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 Copemican 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, 1 561-1626 — 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, 1 62 1 — Explanation of this Law . . . . .103 



