INORGANIC RESPONSE 109 



Possibly connected with this may be the increased 

 responses exhibited by the action of stimulants (figs. 89, 

 90). 



Reduction of molecular sluggishness attended (i) 

 by quickened recovery. Sometimes, after a cell has 

 been resting for too long a period, especially on cold 

 days, the wire gets into a sluggish condition, and the 

 period of recovery is thereby prolonged. But successive 

 vibrations gradually remove this inertness, and recovery 

 is then hastened. This is shown in the accompanying 

 curves, fig. 63, where (a) exhibits only very partial 



10 20 30 40 so Seconds 



FIG. 63 



(a) Slow recovery of a wire in a sluggish condition. 



(6) Quickened recovery in the same wire after a few vibrations. 



recovery even after the expiration of 60 seconds, 

 whereas when a few vibrations had been given recovery 

 was entirely completed in 47 seconds (b). There was 

 here little change in the height of response. 



Or (2) by heightened response. The removal of 

 sluggishness by vibration, resulting in increased mole- 

 cular mobility, is in other instances attended by in- 

 crease in the height of response, as will be seen from 

 the two sets of records which follow (fig. 64). Cold, 

 due to prevailing frosty weather, had made the wires in 

 the cell somewhat lethargic. The records in (a) were 



