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| Preface | |
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| Acknowledgments | |
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| Conventions | |
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| List of Figures | |
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| The Argument | |
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| Introduction | |
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| Simplicius' Life and Writings | |
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| The Commentary on De caelo 2.10-12 | |
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| The Place of 2.10-12 in the De caelo | |
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| Simplicius' Predicament | |
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| The Text and Translation | |
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| The Annotation | |
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| Planetary Retrogradation: A Review | |
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| The Heresy of Non-Homocentric Aetherial Motion | |
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| Aetherial Rotation | |
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| The Task Remaining | |
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| Simplicius on the Heavens | |
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| The Heretical Rejection of All Hypotheses | |
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| Simplicius, In phys. 2.2 193b22-35 | |
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| Aristotle on Physical Theory and Mathematical Science | |
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| Physical Theory and Astronomy Recast | |
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| Simplicius and the Path Not Taken | |
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| The Need for Observation | |
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| The Empirical Limitations of Astronomy | |
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| A Question of Priority | |
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| Conclusion | |
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| Simplicius, the Apologist | |
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| Saving Aristotle | |
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| The Harmonized Aristotle | |
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| Aristotle, the Physical Theorist | |
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| Conclusion | |
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| Saving the De caeto | |
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| Saving the Late Platonists | |
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| Conclusion | |
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| Simplicius, the Historian | |
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| Simplicius and His Sources | |
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| Alexander of Aphrodisias | |
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| On Teleology | |
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| On the Isodromic Planets | |
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| On the Motion by Nature of Larger Spheres | |
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| On a Circular Argument | |
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| On an Ellipsis | |
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| On the First Problem of 2.12 | |
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| On the Four Elements | |
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| On a Lexical Matter | |
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| Alexander and Porphyry | |
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| Conclusion | |
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| Eudemus of Rhodes | |
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| On Anaximander | |
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| Eudemus with Sosigenes | |
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| On Callippus | |
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| Conclusion | |
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| Claudius Ptolemy | |
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| Sosigenes | |
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| Coda | |
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| Conclusion | |
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| Translation | |
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| In de caelo 2.10. The proportionality of the planetary speeds | |
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| 291a29-b10 | |
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| 470.29-471.11 Contextualization | |
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| 471.12-14 Basic Astronomical Fact | |
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| 471.14-28 This Fact Is Unexpected | |
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| 471.29-472.4 Aristotle's Solution | |
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| 472.4-7 Problem with This Solution | |
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| 472.8-20 Alexander's Response | |
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| 472.21-473.7 Problem of Natural Motion Remains | |
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| 473.8-474.6 Another Solution | |
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| 474.7-13 Alexander The Isodromic Planets | |
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| 474.14-30 Criticism | |
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| 474.30-33 Alexander: The Upper Planets | |
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| 474-33-475.8 Criticism | |
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| 475.9-23 Plato on Planetary Speeds | |
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| 475-23-476.10 Aristotle Reinterpreted | |
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| 476.10-27 Rejection of Yet Another Solution | |
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| 476.28-477.2 Problem of Isodromic Planets Remains | |
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| In de caelo 2.11. The Sphericity of the Wandering Stars | |
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| 291b11-17 | |
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| 477.5-14 Contextualization | |
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| 477.14-23 First Argument for Sphericity | |
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| 477.24-27 Question of Circularity | |
