viii CONTENTS. 



BOOK TWO. 



MATTER AND ENERGY. 



CHAPTER IV. 



A CENTURY OF CHEMISTRY. 



Search for the Elements. Theory of Combustion and 

 the Conservation of Matter. The Atomic Theory. De- 

 velopment of the Atomic Theory. Development of 

 Organic Chemistry. The Periodic Law. Co-operation of 

 Chemistry and Physics. The Circulation of Matter. 

 Chemical Affinity 70 



CHAPTER V. 



THS PROGRESS OF 



Introductory- The Newtonian Foundation. Conservation 

 of Energy. Heat as a Mode of Action. Kinetic Theory 

 of Gases. Undulatory Theory of Li^ht. Theory 

 of Electricity. Theories of Matter. Theory of the 

 Ether.... ... 131 



CHAPTER VL 



ADVANCE OF ASTRONOMY. 



From Copernicus to Newton. Applications of the Gravita- 

 tion Formula. The Study of the Stars. Extension and 

 Inttmifying f Obnrvation. - Phy.ical and Chemical 

 Problem*. -Spectrum Analysis. -The Evolution Idea in 



Astronomy 179 



