396 
considerations can be used, as for the organic liquids, this conclusion 
may appear as a direct and justified consequence of theory. But in 
our opinion this can hardly be true: for all conclusions based upon 
the rule of HKétvés, premises implicitely the validity of the law of 
corresponding states. Now it must appear highly improbable, that 
this law could hold really in the case of electrolytically dissociated 
substances as molten salts are, where the degree of dissociation, 
moreover, varies doubtlessly with the temperature. And if the law of 
corresponding states for such electrolytes is doubted, then at the 
same time all arguments lose their validity, which must serve to 
: 2 Ou 
sustain the view, that the values of could prove the associated 
t 
state of such molten salts. 
Moreover we wish to draw attention here to a second fact in the 
‘ase of these compounds. Formerly *) the first of us was able to 
show, that in the case of the homologous molten /alogenides of the 
aleali-metals a regular shifting of the y-t-eurves with respect to each 
other, in connection with the atomic weights of the halogens or of 
the alcali-metals, can be stated. 
It occurs in such a direction, that at a same temperature ¢ the 
value of 4 in every series of halogenides diminishes regularly with 
the increase of the atomic weight, as well of the alcali-metal, as 
of the halogen (loco cit). If, however, instead of the mutual 
situation of the y-f-curves, that of the g-/-curves is compared in an 
analogous way, this regularity appears to have vanished almost 
totally. Thus eg. the u-t-curve for NaF’ is situated appreciably 
higher than that for iF’; in the ease of the chlorides the corre- 
sponding curve for the Aéb-salt is situated much Aigher than for the 
Na-salt, this one however again higher than in the case of the 
K-salt, while the last curve is higher than that for LiC/. The 
precedence in the case of the bromides, in a decreasing direction, 
is: Rb, Na, and K,Cs, — both the last mentioned curves almost 
completely coinciding. For the ‘¢odides it is in the same way: 
Rb, Cs, A, Na. On the other hand, with the arrangement in the case of 
the Li-salts the u-t-curve for the fluoride appears, — it is true, — 
much higher than that for the chloride; but in the case of the Na- 
salts the precedence is in a decreasing sense; /’, Br, Cl, /; in the 
case of the K-salts in tbe same way; F, Cl, Br, /; with the Ré-salts : 
GL sR Bre sand m the iease, okathentisssalts ols Jar, Ee 
Nowhere, however, can there be stated a regularity, perfect in 
any respect. 
; 1) F. M. JAEGER, these Proceedings, 17, 555, 571, (1914). 
