1340 
Oxalic acid and iodine. 
Quality of light 
Time of 
exposure 
Amount of 
iodine added 
Unchanged 
' iodine 
i 
I 
1 Volume of Solution 
1 
1) Sunlight 
210' 
0.00635 
0.00379 
N 
j 50 c.c. ÏQ oxalic acid and 
Darkness 
210' 
0.00635 
0.C0482 
1 5 c.c. iodine. 
2) Sunlight 
360' 
0.01270 
0.00693 
j 50 c.c. ^ oxalic acid and 
Darkness 
360' 
0.01270 
0.00921 
1 10 c.c. iodine. 
3) Diffused light 
420' 
0.0C635 
0.00365 
J 50 c.c. ^ oxalic acid and 
Darkness 
420' 
0.00635 
0.00407 
i 5 c.c. ~ iodine. 
4) Diffused light 
520' 
0.01270 
0.00785 
} 50 c.c. ^ oxalic acid and 
Darkness 
520' 
0.01270 
0.00861 
i 10 c.c. ~ iodine. 
Malonic acid 
and iodine. 
1) Sunlight 
240' 
0.00635 
0.00483 
1 N' 
1 50 c.c. malonic acid 
1 ^ 
Darkness 
240' 
Do 
0.00565 
] and 5 c.c. iodine. 
2) Sunlight 
420' 
Do 
0.00285 
Do 
Darkness 
420' 
Do 
0.00372 
1 
3) Diffused light 
480' 
Do 
0.00245 
Do 
Darkness 
480' 
Do 
0.00288 
4) Diffused light 
560' 
Do 
0.C0201 
Do 
Darkness 
560' 
Do 
0.00246 
i 
Sodium malonate and iodine. 
1) Sunlight 
180' 
0.00635 
Darkness 
180' 
Do 
2) Sunlight 
320' 
Do 
Darkness 
320' 
Do 
3) Diffused light 
360' 
Do 
Darkness 
360' 
Do 
4) Diffused light 
520' 
Do 
Darkness 
520' 
Do 
0.00134 
0.00526 
0.00C65 
0.00269 
0.00148 
0.00251 
0.00102 
0.00199 
50 c.c. “ sodium malo- 
nate and 5 c.c. iodine 
Do 
Do 
Do 
