Shepard — New Solution for the Copper Voltameter. 53 



Series I. 



amperes 



Current Density = -02 5 — 



cm 2 

 No. Equivalent x 10 7 . 



1 _ 3287*2 



2.. 3295-0 



3 3288-4 



4 3288-9 



5 _ ---- 3292-8 



6 3297*2 



7 3286-8 



8 3288-4 



9 _ 3293-9 



10 __ 3289-4 



11 3287-2 



12 3293-4 



The mean of these values is 3290-7 with a probable error of 

 ±2*4 for a single observation. 



Series II. 



amp 



Current Density -03 £ 



J cm 2 



No. Equivalent x 10 7 . 



1 3288-4 



2.. 3291-7 



3 3296-7 



4.. 3291-7 



5 3292-8 



6 3288-3 



7_. .- 3295-5 



8 , 3295-9 



9. 3294-4 



10... 3287-2 



11... 3288-4 



12 .. 3288-9 



The mean of these values is 3291-7 with a probable error of 

 ±2- 3 for a single observation. 



Series III. 



Current Density -04 — v 

 cm 2 



No. Equivalent x 10 7 . 



1 3287-8 



2 _ 3294-4 



3... 3287-2 



4 3284-5 



5.. _ 3283-9 



6 _. 3283*4 



7 _ _. 3296-7 



8 3295-0 



9 3292-2 



10 3295-5 



11 __ 3296*1 



12 3296-7 



The mean of these values is 3291*1 with a probable error of 



±3'6 for a single observation. 



