INORGANIC RESPONSE II5 
of the positive effect. (+) 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). 

(a) (>) (c) 
Fic. 67.—Nraative, DrpHastc, AND Positive Resuurant 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 Na,CO; remain for a time. If the reagent is 
previously applied to an area and the traces of the 
|e?) 
