Concentration 
of the Double Salt 
Solutions. 
+ Cu K,(S0,)o. 
1.294 
1.000 
909 
7500 
6666 
£5000 
4000 
3333 
2299 
1666 
1000 
0909 
0750 
06666 
05000 
04000 
03333 
02222 
| 01666 
01000 
00800 
00750 
00600 
00500 
AQUEOUS SOLUTIONS.—ARCHIBALD. 
Concen- 
tration of 
ions in the 
Solution. 
4300 
3610 
3300 
2875 
.2615 
2072 
1728 
1480 
1046 
0816 
0536 
0494 
.0420 
.0379 
0294 
0242 
0207 
.01455 
.01145 
00729 
-00597 
.00565 
-00463 
.00393 
TABLE ILI. 
Dilution in the 
Solution. 
zK,SO,. 
1.260 
1.540 
1.682 
2.000 
2.226 
2.910 
3.62 
4,29 
6.30 
8.32 
13.48 
14.76 
Lael 
19.80 
26.05 
32.3 
38.8 
56.5 
73.8 
119.0 
146.8 
156.0 
191.8 
228.4 
313 
Conductivity of Double Salt 
Solutions. 
+ Cu SO,. 
284 
460 
520 
.665 
74 
1.090 
1.385 
1.710 
2.705 
3.68 
6.52 
7.26 
8.95 
10.21 
15.95 
17.66 
21.25 
33.5 
46.2 
$1.0 
103.2 
110.5 
141.4 
171.6 
Caleu- 
lated. 
535.9 
447.0 
414.8 
304.7 
322.4 
254.9 
212.3 
181.7 
128.1 
99.85 
65.44 
60.34 
51.12 
46.15 
35.79 
29.43 
25.11 
17.64 
13.85 
8.784 
7.196 
6.797 
5.569 
4.719 
Observed. 
504.1 
423.5 
394.4 
340.1 
310.5 
246.3 
205.9 
176.7 
126.1 
99.21 
65.20 
60.21 
50.96 
46.26 
35.89 
29.40 
25.18 
17.59 
13.88 
8.760 
7.180 
6.776 
5.584 
4.730 
‘Differences 
per cent. 
+6.38 
+ 5,54 
+5.17 
+4,29 
+3.83 
+3.49 
+3.11 
+ 2.83 
+1.59 
+0.65 
+0.37 
+ 0.22 
+0,31 
— 0.20 
— 0.28 
+0.10 
— 0.28 
+0.34 
— 0,22 
+0.27 
+0.22 
+0.31 
— 0.26 
— 0.28 
It appears from the above table that while in the case of 
solutions with concentration ranging from the weakest examined 
up to about 0.1 gramme-equivalent per litre, calculated and 
observed values agree within the limit of observational error, 
(which, as in the former paper, was estimated at 0.25 per cent), 
the differences between observed and calculated values for solu- 
