WORKS BY THE SAME AUTHOR. 



RESPONSE IN THE LIVING AND NON- 

 LIVING. With 117 Illustrations. Svo. 10s. 6^. 



1902. . 



ELECTRO-PHYSIOLOGY OF PLANTS. 



{To be published shortly.) 



LONGMANS, GREEN, \ CO., .59 Paternoster Row, Londc 

 N\w ^'ork and Bombay. 



