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UNIVERSITY OF MISSOURI STUDIES 



intensities would not be exactly the same as those in the first 

 case. That is, difference of phase may be irrelevant, but it 

 need not be so. Let us recall, however, that our representa- 

 tion is only a rather remote approximation to the actual 

 movements of the partition, so that actually the influence of 

 phase upon the perception may be other than it here appears 

 to be. What is important is our insight into the possibility 

 of a slight influence of this kind. 



Fig. 16. Compare figure 14 



I promised to demonstrate that the application of our the- 

 ory yields the same result if we read the curve of stirrup move- 

 ment from the right to the left, or turn it 

 upside down. The former case is illus- 

 trated by figure 16, which is exactly like 

 figure 14 when read from the right to the 

 left. Figure 17 shows the successive posi- 

 tions of the partition. At B the twenty- 

 four initial sections are down. At C the first eleven of them 



Theoretic irrel- 

 evance of the 

 sign of the co- 

 ordinates 