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| 477.27-478.3 Alexander's Proposal | |
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| 478.3-8 Criticism | |
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| 478.8-14 Aristotle Reinterpreted | |
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| 478.15-32 Further Explication of First Argument | |
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| 291b17-23 | |
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| 479.3-10 Second Argument for Sphericity (Part 1) | |
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| 479.10-23 The Meaning of 'dichotomos' | |
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| 479.23-480.15 Lunar Phases and Sphericity | |
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| 480.16-24 Second Argument for Sphericity (Part 2) | |
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| In de caelo 2.12. The Proportionality of the Planetary Motions | |
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| 291b24-292a18 | |
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| 480.26-481.22 Restatement of the Lemma | |
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| 481.22-30 Alexander's Comment | |
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| 292a18-b10 | |
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| 482.3-485.2 The First Problem and Its Solution | |
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| 292b10-25 | |
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| 485.5-487.20 Further Explication of the Solution | |
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| 487.20-488.9 Simplicius' Reconstruction of the Solution | |
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| 488.10-14 Planetary Hypotheses Rejected | |
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| 488.14-24 Planetary Hypotheses: Genesis | |
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| 488.25-489.4 Criticism of the First Problem | |
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| 489.5-11 Plato and the True Account | |
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| 489.12-30 Alexander: The Elements Lack Soul | |
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| 292b25-30 | |
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| 489.33-490.16 Second Problem and First Response | |
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| 292b30-293a4 | |
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| 490.19-491.11 Second Response (or the First Continued) | |
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| 293a4-11 | |
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| 491-15-492.11 Second (or Third) Response | |
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| 492.12-24 This Response Assumes the Preceding | |
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| 492.25-493.11 A History of Planetary Hypotheses | |
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| 493.11-494.23 The Solar Hypothesis | |
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| 494.23-495.17 The Lunar Hypothesis | |
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| 495.17-497.24 Hypotheses for the Five Planets | |
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| 497.24-499.15 Unwinding Spheres Hypothesized | |
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| 499.16-501.21 Theorems on Homocentric Motion | |
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| 501.22-502.19 The Unwinding Spheres Explained | |
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| 502.19-504.3 The Total Number of Spheres | |
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| 504.4-15 A Lexical Coda | |
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| 504.16-505.19 The Failure of Homocentric Hypotheses | |
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| 505.19-506.8 The Early Theorists Excused | |
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| 506.8-16 The School's Proper Choice | |
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| 506.16-22 Ptolemy's Criticism | |
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| 506.23-507.8 Simplicius Puzzled | |
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| 507.9-508.16 Eccentric and Homocentric Hypotheses | |
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| 508.17-509.12 The Epicyclic Hypothesis | |
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| 509.13-510.35 Aristotle and the New Hypotheses | |
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| Figures | |
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| Comments | |
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| In de caelo 2.10 | |
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| Comment 10.01. De caelo 291a29-34: A Question of Proportionality | |
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| Comment 10.02. De caelo 291a29: �� ������ / � ����� | |
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| Comment 10.03. De caelo 291a30: �������� | |
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| Comment 10.04. De caelo 291b9-10: �� ����������� | |
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| Comment 10.05. In de caelo 471.1: “�������߿��” and Its Cognates | |
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| Comment 10.06. In de caelo 471.9: ����߿��� | |
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| Comment 10.07. In de caelo 471.11: �� ���� `ƿ������� | |
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| Comment 10.08. In de caelo 47L20: Larger Bodies Move Faster by Nature | |
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| Comment 10.09. In de caelo 472.5-7: The Two Planetary Motions Thus Far | |
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| Comment 10.10. In de caelo 472.13-14: ��������� … ߿���� ����� | |
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| Comment 10.11 In de caelo 473.15: A Lacuna? | |
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| Comment 10.12. In de caelo 473.26-27: Planetary Bodies as Hypostases | |
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| Comment 10.13. In de caelo 474.26-28: Planetary Eccentricity | |
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| Comment 10.14. In de caelo 475.2-4: On Linear and Angular Speed | |
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| Comment 10.15. In de caelo 475.11-12: An Emendation | |
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| In de caelo 2.11 | |
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| Comment 11.01. In de caelo 479.12: An Emendation | |
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| Comment 11.02. In de caelo 480.10-15: On Drum- or Lentil-Shaped Moons | |
