INORGANIC RESPONSE 115 



of the positive effect, (b) The amplitude of vibration 

 of B is now slightly reduced, and we obtain the diphasic 

 effect, (c) The intensity of vibration of B is diminished 

 still further, and the negative effect is seen reduced to 

 a slight downward after-vibration, the positive up-curve 

 being now very prominent (fig. 67). 



(c) 

 FIG. 67. NEGATIVE, DIPHASIC, AND POSITIVE RESULTANT RESPONSE 



Continuous transformation from negative to positive 



I have shown the three phases of transformation, the 

 intensity of one of the constituent responses being 

 varied by altering the intensity of disturbance. 



In the following record (fig. 68) I succeeded in 

 obtaining a continuous transformation from positive to 

 negative phase by a continuous change in the relative 

 sensitiveness of the two contacts. 



I found that traces of after-effect due to the applica- 

 tion of Xa 2 C0 3 remain for a time. If the reagent is 

 previously applied to an area and the traces of the 



i 2 



