Preface and Note by the Translator

I: On Rays Propagated in Straight Lines, Part 1

I: On Rays Propagated in Straight Lines, Part 2

II: On Reflexion

III: On Refraction, Part 1

III: On Refraction, Part 2

IV: On the Refraction of the Air

V: On the Strange Refraction of Iceland Chrystal, Part 1

V: On the Strange Refraction of Iceland Chrystal, Part 2

V: On the Strange Refraction of Iceland Chrystal, Part 3

V: On the Strange Refraction of Iceland Chrystal, Part 4

VI: On the Figures of the Transparent Bodies, Part 1

VI: On the Figures of the Transparent Bodies, Part 2