24 



Mr. 0. J. Lodge. Experiments on 

 FIG. 14. 



[Juiie 4, 



thin copper and thin iron round room, and 1, 2, 3 are three alterna- 

 tive positions of a universal discharger, while A are the knobs of a 

 Voss machine. Spark lengths are given in inches, but there is no 

 importance in their absolute values. 



26. Next day I went on with these observations, replacing the 

 liquid resistance W (which was useless) by a wire, and ordinarily 

 using two jars in series instead of one, connecting their knobs one to 

 each wire (more nearly as shown in fig. 15), and connecting their 

 outer coats together and roughly to the earth by standing them on 

 the same sheet of tinfoil on a wooden table. And because the knobs 

 of machine and of discharger were not the same size, they were first 

 compared by letting an ordinary discharge choose between them. 

 They offered equally good paths when A = 0'45, C = 0'54 inch. 

 The discharger was put in one or other of two positions : bridging 



