vi CONTENTS 



PAOK 



The Coal-Tar Dye Industry, Its Wonderful Rise and 



Importance 124 



Natural and Artificial Perfumes 131 



MAX HEIM 



Scientific Developments in the Glass Industry 141 



R. SCHALLER 



What Electrochemistry is Accomplishing 148 



JOSEPH W. RICHARDS 



The Yeast Cell and its Lessons 169 



W. STANLEY SMITH 



The Chemical Regulation of the Processes of the Body 181 

 WILLIAM HENRY HOWELL 



The Science of Chemistry and its Development 195 



Selections from The New International Encyclopaedia 



The Age of Science 230 



IRA REMSEN 



The Old and the New Alchemy 245 



HERMANN KOPP 



Radioactivity 270 



MADAME CURIE 



Visible Molecules, Corpuscles and Ions. . . 279 



The Electronic Theory of Matter 286 



OLIVER LODGE 



The Ether of Space 290 



OLIVER LODGE 



Unsolved Problems of Chemistry 305 



IRA REMSEN 



Regarding Additional Reading 322 



THE EDITOR 



