38 IONIZATION COEFFICIENTS OF CERTAIN 
the solution. The following table gives the results of the obser- 
vations together with the values of the temperature coefficients, 
(H1s— po) /fys- Concentrations are expressed in gramme-equiva- 
Jents of anhydrous salt per litre and conductivities in terms of 
10-8 times the conductivity of mercury at 0° C. The conduc- 
tivities at 18° were tested by comparison with Kohlrausch’s 
values, these values when plotted on coordinate paper being 
found to lie practically on the same curve as mine. 
TABLE I. 
POTASSIUM SULPHATE SOLUTIONS. SODIUM SULPHATE SOLUTIONS. 
Coneen.| a, etuivalent oe Equivalent | jie 
tration at Conductivity (H/). a GE Conductivity (“). | 18 "0 
18°C. P18. TEA OS alia ae sae aa 
___| Atis'e. | At orc | ___| Atisc. | Atore. | ie 
U10 ! 1099 687 379 .010 907 553 | 388 
008 1116 698 | .375 .008 919 562 | 389 
005 1142 716 373 005 946 577 390 
004 1155 723 SUA || sce tectecte ier tatsrerars | BaeeUe.aa|Maosccoc 
002 1180 740 old .002 | 981 596 393 
001 1206 Tat 372 001 997 604 394 
-0008 1213 762 372 0008 1003 607 395 
0006 1221 768 | 371 0006 1008 609 396 
-0005 1225 eal Roy ps | 0005 1012 611 396 
-0004 1230 775 | 1) | eee eer soca sS|icoc 400 
-0002 1240 781 | 370 0002 1027 620 396 
.0001 | 1248 786 | 370 -0001 1036 626 9896 
It will be seen that the temperature coefficients for potas- 
sium sulphate solutions diminish with increase of dilution 
while those for sodium sulphate increase. This result* was so 
* The results of this table are in close aereomens with those obtained by ‘Desuiete 
(Dissertation, Strassburg, 1895), of which Mr. Archibald was not aware.—J. fl, 
