14 CONTENTS. 



BOOK II. 



HISTORY OF THE PHYSICAL SCIENCES IN ANCIENT 



GREECE. 



Page 



Introduction 95 



Chapter I. — Earliest Stages of Mechanics and 

 Hydrostatics. 



Sect. 1 . Mechanics 96 



Sect. 2. Hydrostatics 98 



Chapter II. — Earliest Stages of Optics 100 



Chapter III. — Earliest Stages of Harmonics 105 



BOOK III. 



HISTORY OF GREEK ASTRONOMY. 



Introduction Ill 



< Jhapter I. — Earliest Stages of Astronomy. 



Sect. 1 . Formation of the Notion of a Year 112 



Sect. 2. Fixation of the Civil Year 113 



Sect. 3. Correction of the Civil Year (Julian Calendar) 117 



Sect. 4. Attempts at the Fixation of the Month 118 



Sect. 5. Invention of Lunisolar Years 120 



Sect. 6. The Constellations 124 



Sect. 7. The Planets 126 



Si ct 8. The Circles of the Sphere 128 



Sect. 9. The Globular Form of the Earth 132 



Sect. 10. The Phases of the Moon 134 



Sect. 11. Eclipses 135 



Sect 1 2. Sequel to the Early Stages of Astronomy 136 



Chapter II. — Prelude to the Inductive Epoch of 



Hipparchus 138 



