Apollonius <Pergaeus>, Apollonii Pergaei Conicorvm Lib. V. VI. VII. paraphraste Abalphato Asphahanensi : nunc primum editi ; additvs in calce Archimedis assvmptorvm liber, ex codibvs arabicis mss Abrahamus Ecchellensis Maronita latinos reddidit, Jo. Alfonsvs Borellvs curam in geometricis versione contulit & [et] notas vberiores in vniuersum opus adiecit

Table of contents

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[331.] LEMMA XIV.
[332.] LEMMA XV.
[333.] Notæ in Propoſit. XXXXI.
[334.] Notæ in Propoſit. XXXXVII.
[335.] Notæ in Propoſit. XXXXVIII.
[336.] SECTIO DECIMA Continens Propoſit. XXXXIX. XXXXX. & XXXXXI.
[337.] In Sectionem X. Propoſit. XXXXIX. XXXXX. & XXXXXI. LEMMA XVI.
[338.] LEMMA XVII.
[339.] LEMMA XVIII.
[340.] Notæ in Propoſit. XXXXIX.
[341.] Notæ in Propoſit. XXXXX.
[342.] Notæ in Propoſit. XXXXXI.
[343.] SECTIO VNDECIMA Continens Propoſit. XXXII. & XXXI. Apollonij.
[344.] Notæ in Propoſit. XXXI. & XXXII.
[345.] LIBRI SEPTIMI FINIS.
[346.] LIBER ASSVMPTORVM INTERPRETE THEBIT BEN-KORA EXPONENTE AL MOCHT ASSO Ex Codice Arabico manuſcripto SERENISS. MAGNI DV CIS ETRVRIÆ, ABRAHAMVS ECCHELLENSIS Latinè vertit. IO: ALFONSVS BORELLVS Notis Illuſtrauit.
[347.] Præfatio ad Lectorem.
[348.] MISERICORDIS MISERATORIS CVIVS OPEM IMPLORAMVS. LIBER ASSVMPTORVM ARCHIMEDIS, INTERPRETE THEBIT BEN-KORA, Et exponente Doctore ALMOCHTASSO ABILHASAN, Halì Ben-Ahmad Noſuenſi. PROPOSITIONES SEXDECIM.
[349.] PROPOSITIO I.
[350.] SCHOLIVM ALMOCHTASSO.
[351.] Notæ in Propoſit. I.
[352.] PROPOSITIO II.
[353.] SCHOLIVM ALMOCHTASSO.
[354.] Notæ in Propoſ. II.
[355.] PROPOSITIO III.
[356.] Notæ in Propoſit. III.
[357.] PROPOSITIO IV.
[358.] Notæ in Propoſit. IV.
[359.] PROPOSITIO V.
[360.] SCHOLIVM ALMOCHTASSO.
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              <pb o="396" file="0434" n="435" rhead="Archimedis"/>
            demonſtrationis ſpectes; </s>
            <s xml:id="echoid-s13250" xml:space="preserve">differunt tamen in concluſione, quæ demonſtranda pro-
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            ponitur; </s>
            <s xml:id="echoid-s13251" xml:space="preserve">oſtendit enim Pap-
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            pus, ſicut, & </s>
            <s xml:id="echoid-s13252" xml:space="preserve">Archime-
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            des, ſemicircularis diame-
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            tri ſegmentum maius A C
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            ad circuli intercepti dia-
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            metrum H E habere ean-
              <lb/>
            dem proportionem, quàm
              <lb/>
            maioris circuli diameter A
              <lb/>
            B habet ad reliquum ſeg-
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            mentum eius B C, pari-
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            terque B A ad A C ean-
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            dem proportionem habet,
              <lb/>
            quàm C B ad reliqui circuli intercepti L M N diametrum: </s>
            <s xml:id="echoid-s13253" xml:space="preserve">ex hiſce ſequitur
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            concluſio Archimedea, nam ſi A C ad H E eandem rationem habet, quàm A
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            B ad B C, permutando B A ad A C erit vt C B ad H E igitur eadem C B ad
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            duas circulorum diametros H E, & </s>
            <s xml:id="echoid-s13254" xml:space="preserve">L N eandem proportionem habet, & </s>
            <s xml:id="echoid-s13255" xml:space="preserve">pro-
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            pterea circulorum diametri H E, & </s>
            <s xml:id="echoid-s13256" xml:space="preserve">L N æquales ſunt inter ſe. </s>
            <s xml:id="echoid-s13257" xml:space="preserve">Mirum ta-
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            maduertiſſe, demonſtrat tamen quamplurima ſymptomata pulcherrima circu-
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            lorum in Arbelo deſcriptorum, quæ tamen in hoc opuſculo Archimedi tributo
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            pariter recenſeri debebant, ſi hic liber eſſet idem antiquus ille à Pappo viſus,
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            in quo huiuſmodi lemmata circumferebantur: </s>
            <s xml:id="echoid-s13258" xml:space="preserve">ſed for ſan librariorum vitio, & </s>
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            incuria codex corruptiſſimus ad Arabes tranſmißus non omnes illas admirandas
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            propoſitiones, ſed vnius tantum particulam continebat, ſicut è contra liber ille
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            antiquus, in quo Pappus prædicta lemmata reperit, carebat concluſione in hi-
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            ſce lemmatibus demonſtrata. </s>
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            quidem ſunt, ſed abſque duabus prioribus poßet propoſitum facillimè demon-
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            ſtrari, Reliquæ duæ propoſitiones ſuperadditæ ad Arabibus faciles quidem
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            ſunt.</s>
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          <head xml:id="echoid-head456" xml:space="preserve">PROPOSITIO VI.</head>
          <p>
            <s xml:id="echoid-s13262" xml:space="preserve">SI fuerit femicirculus A B C, & </s>
            <s xml:id="echoid-s13263" xml:space="preserve">in eius diametro ſumatur
              <lb/>
            punctum D, & </s>
            <s xml:id="echoid-s13264" xml:space="preserve">fuerit A D ipſius D C ſexqui altera, & </s>
            <s xml:id="echoid-s13265" xml:space="preserve">
              <lb/>
            deſcribantur ſuper A D, D C duo ſemicirculi, & </s>
            <s xml:id="echoid-s13266" xml:space="preserve">ponatur cir-
              <lb/>
            culus E F inter tres ſemicirculos tangens eos, & </s>
            <s xml:id="echoid-s13267" xml:space="preserve">educatur dia-
              <lb/>
            meter E F in illo parallela diametro A C, reperiri debet pro-
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            portio diametri A C ad diametrum E F.</s>
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          <p>
            <s xml:id="echoid-s13269" xml:space="preserve">Iungamus enim duas lineas A E, E B, & </s>
            <s xml:id="echoid-s13270" xml:space="preserve">duas lineas C F, F B,
              <lb/>
            erunt C B, A B rectæ, vti dictũ eſt in prima propoſit. </s>
            <s xml:id="echoid-s13271" xml:space="preserve">Deſcribamus etiam
              <lb/>
            duas lineas F G A, E H C, oſtendeturque eſſe quoque rectas; </s>
            <s xml:id="echoid-s13272" xml:space="preserve">Simili-
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            ter duas lineas D E, D F, & </s>
            <s xml:id="echoid-s13273" xml:space="preserve">iungamus D I, D L, & </s>
            <s xml:id="echoid-s13274" xml:space="preserve">E M, F N, & </s>
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              <lb/>
            producamus eas ad O, P; </s>
            <s xml:id="echoid-s13276" xml:space="preserve">Et quia in triangulo A E D, A G eſt </s>
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