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| Comment 11.03. In de caelo 480.17-19: The Shape of Eclipsing Bodies | |
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| Comment 11.04: In de caelo 480.19-21: On Flat or Convex Moons at Syzygy | |
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| Comment 11.05: In de caelo 480.21-23: Another Mistaken Argument | |
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| In de caelo 2.12 | |
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| Comment 12.01. De caelo 291b35-292a1: On 'Fewer Motions Than Some' | |
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| Comment 12.02. De caelo 292a3-6: Aristotle's Occultation of Mars | |
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| Comment 12.03. In de caelo 481.12-15: Ancient Records of Occultations | |
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| Comment 12.04. In de caelo 481.22-24: The Encouragement Offered | |
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| Comment 12.05. De caelo 292a18-21: The Heavenly Bodies Ensouled? | |
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| Comment 12.06. In de caelo 485.10-12: Fewer Motions: Better or Worse? | |
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| Comment 12.07. In de caelo 487.20-488.2: Awareness of Retrogradation | |
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| Plato, Timaeus 40c3-d3 | |
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| Plato, Respublica 617a4-b4 | |
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| The Planetary Turnings | |
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| Epinomis 986a8-987d2 | |
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| Epicurus, Epistula ad Pythoclem | |
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| Ptolemy, Alm. 12.1: Apollonius of Perga | |
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| Conclusion | |
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| Comment 12.08. In de caelo 488.20: Proclus on Sosigenes | |
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| Comment 12.09. In de caelo 488.21-24: On 'Saving the Phenomena' | |
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| Plutarch, De facie 923a | |
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| Archimedes, Arenarius 1.4-7 | |
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| Seneca, Nat quaest. 7.2.3 | |
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| Stobaeus, Ecl. 1.25.3k | |
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| Plutarch, Plat. quaest. 1006b-c | |
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| Geminus, Intro, ast. 1.19-22 | |
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| Conclusion | |
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| Comment 12.10. In de caelo 488.27-30: An Alternative Reading | |
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| Comment 12.11. De caelo 292b29-30: The Living Sources of Celestial Motion | |
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| Comment 12.12. In de caelo 493.15-17: The Third Solar Motion | |
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| Comment 12.13. In de caelo 494.9-12: An Error in the Solar Hypothesis? | |
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| Comment 12.14. In de caelo 494.20-22: The Length of the Day | |
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| Comment 12.15. In de caelo 495.5-8: On Latitude (������) | |
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| Comment 12.16. In de caelo 495.10-13: The Third Lunar Motion | |
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| Comment 12.17. In de caelo 495.13-16: An Error in the Lunar Hypothesis? | |
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| Comment 12.18. In de caelo 495.23-29: Values for the Sidereal Periods | |
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| Comment 12.19. In de caelo 495-29: The Particle “���” | |
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| Comment 12.20. In de caelo 496.6-9: Values for the Synodic Periods | |
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| Comment 12.21. In de caelo 496.27-28: The Verb “���” | |
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| Comment 12.22. In de caelo 497-3: The Hippopede | |
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| Comment 12.23. In de caelo 497-24-504.3: The Unwinding Spheres | |
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| Comment 12.24. In de caelo 498.5-10: An Emendation | |
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| Comment 12.25. IR de caelo 502.10-11: Sosigenes: The Unwinding Spheres | |
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| Comment 12.26. In de caelo 504.24-25: Axistotherus | |
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| Comment 12.27. In de caelo 32.12-33.16: Simplicius versus Philoponus | |
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| Comment 12.28. In de caelo 504.28-29: The Size of Venus and Mars | |
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| Comment 12.29. In de caelo 504.29-30: Shadows Cast by Venus | |
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| Comment 12.30. In de caelo 504.30-32: The Size of the Moon | |
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| Comment 12.31. In de caelo 504.33: Moerbeke: The Digression | |
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| Comment 12.32. In de caelo 504.33-505.1: The Ancient Digit (��������) | |
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| Comment 12.33. In de caelo 505.11-17: An Invisible Variation in Size | |
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| Comment 12.34. In de caelo 505.21-23: Homocentric Hypotheses: A History | |
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| Comment 12.35. In de caelo 506.2: Who Cares about the Number of Spheres? | |
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| Comment 12.36. In de caelo 506.11-15: Callisthenes and Aristotle | |
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| Comment 12.37. In de caelo 506.16: Simplicius on Ptolemy | |
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| Comment 12.38. In de caelo 506.22: Herophilus and the Nervous System | |
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| Comment 12.39. In de caelo 507.12-14: Simplicius and the Pythagoreans | |
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| Bibliography | |
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| Index of Passages | |
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| Passages in I.G. Kidd 1988-1999, vol. 1 | |
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| Index of Names | |
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| Index of Subjects | |