1905 - 6 .] Electrolysis through Precipitation Films. 
455 
Chromic Hydroxide Films. 
1. Ammonium chloride. 
I mol. NH 4 C1 + i mol. NH 3 ; ± mol. NH 4 C1 + mol. CrCl 3 . 
I. 
II. 
III. 
IV. 
A 
•001811 
•001434 
79-2 
1774 
1417 
79*9 
1893 
1572 
83*0 
B 
1598 
1212 
75*9 
1637 
1345 
82*2 
1644. 
1452 
88*4* 
1677 
1412 
84*2 
C 
1611 
1378 
85*5* 
* 
1624 
1400 
86*2* 
1573 
1378 
87*6* 
1566 
1378 
88-0* 
Mean 
80-7 
2. Ammonium sulphate. 
i mol. (NH 4 ) 2 S0 4 + i mol. NH 3 ; J mol. (NH 4 ) 2 S0 4 + ^ mol. 
Cr 2 (S0 4 ) 3 . 
I. 
II. 
III. 
IY. 
B 
•000944 
•000516 
54-7 
1037 
500 
48-2 
916 
414 
45*2 
935 
454 
48*6 
929 
308 
33*2* 
C 
897 
455 
50-7 
921 
341 
37-0* 
1004 
471 
46-9 
950 
450 
47*4 
Mean 48*8 
