a is tab 
Formic acid and iodine. 
Quality of light. Pee epmmeuntery Cnebeneed | Volume of Solution. 
a) Sunlight | 300’ | 0.0635 | 0.00642 10 c.c. 3.87 normal formic 
Darkness | 300’ Do 0.00809 an and 5 c.c WY iodine. 
b) Sunlight | 180 | Do 0.00858 | 
Darkness | is ‘| Do 0.01023 | sip 
©) Diffusedlight| 180’ | __Do 0.00922 | 
Darkness | 180’ Do 0.01092 | | me ’ 
d) Diffusedlight| 820° | Do | 0.00175 | 
Darkness | 820’ Do 0.00201 | ne 
Ammonium oxalate and iodine. 
1) Sunlight | 180° 0.0635 | 0.00321 eN aon 
(feeble) | 5 
Darkness 180! 0.0635 0.04369 | tate and 5 cc. A iodine 
2) Sunlight | 300° | 0.1270 | 0.00823 ‘\50 ee Namen 
(feeble) | : | | | 5 
Darkness 300’ | (0.1270 \_ 0.09854 \ tate and 10 cc. iodine. 
3) Sunlight | 65 | 0.0635 | 0.00013 |) 59 eN ammonium oma: 
(bright) | 5 
Darkness bees 0.0635 0.05140 \\ late and 5 cc, hl iodine 
4) St aaa ais | 170 0.1270 0.01648 50 cc. À ammonium oxa- 
Darkness | 170 Barad el Owordenkl Nate aaa ables N iodine. 
5) Diffusedlight | 240° | 0.1270 | 0.02441 
Darkness | 240’ | 0.1270 | 0.05871 | i 
6) Diffused light | 190’ 0.0635 | 0.01452 | 50 cc. 2 ammonium 
Darkness | __190’ 0.0635 | 0.03985 |\late and 5 cc. * iodine 
Potassium oxalate and iodine. . 
1) Sunlight 60’ | 0.0635 0.00011 |) 90 Cc. 5 Pot. oxalate and 
Darkness | 60’ | 0.0635 0.05140 He Gc: 7 iodine. 
2) Sunlight 168’ 0.1270 | 0.01657 | ti oe 2 Potioxelate ant 
Darkness. … | 165 | 0.1270 | 0.09778 |) 10 ee. a AE 
3) Diffused light | 245’ Do | 0.02401 | a 
Darkness 245 Do 0. 05321 | 
4) Diffused light | 190’ 0.0635 0.01412) 50 cc. } Pot. oxalateand 
Darkness 190 0.0635 | 0.03925 | Bice iy iodine. 
