viii CONTENTS. 



BOOK TWO. 



MATTER AND ENERGY. 



CHAPTER IV. 



A CENTURY OF CHEMISTRY. 



PAOB 



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. 



THE PROGRESS OF PHYSICS. 



Introductory. The Newtonian Foundation. Conservation 

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

 of Gases. Undulatory Theory of Light. Theory 

 of Electricity. Theories of Matter. Theory of the 

 Ether .. 131 



CHAPTER VI. 



ADVANCE OF ASTRONOMY. 



From Copernicus to Newton. Applications of the Gravita- 

 tion-Formula. The Study of the Stars. Extension and 

 Intensifying of Observation. Physical and Chemical 

 Problems. Spectrum Analysis. The Evolution-Idea in 

 Astronomy 179 



