The Popular Science Monthly 



Entered in the Post Office tn LancatAer, Fa., as seoond-elass matter. 



CONTENTS OF APRiL NUMBER 



Chaules Robert Darwin 



Born February 12, 1809 



Life and Works of Darwin. Dr. Henry Fairfiele 



OSBORN. 



Tlie Individuality of Charles Darwin. Charles F. Cox. 



Darwin and Geology. Professor John James Steven- 

 son. 



Darwin and Botany. Dr. Nathaniel Lord Britton. 



Darwin and Zoology. Dr. Hermon C. Bumpus. 



For Darwin. Professor T. H. Morgan. 



Predarwinian and Postdarwinian Biology. Professor 

 William Morton Wheeler, 



The Halo of a Hundred Years. Professor R. M. Wenley. 



The Origin of the Theory of Natural Selection. Dr- 

 Alfred Eussel Wallace. 



The First Presentation of the Theory of Natural Selec- 

 tion. Sir Joseph Hooker. 



The Progress of Science: 



Darwin Manuscripts ; Portraits of Darwin ; Celebra- 

 tions in Honor of Darwin. 



CONTENTS OF MAY NUMBER 



The Type of the Panama Canal. C. E. Grunsky. 



Tariff Revision : 



From the Manufacturer's Standpoint. A. B. Far- 

 QXJHAR,,H. E. Miles. 



From the Importer's Standpoint. Francis E. Ham- 

 ilton. 



From the Consumer's Standpoint. Jesse E. Orton. 



A Permanent Tariff Bureau. Seymour E. Loomis. 

 Josiah Willard Gibbs and his Relation to Modern Science. 



Dr. Fielding H. Garrison. 

 On a Very Prevalent Abuse of Abstraction. Professor 



William James. 

 The Closing of a Famous Astronomical Problem. Pro- 

 fessor W. W. Campbell. 

 The Harpswell Laboratory. Max Morse. 

 The Progress of Science : 



The Research Work of the Carnegie Institution ; 



Lieutenant Shackleton's Antarctic Expedition; 



Two Great French Naturalists ; Scientific Items. 



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