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

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[Item 1.]
[2.] CHRISTIANI HUGENII AZULICHEM, Dum viveret Zelhemi Toparchæ, OPERA VARIA. Volumen Secundum.
[3.] Lugduni Batavorum, Apud JANSSONIOS VANDER A@, Bibliopolas. MDCCXXIV.
[4.] MAX-PLANCK-INSTITUT FOR WISSENSCHAFTSGESCHICHTE Bibliothek
[5.] CHRISTIANI HUGENII OPERA GEOMETRICA. Tomus Secundus.
[6.] Tomi ſecundi contenta.
[7.] CHRISTIANI HUGENII, Const. F. THEOREMATA DE QUADRATURA HYPERBOLES, ELLIPSIS ET CIRCULI, EX DATO PORTIONUM GRAVITATIS CENTRO. Quibus ſubjuncta eſt Ε’ξέ{τα}{σι}ς Cyclometriæ Cl. Viri Gregorii à S. Vincentio, editæ Anno CIɔ Iɔcxlvii.
[8.] AD LECTOREM.
[9.] CHRISTIANI HUGENII, Const. F. THEOREMATA DE QUADRATURA HYPERBOLES, ELLIPSIS, ET CIRCULI, EX DATO PORTIONUM GRAVITATIS CENTRO Theorema I.
[10.] Theorema II.
[11.] Theorema III.
[12.] Theorema IV.
[13.] Lemma.
[14.] Theorema V.
[15.] Theorema VI.
[16.] Theorema VII.
[17.] Theorema VIII.
[18.] ἘΞἘΤΑΣΙΣ CYCLOMETRIÆ CLARISSIMI VIRI, GREGORII à S. VINCENTIO, S. J. Editæ Anno D. cIↄ Iↄc XLVII.
[19.] FINIS.
[20.] CHRISTIANI HUGENII, Const. F. AD C. V. FRAN. XAVERIUM AINSCOM. S.I. EPISTOLA, Qua diluuntur ea quibus Ε’ξε{τα}{σι}ς Cyclometriæ Gregorii à Sto. Vincentio impugnata fuit.
[21.] CHRISTIANI HUGENII, Const. F. AD C. V. FRAN. XAVERIUM AINSCOM. S. I. EPISTOLA. Cl. Viro D°. XAVERIO AINSCOM CHRISTIANUS HUGENIUS S. D.
[22.] CHRISTIANI HUGENII, Const. F. DE CIRCULI MAGNITUDINE INVENTA. ACCEDUNT EJUSDEM Problematum quorundam illuſtrium Conſtructiones.
[23.] PRÆFATIO.
[24.] CHRISTIANI HUGENII, Const. f. DE CIRCULI MAGNITUDINE INVENTA. Theorema I. Propositio I.
[25.] Theor. II. Prop. II.
[26.] Theor. III. Prop. III.
[27.] Theor. IV. Prop. IV.
[28.] Theor. V. Prop. V.
[29.] Theor. VI. Prop. VI.
[30.] Theor. VII. Prop. VII.
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            poſſumus æqualem invenire. </s>
            <s xml:id="echoid-s1071" xml:space="preserve">Quis autem ad veſtram illam hoc
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            pertinere credet, quæ irrito labore toto decennio quæſita eſt?
