18 ART. 10. — T. TEHADA. 



From tlie results of the experiments, we may infer generally that 

 the correction a for any one hole is diminished by making another 

 hole nearer the open end, and that the diminution increases with 

 the width of the second hole and with its approach to the first 

 hole. In Figs. 4, 5 and 6, the dotted lines give the value of 

 / when a similar hole is made at s cm. from the first opening. 

 It will be seen that for the diameter of holes =-1.8 cm., the effect 

 of the second hole is to make the curve a to — - almost parallel 

 to the axis of -j-. 



The correction a diminishes almost uniformly with the decrease 

 of the distance separating the two holes ; and the rate of the 

 diminution increases with the diameter of the second opening or 

 with the number of farther openings if such be present ; but it 

 is nearly independent of the distance of the first opening from 

 the open end. The relation may be seen from the following 

 tables : — 



