1 86 RESPONSE IN THE LIVING AND NON-LIVING 



exactly similar phenomenon in plants and metals, where 

 successive responses to equal stimuli exhibited an 



FIG.. 114. ' STAIRCASE ' IN MUSCLE, PLANT, AND METAL 



increase, apparently by a gradual removal of molecular 

 sluggishness (fig. 114). 



Before After Before After 



FIG. 115. INCREASED KESPONSE AFTER CONTINUOUS STIMULATION IN NERVE 



AND METAL 



The normal response in animal tissue is represented ' down,' in metal ' up.' 



Increased response after continuous stimulation. 



An effect somewhat similar, that is to say, an in 

 creased response, due to increased molecular mobility, 



