CONTENTS. 19 



BOOK YII. 

 fflSTORY OF PHYSICAL ASTRONOMY. 



Page 



Chapter I. — Prelude to the Inductive Epoch of New- 

 ton 385 



Chapter II. — The Inductive Epoch of Newton. — Dis- 

 covery of the Universal Gravitation of Matter, 

 according to the Law of the Inverse Square of 



the Distance 399 



1. Sun's Force on Different Planets .' 399 



2. Force in Different Points of an Orbit 400 



3. Moon's Gravity to the Earth 402 



4. Mutual Attraction of all the Celestial Bodies 406 



5. " " " Particles of Matter 411 



Reflections on the Discovery 414 



Character of Newton 416 



Chapter III. — Sequel to the Epoch of Newton. — 

 Reception of the Newtonian Theory. 



Sect. 1. General Remarks 420 



Sect. 2. Reception of the Newtonian Theory in England 421 



Sect. 3. " " " " Abroad 429 



Chapter IV. — Sequel to the Epoch of Newton, continued. 

 Verification and Completion of the Newtonian Theory. 



Sect. 1. Division of the Subject 433 



Sect. 2. Application of the Newtonian Theory to the Moon 434 



Sect. 3. " " " " " Planets, Satellites, 



and Earth 438 



Sect. 4. Application of the Newtonian Theory to Secular Inequalities 444 



Sect. 5. " " " " to the new Planets 446 



Sect. 6. " " " " to Comets 449 



Sect. 7. " " " " to the Figure of the Earth. 452 

 Sect. 8. Confirmation of the Newtonian Theory by Experiments on At- 

 traction 456 



Sect. 9. Application of the Newtonian Theory to the Tides 457 



Chapter V. — Discoveries added to the Newtonian Theory. 



Sect. 1. Tables of Astronomical Refraction 462 



Sect. 2. Discovery of the Velocity of Light. — Romer 463 



