134 MESSES. A. Y. HAECOURT AND W. ESSON ON THE LAWS OE CONNEXION 
Table VI. 
Observed. 
Calculated. 
1 
•0151 
2 
•0302 
•0302 
3 
•0453 
•0453 
4 
•0602 
•0604 
5 
•0756 
•0755 
6 
•0905 
•0906 
To confirm this result a second series of sets of experiments was made, differing from 
the former by the substitution of hydric chloride for hydric sulphate. Comparing 
equivalent quantities, it had been observed that hydric chloride increases the rate of 
change nearly twice as much as hydric sulphate. Therefore, in order to obtain a suffi- 
cient series of different rates of which the first should not be inconveniently small, nor 
the last inconveniently great, one molecule or half an equivalent of hydric chloride was 
substituted for a molecule of hydric sulphate. 
Volume of the solutions 993 cub. centims., temperature 30° C. 
Actual weights of substances taken in each set : 
Plydric chloride, 13*8 grms., 
Sodic peroxide, *0257 grm., 
Sodic hyposulphite (one measure), *0135 grm. ; 
in successive sets, 
Potassic iodide, -3, -6. -9, 1-2, 1*5, 1-8, 21, 21 grms. 
Hence the permanent ingredients of a unit of volume of the system in each set of expe- 
riments were 
(381-3 — 1-82 z)HCl, 1-82 ((n-z)KI+zHI), 1-82 zKCl. 
Table VII. 
n =] 
p 0 ~' 
l. 
16. 
0274. 
n =2. 
Po=T7. 
a =-0274. 
Po - 
3. 
166. 
0274 
Po=\ 
1. 
165. 
0274. 
Intervals. 
Intervals. 
Intervals. 
«■ 
Intervals. , 
13-82 
•0136 
6-53 
•0269 
4-43 
•0406 
3-38 
•0537 
16-83 
•0137 
8-05 
•0265 
5-47 
•0402 
4-20 
•0528 
21-42 
•0140 
10-13 
•0268 
6-93 
•0406 
5-38 
•0531 
32-83 
•0132 
13-95 
22-42 
67-08 
•0269 
•0270 
•0267 
9-82 
16-27 
■0401 
•0406 
7*25 
12-65 
•0555 
•0540 
n =1 
n =6. 
n =7 
n ={ 
). 
Po- 
164. 
Po — ' 
164. 
Po-' 
163. 
Po- 
161. 
et _• 
0274. 
0274 • 
0274. 
CL — ■< 
0274. 
Intervals. 
«• 
Intervals. 
Intervals. 
«■ 
Intervals. 
2-68 
•0681 
2*28 
•0802 
1-92 
•0957 
1 68 
•Ill 
3-35 
•0666 
2- 77 
•0809 
2*40 
•0940 
2-17 
•106 
3-62 
•0798 
3-07 
•0951 
2-75 
•108 
6-05 
•0670 
5-05 
•0809 
4-40 
•0942 
4-02 
•106 
10-32 
•0671 
8-78 
•0802 
7-58 
•0948 
7-oo 
•108 
