NEW-WORLD SCIENCE SERIES 



Edited by John W. Ritchie 



COMMON SCIENCE 



by 

 Carleton tf^. Washburne 



Superintendent of Schools, Winnetka, Illinois 



Formerly Supervisor in Physical Sciences and 



Instructor in Educational Psychology 



State Normal School 

 San FranciscOy California 



ILLUSTRATED 



WITH PHOTOGRAPHS AND 

 DRAWINGS 



Tonkers-on- Hudson, New Tork 



WORLD BOOK COMPANY 



1920 



