The Popular Science Monthly 



Entered in the Pott Office in Lancaster, Pa., at teeond-elats matter. 



CONTENT8 OF APRIL NUMBER 



Pioneers of Science in America: 



Benjamin Franklin: Dr. S. Weir Mitchell. Alex- 

 ander von Humboldt: Baron Speck von Sternberg. 

 John James Audubon: Dr. C. Hart Merriam. 

 John Torrey: Dr. N. L. Britton. Joseph Henry: 

 Dr. Robert S. Woodward. Louis Agassiz: The 

 Rev. Edward Everett Hale. James Dwight Dana: 

 President Arthur T. Hadley. Spencer Fullerton 

 Baird: Dr. Hugh M. Smith. Joseph Leidy: Pro- 

 fessor William Keith Brooks. Edward Drinker 

 Cope: Professor Henry Fairfield Osborn. 



Notes on Development of Telephone Service. Fred 

 DeLand. 



The General Economic Importance of Mosquitoes : 

 Professor John B. Smith. 



How shall the Destructive Tendencies of Modern Life 

 be met and overcome? : Dr. Richard Cole 

 Newton. 



The Value of Science. Professor M. H. Poincare. 



A Defence of Pragmatism: Professor William James. 



Civology— A Suggestion: Professor Lindley M. 



TO PARR IT V 



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

 Coulter. 



Shorter Articles: 



A Vocabulary Test: E. H. Baebitt. 



The Progress of Science : 



A National Department of Health; The Research 

 Departments of the Carnegie Institution; The 

 Sage Foundation; The Problems of Astronomy; 

 Scientific Items. 



CONTENT8 OF MAY NUMBER 



The Jamaica Earthquake. Charles W. Brown. 



Notes on the Development of Telephone Service. 



Fred DeLand. 

 Sight and Seeing in Ancient Times. Professor Chas. 



W. Super. 

 The Classification of the Arts. Professor Ira How- 



erth. 

 The Value of Science. M. H. Poincare. 

 Is the Mind in the Body ? Professor George Stuart 



Fullerton. 

 Drug Abuses and their Effects on the People. Dr. J. 



Madison Taylor. 

 Illusions of Vision and the Canals of Mars. Professor 



Andrew Ellicott Douqlass. 



The Progress of Science : 



Berthelot and Moissan ; The Founders of the 

 Medical Department of the Johns Hopkins Uni- 

 versity ; The Directorship of the U. S. Geological 

 Survey ; Scientific Items. 



The MONTHLY will be sent to new subscribers for six months for One Dollar 

 SUBSCRIPTION ORDER 



To THE SCIENCE PRESS, 



Publishers of THE POPULAR SCIENCE MONTHLY, 

 Sub-Station 84, New Fork City. 



Please find enclosed check or money order for three dollars, subscrip- 

 tion to THE POPULAR SCIENCE MONTHLY for one year, begin- 

 ning June, 1907. 



Please find enclosed from, a new subscriber one dollar (sent at your 

 risk), subscription for six months U THE POPULAR SCIENCE 

 MONTHLY, beginning June, 1907. 



Name _. 



Address.. 



Singlo Numbers 30 Cents Yearly Subscription, $3.00 



THE SCIENCE PRESS 



GARRISON-ON-HUDSON, N. Y. 41 NORTH QUEEN ST., LANCASTER, PA. 



Sub-Station 84: NEW YORK 



Pniaa Of thi aaw ska PhiNtinq company 



