12 C. A. Chant— Variation of Potential along the 



cases are not so smoothly formed and are not considered in the 

 calculation of the means given in Table II. The mean of the 



three means given in the Table is 188'5 cms , which I take to be 

 quarter-wave-length of the condenser circuit oscillation. 



The curves obtained with disposition D, shown in tig. 9, 

 differ somewhat from the others. Here the variation of poten- 

 tial at the end joined to the transformer is almost as great as 



