Vol. LXX. No. 4 APRIL, 1907 



THE 



POPULAR 



MONTHLY. 



EDITED BY J. McKEEN CATTELL 



CONTENTS 



Pioneers of Science in America : 



Benjamin Franklin : Dr. S. Weir Mitchell. Alexander von Humboldt : Baron Speck 

 von Sternberg. John James Andnbon : Dr. C. Hart Merriam. John Torrey : Dr. N. 

 L. Britton. Joseph Henry : Dr. Robert S. Woodward. Louis Agassiz : The Rev. 

 Ed-ward Everett Hale. James Dwight Dana : President Arthur T. Hadley. Spencer 

 Fullerton Baird : Dr. Hugh M. Smith. Joseph Leidy : Professor William Keith 

 Brooks. Edward Drinker Cope : Professor Henry Fairfield Osborn 291 



Notes on Development of Telephone Service : Feed DeLand . . . .317 

 The General Economic Importance of Mosquitoes : Professor John 



B. Smith 325 



How shall the Destructive Tendencies of Modern Life be met and over- 

 come ? : Dr. Richard Cole Newton 330 



The Value of Science : M. H. Poincare 336 



A Defence of Pragmatism : Professor William James 351 



Civology — A Suggestion : Professor Lindley M. Keasbey 365 



The Reclamation of the North Platte Valley : W. S. Coulter .... 372 



Shorter Articles : 



A Vocabulary Test : E. H. Babbitt 378 



The Progress of Science : • 



A National Department of Health ; The Research Departments of the Carnegie Insti- 

 tution ; The Sage Foundation ; The Problems of Astronomy ; Scientific Items . .379 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YORK: Sub-Station 84 

 Single Number, 30 Cents Yearly Subscription, $3.00 



Copyright, 1907, by THE SCIENCE PRESS 



