Thin Metal Partition in a Voltameter. 195 



Table III. {continued). 



Time in 1 x 3 5< 10> 20# 3(X 45. 60 75 100# 150 2 20. 



minutes. J 



% 2 platinum. No visible gas. 

 x 0-97 1-02 ... 1-07 1-09 1-10 111 



Same, current reversed. 

 x 0-96 1-02 1-06 ... Ill 1-12 1-13 



# gold. Oxidized. Gas. 

 x 2-14 225 ... 2-34 245 248 253 ... 255 



Same, current reversed. 

 x 1-94 ... 2-06 214 2-17 2-19 225 2-27 2-28 



% 4 gold. Gas, until the plate was eaten away by oxidation to a thin film, the 

 oxide fell off, and polarization ceased. 



x 2-37 2-43 2-49 2-55 2-63 2-66 2-70 2*54 ... 2-41 2-27 000. 



Fresh solution, 30 per cent. H 2 S0 4 . 



Time in J L g 5 la 2Q 3a 45 6Q 75 1()a 15Q 22Q 



minutes. J 



#1 platinum. 

 x 2-17 2-34 2-43 2-53 268 ... 285 2-92 



Same, current reversed. 

 x 1-98 2-10 216 230 2'42 2-53 2-73 2-87 



#5 platinum. 

 x 2-37 2-45 2-53 2*65 2'74 2-83 290 



Same, current reversed. 

 x 1-99 2-08 2-12 2-24 2-59 263 2-67 2-68 



#3 Pt, #7 Au, and #2 Al, no polarization, so no time-change. 



Solution, NaOl; sp. gr. = l'09 ; ^ = 6*24 ohms. 



Timein 1 h 3 ^ 1Q> ^ 

 minutes, J 



#2 platinum. Gas. 

 x 2-97 ... 3-34 3-34 3-34 



NaCl; sp. gr. = l*12 ; v = 5'5 ohms. 



Thne f in \ 1. 3. 5. 10. 20. 

 minutes. J 



(4 platinum. Gas. 

 x 3-51 356 3«67 3*71 3'72 



