32 ROYAL SOCIETY OF CANADA 






P. D. in volts. Defi. of Galv. in mms. 4 Deflection. 
Voltage. 
26 97 -200 
52 115 -206 
104 470 -208 
156 1,150 -217 
208 2,178 994 
312 4,540 216 
364 6,120 O45 
468 10,340 ‘27 
624 18,800 919 

Suitable shunts to galvanometer were employed for the larger cur- 
rents. In the third column is given the value of the square root of the 
deflection divided by the P. D. in volts. This should be a constant if the 
current is proportional to the square root of the voltage. The above 
results show that this is very approximately the case. The interpreta- 
tion of the results for lower voltages is complicated by the P. D. between 
terminals of platinum plate due to the passage of the current through it. 
Plates 3 cms. apart. 





P. D. in volts. Deflection. A/ Deflection. 
Voltage. 
52 15 074 
104 63 ‘076 
156 142 ‘076 
208 267 ‘078 
312 667 “080 
468 1,466 -082 
624 2,690 083 

In both these cases, the deflection increases slightly more rapidly 
than the square of the P. D. This is probably due to the fact that the 
ions increase in size and thus diminish in velocity the longer the time 
taken to travel between the electrodes. The results obtained for dis- 
tances up to 8 cms. are similar to those given above. 

