ACOUSTICAL ixvixrrcATrox OF THi: japan r,si: r.A:\riiO() im it. LM. 



TABLE III. 



Diameter of holes = 1. S cm. 



Distances of holes from the open end = 11.7, 21.7, )îl.7, 41.7, 

 and 51.7 cm. 



1 1 



o o 



49-8 



3-8 



40.1 



4.1 



For this value of the diameter of holes, the effect of a third 

 hole is almost insignificant. 



If the second hole be wider than the first, the rate of 

 diminution of a with the decrease of the distance between two 

 holes is greater than in the case where the two holes are of an 

 equal area. This is shown by the following table when compared 

 with Table I. 



