604 WILLIAM LAWTON GOODWIN ON THE 
steady, 10 c.c. of the solution was drawn off and the chlorine estimated. As 
the temperature rose, determinations were made as rapidly as possible. After 
the maximum solubility had been attained and passed, the chlorine was 
estimated at intervals of 5 to 10 degrees. The temperature was raised above 
that of the laboratory by pouring hot water into the bath till a thermometer 
marked a temperature two or three degrees above that required. As soon as 
the thermometer in E was steady, the chlorine was estimated. 
Then, if ~ represent the number of cubic centimetres of sltioaniiihict 
employed, a the equivalent of 1 c.c. in iodine, p the pressure of the atmosphere, 
and a the coefficient of absorption, 
na X 22:33 x 760 x 100 
“a ep 
The results are tabulated below. H,0O. 
i 
Made with a common thermometer, and not so reliable below 12° (part of 
stem within E) as the other series made with a delicate thermometer. 
te p e.c. of Na,S,0, a 
4 761°9 20°6 IG Sy ly 
5 21-0 1:9080 
7:5 23:2 2:1079 
8:9 26°8 2°4350 
9:6 28'7 26077 
10°3 29°9 2°7104 
10°8 32-4 2:9438 
Ass 32°9 2°9894 
14:3 27°9 25350 
23:5 23°7 2°1534 
32°5 19st 1:7354 
39'0 15°5 14083 
45:0 12°8 11636 
50:0 eo) 1:0812 
1 c.c, thiosulphate = 0:10537 gm. iodine. 
Ti, 
t p Na,S,0, a 
69 750 20°7 2:2931 
84 230 25469 
9°3 24'5 2°7135 
10:2 26:2 29012 
13:3 265 2'9344 
15°2 23°6 2°6133 
20:9 20:9 2:3143 
1 c.c. = 0°01243 gm. iodine. 
