Johnson—Electrolytic Production of Iodoform. 257 
Data: Effect of foreign substances on yield. 
h 2 o. 
Na 2 CC >3 
C 2 H 5 OH 
lOgKI Plus 
Yield of 
CHI 3 
Ampere 
hours. 
! 70g. 
4 c 
6 g. 
4 4 
4 4 
4 4 
t 4 
7.36g. KBr 
20 g. NaCl 
lOg. KCIO 3 
lOg. KCIO 4 
2.193g 
2.364 
2.393 
2.143 
! 
1.5 
l 4 
4 4 
Data: ( Curves , sheets 2 and S). 
H 2 0. 
Na 2 COs • 
C 2 H 5 OH. 
KI. 
chi 3 . 
Amp. 
hours. 
Alcohol 
eff. 
I 
Current 
eff. 
Chem. 
eff. 
Per cent. 
Per cent. 
Per cent. 
70g. 
6 g. 
40g. 
20 g. 
2.3Jg. 
1.5 
0.676 
31.5 
84.2 
4 4 
<« 
8 . 
“ 
2.46 
4 4 
3.61 
34.+ 
91. 
4 4 
< > 
4. 
“ 
2.45 
4 4 
7.2 
34. 
90.75 
4 4 
11 
2 . 
2.14 
4 4 
12.52 
29.8 
79.5 
4 4 
1 « 
0.2 
“ 
0.923 
4 4 
54.1 
12.78 
34.03 
4 4 
3. 
4 . 
4 4 
1.71 
4 4 
4 4 
4 75 
4 4 
4 4 
1 2.352 
4 4 
4 4 
6 . 
4 4 
4 4 
2.45 
4 4 
4 4 
9. 
4 4 
2.285 
4 4 
12 . 
4 4 
2.03 
4 4 
6 . 
4 4 
10 
2.294 
4 4 
4 l 
4 4 
15 
2.411 
4 4 
t ( 
4 4 
20 
2.450 
4 4 
1 1 
4 4 
30 
2.214 
4 4 
35 
(1 
4 4 
20 
4 4 
2.288 
4 4 
70 
,, 
4 4 
2.45 
4 4 
105 
4 4 
4 4 
2.191 
4 4 
140 
“ 
4 4 
“ 
2.005 
“ 
Note: It was found that the current density could be varied within very wide- 
limits without materially affecting the yield of iodoform. 
The temperature of the bath varied from 70° to 75°C. 
