1113 
Oxalic acid and iodine. 
ee 
dl Time of | Amount of Unchanged | 
Quality of ligh Volume of Solution 
exposure (iodine added, iodine 
1) Sunlight 210’ | 0.00635 0.00379 | 50 cc. ® oxalic acid and 
Darkness 210° \ 0.00635 | 0.00482 | 5 ec. ‚op iodine. 
2) Sunlight 360° _0.01210 \ 0.00693 _}50 cc. N oxalic acid and 
Darkness 360 0.01270 < 0.00921 | 10 cc. {4 iodine. 
3) Diffused light 420’ 0.00635 | 0.00365 +] 50 cc. N oxalic acid and 
Darkness 420° 0.00635 0.004075 cc. ‚og iodine. 
4) Diffused light 520’ 0.01270 0.00785) 50 cc. ™ oxalic acid and 
Darkness | 520’ 0.01270 | 0.00861 { 10) c.c: x iodine. 
Malonic acid and iodine. 
1) Sunlight | 240’ | 0.00635 0.00483 H price: a atomho- acid 
| : 
Darkness | 240’ | Do ‚_0.00565 | BRE B odin 
2) Sunlight 420’ | Do | 0.00285 | a 
Darkness | 420’ Do 0.00372 | | 
3) Diffused light | 480’ Do | 0.00245 | A 
Darkness | 480’ Do 0.00288 
4) Diffused light | 560/ Do 0.00201 | i 
Darkness 560’ Do 0.00246 
Sodium malonate and iodine. 
1) Sunlight | 180’ | 0.00635 | 0.00134 
| 50sec: > sodium malo- 
Nis 
Darkness | 180 | Do 0.00526 | dees 
2) Sunlight 320’ Do 0.00065 |} ae 
Darkness | 320’ Do 0.00269 | 
3) Diffused light | 360 | Do 0.00148 | 
Darkness 360 =|) Do 0.00251 | a 
4) Diffused light! 520° | Do 0.00102 
Darkness 520’ Do 0.00199 | A 
| | 
(ph 
