CONTENTS 



Page 



The Unity of Science, by Arthur O. Love joy . . 1 

 Mathematics, by Earl R. Hedrick . . . . 37 

 Physics, by Oscar Milton Stewart . . . . 57 

 Chemistry, by William George Brown . . . .79 

 Astronomy, by Herbert Meredith Reese . . .105 

 Geology, by Curtis Fletcher Marbut . . . 125 



Botany, by C. Stuart Gager 149 



Experimental Zoology, by Winterton C. Curtis . .177 

 Evolutional Zoology, by George Lefevre . . . 205 



4001 9G 



