CONTENTS 



CHAPTER PAGE 



I. SCIENCE AT THE BEGINNING OP THE CENTURY ... 1 



II. THE CENTURY'S PROGRESS IN ASTRONOMY 44 



III THE CENTURY'S PROGRESS IN PALEONTOLOGY .... 88 



IV. THE CENTURY'S PROGRESS IN GEOLOGY . 123 



-V. THE CENTURY'S PROGRESS IN METEOROLOGY .... 157 

 VI. THE CENTURY'S PROGRESS IN PHYSICS. THE "IMPON- 

 DERABLES" 192 



VII. THE ETHER AND PONDERABLE MATTER 230 



VIII. THE CENTURY'S PROGRESS IN CHEMISTRY 252 



IX. THE CENTURY'S PROGRESS IN BIOLOGY. THEORIES OP 



ORGANIC EVOLUTION 288 



X. THE CENTURY'S PROGRESS IN ANATOMY AND PHYSI- 

 OLOGY 321 



XI. THE CENTURY'S PROGRESS IN SCIENTIFIC MEDICINE . 354 

 XII. THE CENTURY'S PROGRESS IN EXPERIMENTAL PSYCHOL- 

 OGY 395 



XIII. SOME UNSOLVED SCIENTIFIC PROBLEMS 433 



i. SOLAR AND TELLURIC PROBLEMS 435 



ii. PHYSICAL PROBLEMS 443 



m. LIFE PROBLEMS 449 



INDEX ,459 



