FUTURE ANALYSIS OF MEi\fORY 295 



number of revolutions is often the same as the num- 

 ber of verses. If we assume that in thinking the 

 poem the respiratory innervations which follow the 

 rhythm can be represented as harmonic curves, and 

 that the same holds good for the innervations which 

 are responsible for the turning of the wheel, it follows 

 from these facts that harmonic processes of inner vation 

 occurring simultaneously affect each other in such a 

 way that the periods of both processes are either equal 

 or in the ratio of simple multiples of each other. 1 1 

 requires great determination to withstand this law. I 

 consider it possible that where this succeeds the de- 

 viation from the law is only apparent, not real. In 

 reality it might be possible that one of the two har- 

 monic processes was stopped temporarily. The facts, 

 however, suffice to show that two harmonic processes 

 of innervation for different parts of the body, occur- 

 ring simultaneously, influence each other and are most 

 liable to form processes of equal period. 



The same is true not only for two or more simulta- 

 neous processes of motor innervation, but also for 

 simultaneous sensory processes and motor innerva- 

 tions, as is proved by dancing. The rhythm of the 

 music and the period of the motor innervations of the 

 legs and body coincide. 



3. A priori it would follow from these facts that 

 two simultaneous aperiodic processes will in general 

 interfere with or inhibit each other. That this is to 

 a certain extent true is shown by the experience that 

 we cannot do two things well at the same time. We 



