CBe Popular Science lHombly 



The Contents of the March Number include the fol- 

 lowino- articles: 



Aerial Navigation, O. Chanute. 



The Metric System: Shall It be Compul- 

 sory? Professor W. Le Conts Stevens. 



The Conservation of Energy In Those of 

 Advancing Years. Dr. J. Madison Taylor. 



The Royal Prussian Academy of Science, 

 Berlin. Edward F. Williams. 



The Tropical Station at Cinchona, Jamaica* 

 Dr. N. L. Britton. 



Education and Industry. Professor Edw. 

 D. Jones. 



Evolution Not the Origin of Species. O. F. 

 Cook. 



Some Historical Aspects of Vegetarianism, 

 Professor Lafayette B. Mendel. 



Tokyo Tolkoka Dragaku (The Imperial Uni- 

 versity of Tokyo). Nachide Yatsu. 



The Poi'llar Scsenck Monthly has had few rivals and no equal In the 

 educative service it has done for the American people. A complete set of the 

 volumes thus far published is both a history of science for the period covered 

 and at the same time a pretty complete C3'clopedia of natural science. There is 

 jiothing tf) lill its place, and to carry it on is a benefaction to the jjublic. — W. T. 

 IIakui.s, \J. S. Commissioner of Education. 



The Popular Science Monthly, 



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