1341 
Lactic acid and iodine. 
Quality of light 
Time of 
exposure 
Amount of 
iodine added 
Unchanged 
' iodine ! 
1 
Volume of solution 
1) Sunlight 
300' 
0.00635 
0.00519 
i N 
1 50 c.c. lactic acid 
Darkness 
300' 
Do 
0.00595 
1 N 
1 and 5 c.c. iodine. 
2) Sunlight 
340' 
Do 
0.00501 
Do 
Darkness 
340' 
Do 
i 0.00570 
i 
3) Diffused light 
360' 
Do 
0.00525 
1 Do 
Darkness 
360' 
Do 
0.00560 
4) Diffused light 
520' 
Do 
0.00335 
Do 
Darkness 
520' 
Do 
0.00380 
( 
Sodium lactate and iodine. 
1) Sunlight 
250' 
0.00635 
0.00325 
i N 
j 50 c.c. jQ sodium lac- 
Darkness 
250' 
Do 
0.00575 
1 
] tate and iodine. 
' lUÜ 
2) Sunlight 
480' 
Do 
0.00135 
! Do 
Darkness 
480' 
Do 
0.00295 
3) Diffused light 
490' 
Do 
0.00203 
Do 
Darkness 
490' 
Do 
0.00292 
i 
4) Diffused light 
560' 
Do 
0.00113 
j Do 
Darkness 
560' 
Do 
0.00215 
Sodium tartarate and iodine. 
a) Sunlight 
135' 
0.00635 
0.00148 
i TV 
1 50 c.c. y sodium tarta- 
( A" 
Darkness 
135' 
Do 
0.00381 
1 rate and 5 c.c. iodine. 
b) Sunlight 
250' 
Do 
0.00085 
j Do 
Darkness 
250' 
Do 
0.00213 
c) Diffused light 
200' 
Do 
0.00272 
Do 
Darkness 
200' 
Do 
0.00356 
i 
d) Diffused light 
240' 
Do 
0.00132 
1 TV 
1 75 c.c. sodium tarta- 
Darkness 
240' 
Do 
0.00205 
i ^ 
\ rate and 5 c.c. iodine. 
