281 
2 (215,7—119,8) Teenie eae on 192. 0 STINO, 
| 1100 4+ 2147 
Now a,/v.2 is no longer = 7 p-, but only slightly less than 2p,. 
In the above discussion we have always supposed m in the neigh- 
bourhood of 2. It might, however, be asked, how high e.g. 7, might 
become, if n was in the neighbourhood of 1. As )/a- would then be 
— 40.10—? (increased attraction of the isolated atoms) instead of 11 a 
10.10—-*, we should get (6 remaining = 120. 10-5): 
8  1600.10-4 
T, = 278,1 X — A—_—__.. = 80,92 4 X 133,8 = 10000° r 
c 97 190.10~6 X about 0° abs 
whereas in reality 7, will certainly not be far from 1700° abs. 
Total dissociation of Hg, into Hy + Hg is, therefore, impossible at 
the critical point. Only a value of 2 in the neighbourhood of 0 (n 
in that of 2) can represent the critical quantities as determined 
experimentally. 
In this first paper we have only specified the experimental data 
known at present more closely, and drawn from them all the conse- 
quences to which these data gave occasion. /f really v = 216. 10-#, 
T,=1700° abs. and p, = 1100 atm. — and there is no longer 
any doubt that this will appear to be the case approximately — 
then belong to the values of 7 mentioned in § 8 the values of 6 and 
a placed under them, viz. the factors for RT, and p, in consequence 
of the small degree of association at 7, in connection with the very 
great value of Ay/a. And this on the strength of the relations derived 
in § 7, which are of general validity. 
But this is only the foundation of our real task. To supplement 
our former theory of the critical quantities on association, we must 
now examine theoretically what follows, in the case of such great 
a d 
values of Aj/a on dissociation, from 7 (amd f= 0, and derive 
0) LU 
the relations which are valid for 7 = v,: 6, and also for 6, the factor 
ot. all in function of the degree of dissociation z and of Aya. 
Then the value of zr, the factor of p., is known at the same time. 
And then we shall also be able, on account of the found 
formulae for r and @, to define more closely the values of them; 
which was not yet entirely possible in this paper, because the choice 
between different values of 7 had still remained open. 
La Tour pres Vevey, spring 1920. To be continued. 
I state with pleasure that the execution also of this work has 
been greatly facilitated by the aid of the Van ’r Horr-fund, for which 
] express my thanks to the -board. 
