Vol. LXVI. No. 1 NOVEMBER, 1904 



THE 



POPULAR SCIENCE 

 MONTHLY. 



EDITED BY J. McKEEN CAT TELL 

 CONTENTS 



The International Congress of Arts and Science. Wm. Harper Davis. 5 



"O 



Illustrated with portraits of Waldeyer, Picard, Moore, Maschke, Clarke, Jordan, 

 Osborn, Scott, Woodward, Rotch, Arrhenius, Ostwald, Boltzmann, Loeb, Hoffding, 

 Ward, Mitsukuri, Wiesner, Miiusterberg and other speakers and officers of the 

 Congress. 



Addresses given at the International Congress of Arts and Science: 



Present Problems of Inorganic Chemistry. Sir William Ramsay . 33 



The Light of the Stars. Professor E. C. Pickering 46 



The Fundamental Concepts of Physical Science. Professor Edward 



L. Nichols 56 



The Methods of the Earth Sciences. Professor T. C. Chamberlin . 65 



Utilitarian Science. President David Starr Jordan 76 



The Evolution of the Scientific Investigator. Professor Simon 



Newcomb 93 



The Progress of Science : 



The International Congress of Arts and Science ; The Louisiana Purchase Exposition J • 



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