CONTENTS. 



PAGE 



draws up the Rudolphine Tables Galileo discovers the principle 

 of the Pendulum Calculates the velocity of Falling Bodies, and 

 shows why it increases Shows that Unequal Weights fall to the 

 Ground in the same time Establishes the relations of Force and 

 Weight Stevinus on Statics Summary of the Science of the 

 sixteenth century ........ 74 



CHAPTER XI. 



SCIENCE OF THE SEVENTEENTH CENTURY. 



Astronomical discoveries of Galileo The Telescope Galileo ex- 

 amines the Moon, and discovers the Earth-light upon it Dis- 

 covers Jupiter's four Moons Distinguishes the Fixed Stars from 

 the Planets The phases of Venus confirm the Copernican theory 

 Galileo notices Saturn's Ring, but does not distinguish it 

 clearly Observes the spots on the Sun The Inquisition force 

 him to deny the movement of the Earth Blindness and Death 

 of Galileo .......... 87 



CHAPTER XII. 

 SCIENCE OF THE SEVENTEENTH CENTURY (CONTINUED). 



Kepler the German Astronomer Succeeds Tycho as Mathema- 

 tician to the Emperor Rudolph His description of the Eye 

 He tries to explain the orbit of the planet Mars And by com- 

 paring Tycho's tables with observation discovers his First and 

 Second Law of the movements of the Planets His delight at 

 Galileo's discoveries Kepler's Third Law Comparison of the 

 labours of Tycho, Galileo, and Kepler 95 



CHAPTER XIII. 



SCIENCE OF THE SEVENTEENTH CENTURY (CONTINUED). 



Francis Bacon, 1561-1626 He teaches the true method of 

 studying Science in his 'Novum Organum' Rene Descartes, 

 1596-1650 He teaches that Doubt is more honest than Ignorant 

 Assertion Willebrord Snellius discovers the Law of Refrac- 

 tion, 1621 Explanation of this Law ..... 103 



