Bromine and Sodium tartarate. 
Quality of light 
Time of 
exposure 
Amount of 
bromine 
added 
in grams 
1 ■ ’ 
Unchanged ' 
bromine 
Volume of solution 
a) Sunlight 
25' 
0.06527 
0.01028 ‘ 
1 ^ 50 c.c. sodium tar- 
1 tarate and 10 c.c. bro- 
Darkness 
25' 
0.06527 
0.05735 1 
) mine water. 
b) Sunlight 
40' 
0.12354 
0.01832 
1 N 
1 50 c.c. ^ sodium tar- 
1 tarate and 20 c.c. bro- 
Darkness 
40' 
0.12354 
0.10374 
’ mine water. 
c) Diffused light 
90' 
0.06527 
0.01724 
1 TV 
1 50 c.c. ^ sodium tar- 
( tarate and lOc.c. bro- 
Darkness 
90' 
0.06527 
0.03542 : 
) mine water. 
d) Diffused light 
120' 
0.12354 
0.02238 ' 
1 TV 
f 50 c.c. ^ sodium tar- 
1 tarate and 20 c.c. bro- 
Darkness 
120' 
i 
0.12354 
Jromine and^ 
0.04834 
Citric acid. 
1 mine water. 
a) Sunlight 
55' 
0.06527 
0.02014 
1 TV 
1 50 c.c. -3 citric acid 
1 and 10 c.c. bromine 
Darkness 
55' 
0.06527 
0.05912 
1 water. 
b) Sunlight 
75' 
0.12354 
0.03975 
1 TV 
1 50 c.c. ^ citric acid 
1 and 20 c.c. bromine 
Darkness 
75' 
0.12354 
0.10172 
I water. 
c) Diffused light 
100' 
0.06527 
0.02175 
1 TV 
1 50 c.c. citric acid 
( and 10 c.c. bromine 
Darkness 
100' 
0.06527 
0.03487 
1 water. 
d) Diffused light 
140' 
0.12354 
0.04203 , 
1 
i TV 
1 50 c c. citnc acid 
( and 20 c.c. bromine 
Darkness 
140' 
Bn 
0.12354 
)mine and 
0.05875 i 
)dium citrate. 
’ water. 
a) Sunlight 
45' 
0.06527 
0.01012 
1 
1 TV 
1 50 c.c. ^ sodium ci- 
1 trate and 10 c.c. bro- 
Darkness 
45' 
0.06527 
0.05035 1 
1 mine water. 
b) Sunlight 
80' 
0.12354 
0.01894 
1 TV 
1 50 c c. sodium ci- 
i trate and 10 c.c. bro- 
Darkness ! 
80' 
0.12354 
0.09575 
) mine water. 
c) Diffused light 1 
100' 
0.06527 
0.01695 
1 TV 
1 50 c.c. sodium ci- 
1 trate and 20 c.c. bro- 
Darkness 
100' 
0.06527 
0.03172 
' mine water. 
d) Diffused light 
150' 
0.12354 
i 
i 
0.02938 
1 TV 
1 50 c.c. -- sodium ci- 
( trate and 20 c.c. bro- 
Darkness 
150' 
1 0.12354 
0.05673 
/ mine water. 
