The Popular Science Monthly 



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



CONTENTS OF FEBRUARY NUMBER 



Professor William H. Welch, Frontispiece. 



The Passing of China's Ancient System of Literary 

 Examinations. Dr. Charles Keyser Edmunds. 



The Lapses of Speech. Professor Joseph Jastrow. 



What is Slang? Professor Edwin W Bowen. 



Recent Advances in Meteorology an.1 Meteorological 

 Service in Japan. Dr. S. Tetsu Tamura. 



With the British Association in South Africa. Pro- 

 fessor Ernest W. Bkuvvn. 



Some Recent Tendencies in Mathematical Instruc- 

 tion. Professor G. A. Miller. 



The Wealth of the Commonwealth, its Consumption 

 and Conservation. Dr. A. C. Lane. 



The Honor System in American Colleges. Professor 

 W. Lb Conte Stevens. 



The Progress of Science : 



The Work of the Department of Agriculture 

 under Secretary Wilson ; The New Orleans Meet- 

 ing of the Association ; Scientific Items. 



CONTENTS OF MARCH 



NUMBER 



Professor 



Dr. 



The Physiography of the Adirondacks. 



James Fi'rman Kemp. 

 The Black Locust Tree and its Despoliation. 



Charles A. White. 

 A Contribution to the Theory of Science. Professor 



WlLHKLM OSTWALD. 



The Jewsharp. The late Dr. H. Carrington 



Bolton. 

 Geological History of Cockroaches. Dr. E. H. 



Sellards. 

 How Rooting Aquatic Plants Influence the Nutrition 



of the Food Fishes of Great Lakes. Professor 



Raymond Pond. 

 Urban and Rural Life. Frank T. Carlton. 

 Newspaper Football. Professor Edwin G. Dexter. 

 Submarine Navigation. Sir William H. White. 

 Trial and Error as a Factor in Evolution. Professor 



W. B. Pillsbury. 

 The Progress of Science : 



The Rewards of Scientific Research ; The Work 



of the Carnegie Institution ; Professor Adolf 



von Baeyer : 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 York City. 



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

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

 ning April, 1906. 



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

 risk), subscription for six months to THE POPULAR SCIENCE 

 MONTHLY, beginning April, 1906. 



Name. 



Address. 



Single Numbers 30 Cents Yearly Subscription, $3.00 



THE SCIENCE PRESS 



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



Sub-Station 84: NEW YORK 



O'Thi new ■>* Mm PriNtimo Oompaht 



