CONTENTS. 



CHAPTER XIII. 

 SCIENCE OF THE SEVENTEENTH CENTURY (CONTINUED). 



PAGB 



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 Ignor> 

 ant Assertion Willebrord Snellius discovers the Law of Re- 

 fraction, 1621 Explanation of this Law . . IOI 



CHAPTER XIV. 

 SCIENCE OF THE SEVENTEENTH CENTURY (CONTINUED). 



Fabricius Aquapendente discovers Valves in the Veins Harvey's 

 discovery of the Circulation of the Blood Discovery of the 

 Vessels which carry nourishment to the Blood Gaspard 

 Asellius notices the Lacteals Pecquet discovers the Passage 

 of the fluid to the Heart Rudbeck discovers the Lymphatics 108 



CHAPTER XV. 



SCIENCE OF THE SEVENTEENTH CENTURY (CONTINUED). 



Torricelli discovers the reason of Water rising in a Pump Uses 

 Mercury to measure the Weight of the Atmosphere Makes 

 the First Barometer M. Perrier, at Pascal's suggestion, de- 

 monstrates variations in the pressure of the atmosphere Otto 

 Guericke invents the Air-pump Working of the Air-pump 

 Guericke proves the Pressure of the Atmosphere by the experi- 

 ment of the Magdeburg Spheres He makes the first Electrical 

 Machine Foundation of Royal Society of London and other 

 Academies of Science * . . . .114 



CHAPTER XVI. 

 SCIENCE OF THE SEVENTEENTH CENTURY (CONTINUED). 



Boyle's Law of the Compressibility of Gases This same Law dis- 

 covered independently by Marriotts Hooke's theory of Air 



