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• Preface and Note by the Translator
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• I: On Rays Propagated in Straight Lines, Part 1
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• I: On Rays Propagated in Straight Lines, Part 2
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• II: On Reflexion
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• III: On Refraction, Part 1
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• III: On Refraction, Part 2
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• IV: On the Refraction of the Air
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• V: On the Strange Refraction of Iceland Chrystal, Part 1
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• V: On the Strange Refraction of Iceland Chrystal, Part 2
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• V: On the Strange Refraction of Iceland Chrystal, Part 3
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• V: On the Strange Refraction of Iceland Chrystal, Part 4
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• VI: On the Figures of the Transparent Bodies, Part 1
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• VI: On the Figures of the Transparent Bodies, Part 2
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