1143 
states, viz. the variability of 6. This variability of 6 differs for 
different substances, and depends on the form of the molecules or 
on the qnasi-association, which indirectly influences the course of 6. 
If we put 5, for the greatest value of 6 and biim for the smallest 
value which is of importance for the equation of state, the ratio 
is different. This ratio however, oscillates comparatively little 
lin 
round the value 2. 
v- ari 
Bien 1; 
(-|x) axis of the association. 
Fig. 2. 
b 
This ratio 4 = 
lim 
the species to which the substance belongs. 
determines, if I continue to speak of species, 
