A. SMI 



Pl,ATE I. 



\ 



\ 



\\\W 



m\ 





iiiiryiiililiW^nrr^nwinmm 



^'^' 3 cm. long of a diameter of 3 mm. not sealed in. Solution 

 -nent in fig. 1. Potential measured 1.5 cm. from the bottom. 

 38—43 milli-ampère cm-. 1 period 2.7 seconds. 



.'hm 



^'ii 



u 



Fig. 



Ti. long of a diam. 

 )tential measured 

 nt density 30—34 

 iod 2.2 seconds. 



F'ig. 5a. Electrode, solution and 

 arrangement siphon for potential 

 measurement as in fig. 5. Current 

 density 28—32 milli-ampère/cm^. 



^ • -^ ^ O, r' 



J J ^ J y^ 'J y^ '■' 





iution as in fig. 5. Potential measured 1 mm. under the 

 i-rent density 47—53.5 milli-ampère/cm^. 1 period 



^^^' \. long of a diameter of 3 mm. electrode spirally wound 

 kential measured at the second winding from the top. 

 ■rent regularly periodical at ± 0.5 ampère. 



