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 (1) 
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 50 Seconds 
Fic. 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 
slugeishness 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 
