WORKS BY THE SAME AUTHOR. 



RESPONSE IN THE LIVING AND NON-LIVING. 



With 117 Illustrations, 8vo., los. 6d. 1902. 



PLANT RESPONSE: AS A MEANS OF PHYSIO- 

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COMPARATIVE ELECTRO - PPIYS 10 LOGY : 

 A PHYSICO-PHYSIOLOGICAL STUDY. With 

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