899 
tage that the assumption of a transition case (see p. 1186) becomes 
unnecessary (viz. the case in which the moving molecule is always 
within the sphere of attraction of J/,, but not always within that 
of M,) — a plausible law of attraction must be substituted for g,—/, 4+ « 
and 9,—/,—wz in the expressions for F,, and F,, so that we havee.g.: 
| ge ae A 
Gay eae fase! 
through which we obtain with small values of a: 
an \ x Se o—8 
Be ea aca) 
eg 
In als (J—o) (l—s) 
Fat inn f |» oP | 2 
ml—s|l  (l—a)(l—s) Hls Lo) (2) 
i.e. again proportional to «. This first proportionality and the corre- 
sponding quadratic form of the term of work [Fue continues to 
exist whatever form is given to the expressions of the action of the force. 
According to DeBrr') the exponent » would have the value 9 
(for anomalous “Dipol” gases n would be =7 on the other hand; 
cf. the note on p. 183 loe. cit.). 
But also the above forms of F, and F;, are in a still greater 
degree subject to the drawback, that they lead to integrations which 
it is impossible to carry out in the further calculations. 
5. However — without having recourse to the dualistic law of 
force (one for the attraction and another for the repulsion) which 
we have chosen for practical reasons — also (2) might be used for 
the calculation of 
le’ ls’ 
1 mens 
Ri fm ri [vw Fre de, ed 100) (8) 
0 
daz 
(== 
Vu’ + w 
0 
L 
in which wo, = — | Fdx; provided one is satisfied with a certain 
Me 
0 
approximation in the logarithmic expression which is then obtained 
for w,. We find namely: 
2 Ls)’ — w? 
eg 4. (4) 
m (/—s)? 
1) Desye, Die v. p. Waars'schen Kohäsionskräfte, Physik. Zeitschr. 21, p. 178— 187 
(1920). 
