Response in the Living and Non-Living

by Jagadis Chandra Bose

Fig. 89.—Stimulating Action of Na₂CO₃ on Tin

I first give a record of the stimulating action of sodium carbonate on tin, which will become evident by a comparison of the responses before and after the introduction of Na₂CO₃ ([fig. 89]). The next record shows the effect of the same reagent on platinum ([fig. 90]).

Fig. 90.—Stimulating Action of Na₂CO₃ on Platinum

Action of depressants.—Certain other reagents, again, produce an opposite effect. That is to say, they diminish the intensity of response. The record given on the next page ([fig. 91]) shows the depressing action of 10 per cent. solution of KBr on tin.

Fig. 91.—Depressing Effect of KBr (10 per Cent.) on the Response of Tin