The Popular Science Monthly 



Entered in the Post Offlce in Lancaster, Pa., as second-class matter. 



CONTENTS OF THE APRIL NUMBER 



On the Need of Administrative Changes In the Ameri- 

 can University. Professor George T, Ladd. 



Science in the Service of Highway Construction. Dr. 

 Clifford KichardBon. 



The Brooklyn Botanic Garden. Dr, C. Stuart Gager. 



Alexander von Humboldt. Dr. Edward F. Williams. 



A Review of Three Famous Attacks upon the Study 

 of Mathematics as a Training of the Mind. Pro- 

 fessor Florian Cajori. 



The Bed Sunflower. Professor T. D. A. Cockerell. 



The Medical Side of Immigration. Dr. Alfred G . Reed. 



Ancient Portals of the Earth. Professor James Perrin 

 Smith. 



Ptomaines and Ptomaine Poisoning. Dr. Edwin 

 LeFevre. 



Science and International Goodwill. J. McKeen 

 Cattell. 



The Progresi of Science : .. ,. ,„ . 



The Rockefeller Institute for Medical Research ; 

 Exploration and Adventure in the Antarctic; 

 Scientific Items, 



CONTENTS OF THE MAY NUMBER 



The Kinetic Theory of Matter and the Atomic Theory of 

 Electricity. Professor Robert Andrew Millikan. 



University Education in China. Professor Thomas T. 

 Read. 



Precession : and the Pyramids. Dr. Percival Lowell. 



New York's Ten Thousand. William J. Roe. 



Assortative Mating in Man. Dr. J. Arthur Harris. 



The Price Fallacy of High Costs. Dr. Ralph H. Hess. 



A Bugbear of Reformers. Professor T. N. Carver. 



Research in Medicine. Professor Richard M. Pearce. 



The Progress of Science : 



The Centenary of the Academy of Natural Sciences 

 of Philadelphia ; Deaths among American Men of 

 Science ; Scientific Items. 



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