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            </s>
            <s xml:id="echoid-s1072" xml:space="preserve">Nam quod ſufficere exiſtimatis ſi modo viam commonſtraveri-
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            tis quâ emensâ ad quæſitum perveniatur, obſtacula vero, at-
              <lb/>
            que innumeras difficultates quibus præſepta eſt, non remove-
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            tis, videte cui perſuadere poſſitis, eâratione tetragoniſmi ne-
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            gotium à vobis confectum eſſe. </s>
            <s xml:id="echoid-s1073" xml:space="preserve">Illud ſanè vos conſequi apparet,
              <lb/>
            ut, dum ultra non proceditis, minus expoſiti ſitis ad promi-
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            ſcuos omnium inſultus, difficilius etiam à peritioribus oppu-
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            gnemini, paratioremque habeatis receptum. </s>
            <s xml:id="echoid-s1074" xml:space="preserve">Facile enim acrius
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            inſtantes proportionum & </s>
            <s xml:id="echoid-s1075" xml:space="preserve">proportionalitatum veſtrarum tene-
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            bris involvere poteſtis, atque eſſicere ut tandem veluti nox præ-
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            lium dirimat. </s>
            <s xml:id="echoid-s1076" xml:space="preserve">Hoc ipſum ne mihi eveniret, cum exetaſin Qua-
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            draturæ conſcriberem, metuebam, atque ut caverem operam
              <lb/>
            dedi; </s>
            <s xml:id="echoid-s1077" xml:space="preserve">id unum conatus, ut, quatenus fieri poſſet, autorem ad
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            abſurdum compellerem, nimirum ut vel nolle ſe vel non poſſe
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            Quadraturam ſuam abſolvere fateretur. </s>
            <s xml:id="echoid-s1078" xml:space="preserve">Eo fine ignota prius at-
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            que informia corpora dimenſus ſum, exhibitiſque prioribus
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            duabus ſolidorum proportionibus, petii ut inde tertiam elice-
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            ret, utpote quam cognitis illis notam dixiſſet. </s>
            <s xml:id="echoid-s1079" xml:space="preserve">Ad quas angu-
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            ſtias redactum non aliâ ratione defendis, quam expoſtulando
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            mecum quod autori tuo modum præſcribere præſumam qua-
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            drandi circulum, ac jubendo denique ut meminerim quid & </s>
            <s xml:id="echoid-s1080" xml:space="preserve">cui
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            ſcribam. </s>
            <s xml:id="echoid-s1081" xml:space="preserve">Ego verò quomodo quadratus fiat circulus, nec di-
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            dici, nec præſcribo; </s>
            <s xml:id="echoid-s1082" xml:space="preserve">ſed hoc urgeo; </s>
            <s xml:id="echoid-s1083" xml:space="preserve">ut quem ille modum ſe
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            inveniſſe contendit, eum reapſe utilem & </s>
            <s xml:id="echoid-s1084" xml:space="preserve">efficacem eſſe demon-
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            ſtret. </s>
            <s xml:id="echoid-s1085" xml:space="preserve">Atque ita, quid ſcripſerim & </s>
            <s xml:id="echoid-s1086" xml:space="preserve">in quem finem, me non
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            neſciviſſe, ſatis jam tibi conſtare arbitror. </s>
            <s xml:id="echoid-s1087" xml:space="preserve">Cui vero ſcripſerim,
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            ne hoc quidem puto me oblitum fuiſſe. </s>
            <s xml:id="echoid-s1088" xml:space="preserve">Vides autem quam hac
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            in parte longe diverſum ſonent Carteſii literæ atque Elogia ve-
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            ſtra: </s>
            <s xml:id="echoid-s1089" xml:space="preserve">quorum utris potius ſubſcribendum ſit aliorum judicio de-
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            cerni malim quam meum interponere. </s>
            <s xml:id="echoid-s1090" xml:space="preserve">Hoc tamen autorem
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            opinione apud me futurum, quanto maturius ab errore ſuo reſi-
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            piſcet. </s>
            <s xml:id="echoid-s1092" xml:space="preserve">Vale.</s>
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            <s xml:id="echoid-s1094" xml:space="preserve">Dat. </s>
            <s xml:id="echoid-s1095" xml:space="preserve">Hagæ Com. </s>
            <s xml:id="echoid-s1096" xml:space="preserve">2. </s>
            <s xml:id="echoid-s1097" xml:space="preserve">Oct.
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            <s xml:id="echoid-s1098" xml:space="preserve">1656.</s>
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