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



A. The cylinder capacity used in the experiments with the 

 Braun transmitter was connected to the condenser circuit at a, 

 the length of the wire ab being 40 cms . Thus the length from 

 this capacity to the end D, of the antenna, was 40 + 75 = 115 cms . 



11 



B. The point a was joined to earth (the same as above), the 

 wire ab being 25 cms long. In this case the length of the con- 

 ductor between earth and D was 75 + 25 = 100 cms . 



C. To a was attached a wire precisely similar to that used 

 as antenna. Here the two wires were joined by 75 cms of the 

 condenser circuit. As before, the balancing wire was drawn 

 up in a vertical direction towards the ceiling. 



