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

Table of contents

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[111.] III. DOMINI GREGORII RESPONSUM AD ANIMADVERSIONES DOMINI HUGENII, IN EJUS LIBRUM, DE VERA CIRCULI ET HYPERBOLÆ QUADRATURA.
[112.] PROP. X. PROBLEMA.
[113.] Tom. II. Nnn
[114.] CONSECTARIUM.
[115.] IV. EXCERPTA EX LITERIS Dni. HUGENII DE RESPONSO, QUOD Dnus. GREGORIUS DEDIT AD EXAMEN LIBRI, CUI TITULUS EST, VERA CIRCULI ET HYPERBOLÆ QUADRATURA.
[116.] V. EXCERPTA EX EPISTOLA D. JACOBI GREGORII, CONTINENTE QUASDAM EJUS CONSIDERATIO-NES, SUPER EPISTOLA D. HUGENII, IMPRESSA IN VINDICATIONEM EXAMINIS SUI LIBRI, DE VERA CIRCULI ET HY-PERBOLÆ QUADRATURA.
[117.] FINIS.
[118.] CHRISTIANI HUGENII GEOMETRICA VARIA. Tom. II. Ppp
[119.] I. CONSTRUCTIO LOCI AD HYPERBOLAM PER ASYMPTOTOS.
[120.] DEMONSTRATIO.
[121.] II. DEMONSTRATIO REGULÆ DE MAXIMIS ET MINIMIS.
[122.] Tom. II. Qqq
[123.] III. REGULA Ad inveniendas Tangentes linearum curvarum.
[124.] Tom. II. Rrr
[125.] IV. CHRISTIANI HUGENII EPISTOLA DE CURVIS QUIBUSDAM PECULIARIBUS.
[126.] V. PROBLEMA AB ERUDITIS SOLVENDUM: A JOHANNE BERNOULLIO IN ACTIS LIPSIENSIBUS ANNI MDCXCIII. PROPOSITUM.
[127.] Tom. II. Ttt
[128.] VI. C. H. Z. DE PROBLEMATE BERNOULLIANO IN ACTIS LIPSIENSIBUS PROPOSITO.
[129.] VII. C. H. Z. CONSTRUCTIO UNIVERSALIS PROBLEMATIS A CLARISSIMO VIRO JOH. BERNOULLIO PROPOSITI.
[130.] FINIS.
[131.] CHRISTIANI HUGENII OPERA ASTRONOMICA. Tomus Tertius.
[132.] Tomi tertii contenta.
[133.] CHRISTIANI HUGENII DE SATURNILUNA OBSERVATIO NOVA. Tom. III. Ttt
[134.] CHRISTIANI HUGENII DE SATURNI LUNA OBSERVATIO NOVA.
[135.] Tom. III. Vvv.
[136.] CHRISTIANI HUGENII ZULICHEMII, CONST. F. SYSTEMA SATURNIUM, SIVE DE CAUSIS MIRANDORUM SATURNI PHÆNOMENON; ET COMITE EJUS PLANETA NOVO.
[137.] SERENISSIMO PRINCIPI LEOPOLDO AB HETRURIA Chriſtianus Hugenius S.D.
[138.] Tom. III. Xxx
[139.] NICOLAUS HEINSIUS, D. F. AD AUCTOREM SYSTEMATIS.
[140.] CHRISTIANI HUGENII Zulichemii, Cθnst. F. SYSTEMA SATURNIUM.
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            circumferentiæ portio deſcribatur quæ capiat angulum ipſi
              <lb/>
            B F A æqualem. </s>
            <s xml:id="echoid-s2378" xml:space="preserve">Secabit ea productum latus F A, ut mo-
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            do oſtendetur. </s>
            <s xml:id="echoid-s2379" xml:space="preserve">Itaque ad interſectionis punctum C ducatur
              <lb/>
            B C. </s>
            <s xml:id="echoid-s2380" xml:space="preserve">Dico hujus partem interceptam D C lineæ datæ K æ-
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            qualem eſſe. </s>
            <s xml:id="echoid-s2381" xml:space="preserve">Quod autem circumferentia deſcripta latus F A
              <lb/>
            productum ſecabit, ſic primùm oſtenditur. </s>
            <s xml:id="echoid-s2382" xml:space="preserve">Ducatur A N
              <lb/>
            ita ut ſit angulus B A N angulo B F A vel B E A æqualis.
