1880.] 



The Chloride of Silver Battery. 



565 



essentially of two disks, 31 inches diameter, placed 0'13 inch apart. 

 The capacity of this apparatus,, when used as an air-condenser, was 

 determined, and found to be 0-000058 mi. With 3,600 cells no 

 discharge took place, and it merely charged up as a condenser. The 

 deflection produced, when the keys e and / were pressed down, was 

 (without shunt) 150 divisions, still to the left. It is evident, therefore, 

 that the direction of the deviation throws no light on the question, for 

 it is the same with the voltameter as with the condenser. 



Fig. 2. 



Tube 73, containing a residuum of acetylene, was now substituted 

 for the air-condenser; it is 26*5 inches long and 1*5 inch diameter, the 

 distance between the terminals 23 inches ; this tube was connected with 

 3,600 cells, current 0' 00681 W. The tube potential was found to be 

 2,980 cells, and its resistance 449,500 ohms. On pressing down the 

 springs e and/, so as to break connexion with the battery and connect 

 the tube with the galvanometer, there was a deflection of 11 divisions 



to the left, the same as before. The current was only — — _ 



J 1874x1,000,000 



170,000,000 



w. 



2r2 



