ELEMENTS OF 

 GENERAL SCIENCE 



BY 

 OTIS WILLIAM CALDWELL, PH.D. 



PROFESSOR OF EDUCATION AND DIRECTOR OF THE LINCOLN SCHOOL 

 OF TEACHERS COLLEGE, COLUMBIA UNIVERSITY 



WILLIAM LEWIS EIKENBERKY 



ASSISTANT PROFESSOR OF EDUCATION, IN CHARGE OK TRAINING OF 



TEACHERS OF GENERAL SCIENCE AND BIOLOGY 



UNIVERSITY OF KANSAS 



REVISED EDITION 



GINN AND COMPANY 



BOSTON NEW YORK CHICAGO LONDON 

 ATLANTA DALLAS COLUMBUS SAN FRANCISCO 



