( 491 ) 
d 3y—1 
nh takes place is determined by the value of «= 1— : 
dv dy? 
ee) 
a -— wa: ee . 
1 
and as it cannot be greater than 1, y must always be greater than 7 
or 
So the quantity « has always the same sign, 
So the equation of this line is: 
Eat nie, Enten 
(n—1)?@ (n—ljl—e 4y? 
Now we have also the means to decide whether the temperature at 
d* ye a 
which = Q disappears, is higher or lower than the critical tem- 
wv 
perature of the mixture of the value of z=, — in other words 
d? 
whether 7, en Teelt T= Te) then Ee 0 has left the region where 
dp Tw 
daz" 
Dn <0 on the side of the branch of the small volumes of ae 
Vv Vv 
and this branch is still found even at the temperature 7,. For the 
other case we have a representation of the relative position of the 
two curves after they had left each other in fig. 10, Contribution 
—0, 
Ill. The condition (Ce Ty, (see Contribution III) may be written : 
2 ly > 8a 
— PH == nnn —_ — 
pea man Se 
or 
27 ca (1—2) AL ge 
A BR (1—y) 
If we write further ss — == Et pr the condition becomes: 
la + OE 
27 1 > (1-4) 
‘ l—a + En = me 
For a=1, or for the origin O, this condition becomes : 
27 y ZL Hy) (1 —g). 
i 
For y= Ss 2 the first member of the inequality becomes 
27 9 
equal to re and the second member to a which means that 
