæli ſpatia, & a-
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          # lias ab aliis, ut proximas à Sole re-
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          # moveri. # 714.
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          Nec Solem præ cæteris eminere contra
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          # Keplerum notatur. # 714.
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          Nihil impedire, quo minus credamus cir-
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          # ca unamquamque ex fixis, ut circa
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          # Solem, eſſe Planetas. # 715.
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          Modus probabiliter inveſtigandi diſtan-
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          # tiam fixarum à Sole. # 717.
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          Unumquemque Solem vortice cingi, ſed
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          # Carteſianis multum diſſimili; contra
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          # quem pluribus diſputatur. # 719.
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        <div xml:id="echoid-div530" type="section" level="1" n="209">
          <head xml:id="echoid-head303" xml:space="preserve">TOMUS QUARTUS
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          OPERA MISCELLANEA.</head>
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            <emph style="sc">De</emph>
            <emph style="sc">Ratiociniis in</emph>
            <emph style="sc">Luddo</emph>
          A-
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          #
            <emph style="sc">LEÆ</emph>
          # 723. Ad calcem Exerci-
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          # tationum Math. Schotenii.
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          Si a vel b expectem, quorum utrumvis
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          # æquè facilè mibi obtingere poſſit, ex-
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          # pectatio mea dicenda eſt valere {a+b/2}.
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          # 728.
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          Si a, b, vel c, expectem, quorum unum-
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          # quodque pari facilitate mibi obtingere
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          # poſſit, expectatio mea æſtimanda eſt
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          # {a+b+c/3}. # 729.
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          Si numerus caſuum, quibus mibi eve-
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          # niet a, ſit p; numerus autem caſuum
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          # quibus mihi eveniet b, ſit q; ſumendo
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          # omnes caſus æquè in proclivi eſſe: ex-
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          # pectatio mea valebit {pa+bq/p+q}. # 730.
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          De facienda diſtributione inter diverſos
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