54 .Shepard — New Solution for the Copper Voltameter. 



Series IV. 



Current Density '05 — ~ 

 J cm 2 



No. Equivalent x 10 7 . 



1 _ ' 3286-2 



2._ _ 3286*2 



3 3290-5 



4 : 3293-4 



5 3288-4 



6 ... ._ - 3286-8 



7 _ 3297-2 



8 3292-8 



9._ _. 3285-5 



10____ _ 3287-2 



11 3286-8 



12 3293-4 



The mean of tins series is 3289'5 with a probable error of 

 ±2*6 for a single observation. 



Series V. 

 Current Density -06 — ^ 



cm 



No. Equivalent x 1 0'. 



1__ 3288-4 



2. 3294-4 



3 3287*2 



4 3290-0 



5 3292-8 



6 - 3290-5 



7 3291-7 



8 _ 3295-0 



9 3283-9 



10 _ 3287-2 



11 _ 3287-2 



12 3291-1 



The mean of these values is 3290-0 with a probable error of 

 :2*2 for a single observation. 