              <lb/>
            </s>
            <s xml:id="echoid-s2383" xml:space="preserve">Itaque triangulus B A N triangulo B E A ſimilis eſt, ac
              <lb/>
            proinde iſoſceles quoque. </s>
            <s xml:id="echoid-s2384" xml:space="preserve">Quare ſi ſuper B N circumferen-
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            tia deſcribatur quæ capiat angulum B F A, ea continget
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            latus F A in A puncto. </s>
            <s xml:id="echoid-s2385" xml:space="preserve">Sed B G major eſt quam B N: </s>
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            nam quadratum A G majus eſt quadrato A N vel A B, cum
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            ſit æquale quadratis ex K & </s>
            <s xml:id="echoid-s2387" xml:space="preserve">A B. </s>
            <s xml:id="echoid-s2388" xml:space="preserve">Quare A G cadet extra
              <lb/>
            triangulum iſoſcelem B A N. </s>
            <s xml:id="echoid-s2389" xml:space="preserve">Itaque manifeſtum eſt cir-
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            cumferentiam ſuper B G deſcriptam capientemque angulum
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            ipſi B F A vel B A N æqualem ſecare lineam F A C. </s>
            <s xml:id="echoid-s2390" xml:space="preserve">Eſto
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            alterum interſectionis punctum M & </s>
            <s xml:id="echoid-s2391" xml:space="preserve">jungantur B M, G C,
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            & </s>
            <s xml:id="echoid-s2392" xml:space="preserve">cadat in B E ex A perpendicularis A L.</s>
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          </p>
          <p>
            <s xml:id="echoid-s2394" xml:space="preserve">Quia igitur quadratum A G æquale eſt quadratis ex K & </s>
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            A B: </s>
            <s xml:id="echoid-s2396" xml:space="preserve">atque idem quadratum A G æquale quadratis A B & </s>
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            B G minus duplo rectangulo G B L, hoc eſt, minus rectan-
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            gulo G B N; </s>
            <s xml:id="echoid-s2398" xml:space="preserve">erit K quadratum æquale quadrato B G mi-
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            nùs rectangulo G B N, hoc eſt, rectangulo B G N. </s>
            <s xml:id="echoid-s2399" xml:space="preserve">Eſt
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            autem ut rectangulum B G N ad rectang. </s>
            <s xml:id="echoid-s2400" xml:space="preserve">B E, G N, ita
              <lb/>
            B G ad B E. </s>
            <s xml:id="echoid-s2401" xml:space="preserve">Ergo ut B G ad B E ita quoque quadratum
              <lb/>
            K ad rectangulum G N, B E, hoc eſt, rectangulum G B E
              <lb/>
            minùs rectangulo N B E. </s>
            <s xml:id="echoid-s2402" xml:space="preserve">Eſt autem rectangulo G B E æ-
              <lb/>
            quale rectang. </s>
            <s xml:id="echoid-s2403" xml:space="preserve">C B D, quoniam G B ad B C ut D B ad B E
              <lb/>
            propter triangulos ſimiles G B C, D B E; </s>
            <s xml:id="echoid-s2404" xml:space="preserve">habent enim an-
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            gulum ad B communem, & </s>
            <s xml:id="echoid-s2405" xml:space="preserve">angulus B C G ipſi B E D eſt
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            æqualis. </s>
            <s xml:id="echoid-s2406" xml:space="preserve">Item rectangulo N B E æquale eſt quadratum A B
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            quia propter triangulos ſimiles eſt N B ad B A ut A B ad
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            B E. </s>
            <s xml:id="echoid-s2407" xml:space="preserve">Ergo erit G B ad B E ut quadratum K ad rectangu-
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            lum C B D minùs quadrato A B. </s>
            <s xml:id="echoid-s2408" xml:space="preserve">Eſt autem rectangulo
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            C B D minùs quadr. </s>
            <s xml:id="echoid-s2409" xml:space="preserve">A B æquale rectangulum D A, A C;
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            </s>
            <s xml:id="echoid-s2410" xml:space="preserve">quod ſic oſtenditur. </s>
            <s xml:id="echoid-s2411" xml:space="preserve">Etenim quia quadrilaterum C G B </s>
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