( 526 ) 
the following by A — will be no longer a constant for a definite 
value of ., but a funetion of temperature. 
If we draw therefore (see fig. 1) the straight line OM, which 
divides into halves the angle of coordinates (O7’ is the axis of 
temperature, OA' that of the values of A’) — then for mixtures of 
normal substances the point of intersection of the straight line K = 
const, which runs consequently parallel with the 7-axis, with the 
line OA will represent the temperature, corresponding in the Tyx- 
projection of the spinodal curve with the chosen value of x. If this 
were w,, then we should find in this manner 7’. That temperature will 
be — as we have shown on the preceding pages — extremely low, 
On the other hand, in the case of anomalous mixtures, that is 
here: where one of the components is an associative substance, the 
straight line AA’ will transform itself into two straight lines, joined 
by a curve (see fig. 2). The first straight line corresponds then with 
the temperatures, where all the molecules are double, that is therefore 
in the case of water below — 90° C. ; the second straight line will 
correspond with the temperatures, where all the molecules have become 
single — so for water above 230°C. The joining curve will cor- 
respond with the temperatures between — 90° C. and 230° C., where 
the process of dissociation of the double molecules is going on. 
Several cases can occur here, which presently we will briefly discuss. 
5. We should now have to deduce an expression for R7' and 
4, analogous to (7), but this time for the case that one of the 
substances is anomalous. The required considerations and calculations 
will not be reproduced here, however, because I shall do so in the 
more ample Memoir, which will soon be published in the Archives 
Teyler. We therefore will limit ourself to the communication of the 
final result, viz. 
RT = 22 (1—2) (: + 
1—B \(v, Wa, vo, Va.) \ 
av |— — 28 (il \ 
=) : (44) 
v 
= Ar (le) 1 Em al SS 
[N= 4 ob Te =n 
(Reh) ide EN (10) 
u” a 
These expressions come in the place of the former expressions 
(7). Of course they are somewhat more complicated, but they 
have essentially the same form, as will be discussed amply in the 
À IE 
Wu ZERE 
designed Memoir. It will only be remarked, that +n, = onm 
ad Kd 
