300 Electric Discharge with Chloride of Silver Battery. [June 14, 



two idle wires sealed in suitable positions in a tube, one of wbicli was 

 connected with earth, the other with the electrometer (fig. 11, 6). 

 The gases used were carbonic anhydride and hydrogen respectively. 

 As a mean of a great number of experiments it was found that when 

 a dark space was straddled, the potential being reckoned l,then when 

 a stratum was straddled, the potential was 1*243, 1*229. 



On testing two idle wires distant f inch (1*6 centims.) apart with a 

 Thomson galvanometer, the current in this fractional part of a tube 

 was found to go frequently in the reverse direction to that of the main 

 current, and when the galvanometer was connected to two idle wires 

 diametrically opposite, currents were indicated sometimes in one direc- 

 tion, sometimes in another across the tube (fig. 12). These experi- 



Fia. 12. 



1 2 3 



ments seem to indicate that there are eddies in the gas during a 

 discharge, as if the motion of the molecules conveying an electric 

 discharge was of an epicycloidal character. The authors conclude 

 by saying that it is possible that the eddies may be connected with 

 the production of strata. 



