FUTURE ANALYSIS OF MEMORY 297 



pressure alone (3, 4). It often occurs, however, that 

 the maximal pressure is obtained while reckoning. 

 In this case the experimenter certainly interrupted 

 his reckoning while pressing. This is shown by the 

 fact that in this case either the task is not solved cor- 

 rectly or the problem is entirely forgotten by the 

 subject experimented upon. It was a great excep- 

 tion if the maximal pressure was attained and the 

 task also solved correctly. The experiments result 

 quite differently, however, when the experimenter 

 first begins by pressing, and the problem is given 

 when the maximal pressure has already been reached, 

 so that it is only necessary to keep up the pressure. 

 In this case I noticed no, or only a very slight, in- 

 fluence of both activities : the person could reckon 

 correctly, although with effort, and the curve either 

 did not descend, or descended but little lower than 

 without the reckoning. 



Thus we see that a simultaneous, static innerva- 

 tion, no matter how strong, does not prevent the 

 reckoning ; that, on the other hand, a rapidly increas- 

 ing maximal motor innervation disturbs the process 

 of reckoning perceptibly. I have attempted to dis- 

 cover whether a sudden stoppage of motor innerv- 

 ation that is, a sudden relaxation of the statically 

 contracted muscles disturbs the process of reckon- 

 ing. This is not the case. 



Whatever may be the explanation of these phe- 

 nomena, we see that two simultaneous, maximal, 

 aperiodic processes of innervation which require an 



