1339 
Formic acid and iodine. 
Quality of light. 
Time of 
exposure. 
Amount of 
iodine added. 
Unchanged 
j iodine. 
Volume of Solution. 
a) Sunlight 
300' 
0.0635 
0.00642 
1 10 c.c. 3.87 normal formic 
Darkness 
300' 
Do 
0.00809 
1 acid and 5 c.c, ^ iodine. 
b) Sunlight 
180' 
Do 
0.00858 
Do 
Darkness 
180' 
Do 
' 0.01023 
c) Diffiised light 
180' 
Do 
0.00922 
Do 
Darkness 
180' 
Do 
0.01092 
d) Diffused light 
820' 
Do 
0.00175 
Do 
Darkness 
O 
CM 
00 
Do 
0.00201 
1 
Ammonium oxalate and iodine 
1 ) Sunlight 
(feeble) 
180' 
0.0635 
0.00321 
1 50 c.c. y ammonium oxa- 
Darkness 
180' 
0.0635 
0.04369 
) late and 5 c.c. ~ iodine. 
2) Sunlight 
(feeble) 
Darkness 
300' 
0.1270 
0.00823 
1 50 c.c. j ammonium oxa- 
300' 
0.1270 
0.09854 
) late and 10 c.c. ~ iodine. 
3) Sunlight 
ibright) 
Darkness 
65' 
0.0635 
0.00013 
1 50 c.c. y ammonium oxa- 
65' 
0.0635 
0.05140 
1 N 
1 late and 5 c.c. iodine. 
4) Sunlight 
(bright) 
Darkness 
170' 
0.1270 
0.01648 
) 50 c.c. y ammonium oxa- 
no' 
0.1270 
0.09772 
1 late and 10 c.c. iodine. 
5) Diffused light 
240' 
0.1270 
0.02441 
1 
Do 
Darkness 
240' 
0.1270 
0.05871 
i 
6) Diffused light 
190' 
0.0635 
0.01452 
1 50 c.c. y ammonium oxa- 
Darkness 
190' 
0.0635 
0.03985 
1 late and 5 c.c. iodine. 
Potassium oxalate and iodine. 
N 
1 50 c.c. - Pot. oxalate and 
1) Sunlight 
60' 
0.0635 
0.00011 
Darkness 
60' 
0.0635 
0.05140 
j 5 c.c. iodine. 
2) Sunlight 
165' 
0.1270 
0.01657 
N 
1 50 c.c. Pot. oxalate and 
Darkness 
165' 
0.1270 
0.09778 
1 ^ 
' 10 c.c. iodine. 
3) Diffused light 
245' 
. Do 
0.02401 
! Do 
Darkness 
245' 
Do 
0.05321 
t 
N 
1 50 c.c. - Pot. oxalate and 
4) Diffused light 
190' 
0.0635 
0.01412 
Darkness 
190' 
0.0635 
0.03925 
i 5 c.c. yq iodine. 
86 * 
