68 COMPARATIVE ELECTRO-PHYSIOLOGY 



place, they were necessarily to be ascribed to opposite or 

 antagonistic chemical processes namely, of assimilation and 

 dissimilation. That this, however, cannot be universally true, 

 has here been proved by tracing the two effects to their 

 definite respective origins, in positive and negative turgidity- 

 variations. I shall enter into this subject in greater detail in 

 the subsequent chapters. 



