A TEXTBOOK IN 



GENERAL SCIENCE 



AND THE 

 ECONOMICS OF DAILY LIFE 



BY 



HERBERT BROWNELL, B. Sc. 



PROFESSOR OF SCIENCES IN SECONDARY EDUCATION, TEACHERS COLLEGE, 



UNIVERSITY OF NEBRASKA, LINCOLN; AUTHOR OF "LESSONS IN 



PHYSICS", "LESSONS IN CHEMISTRY", AND "LABORATORY 



LESSONS IN GENERAL SCIENCE" 



WITH 118 ILLUSTRATIONS 



PHILADELPHIA 



P. BLAKISTON'S SON & CO. 



1012 WALNUT STREET 



