CONTENTS 



BOOK III 

 CHAPTER I 



THE SUCCESSORS OF NEWTON IN ASTRONOMY 



The work of Johannes Hevelius, p. 3 Halley and Hevelius, p. 

 4 Halley 's observation of the transit of Mercury, and his meth- 

 od of determining the parallax of the planets, p. 5 Halley 's ob- 

 :ion of meteors, p. 7 His inability to explain these bodies, 

 p. 10 The important work of James Bradley, p. n Lacaille's 

 measurement of the arc of the meridian, p. 13 The determination 

 of the question as to the exact shape of the earth, p. 14 D'Alem- 

 bert and his influence upon science, p. 15 Delambre's History of 

 Astronomy, p. 16 The astronomical work of Euler, p. 17. 



CHAPTER II 



THE PROGRESS OP MODERN ASTRONOMY 



ork nf William Hcrschel, p. 19 His discovery of Uranus, p. 



20 His discovery that the stars arc suns, p. 21 His conception 



of the universe, p. 24 His deduction that gravitation has caused 



rouping of the heavenly In -dies, p. 25 The nebulas hypnthc- 



25 Immanuel Kant's conception of the formation of the 



!. p. 26 Defects in Kant's conception, p. 30 Laplace's final 



>f the problem, p. 31 His explanation in detail, p. 



32 Change in the mental attitude of the world since Bruno, p. 



39 Asteroids and satellites, p. 40 Discoveries of Olbcrs, p. 



calculations of Adams and Levcm 



42 The disc*- 'lie inner ring <>f Saturn, p. 44 Cl< rk- 



stability of Saturn's rings, p. 45 Helm- 

 lon of th< lal friction, p. 49 Professor 



iii 



