172 PRINCIPLES OF GENERAL PHYSIOLOGY 



electrolyte under any circumstances. Evidence that this is so will be given 

 presently. The theory is that known as the "electrolytic dissociation theory," 



Fu;. 52. PORTRAIT OF AKKMKMIS. 



(From a photograph by A. Jouason, fiiiteborg. ) 



which plays so large apart in science at the present day. A portrait of Arrhenius 

 is given in Fig. 52. 



Arrhenius had already suggested naming those molecules which take part in 

 the passage of an electrical current, and whose ions are independent of one another 

 in their movements, "active," and those whose ions are firmly combined together 

 " inactive," and in his classical paper, " Ueber die Dissociation der im Wasser 



