( 33 ) 
I already between b, and 2 b, that here too a maximum at D occurs 
a suitable place and a minimum at E. As appears from (3) or 
i; thls Wlll > of course, only be the case when the temperature 
rises above a certain value (in the neighbourhood of the triple-point 
temperature), just as for A b negative the temperature must descend 
below a certain value to bring this about. (See also fig. 4 of the 
plate in the foregoing paper, in which figure the line SM will now 
run to the right). 
I But as has been said, we shall discuss these relations — specially 
m reference to the situation of the triple point and the course of 
the line SM — more fully in a subsequent paper both in the case 
no positive and in the case A b negative. 
I ^ et , us now “amine the limiting values of the minimum at C 
and the maximum at B, when T converges to 0. As past D the change 
of ,'J (from 1 to 0) has come to an end, if T= 0, —can be found 
nr dv 
from P = — yielding £ = So this is 0, when 
(»-*,)■ JiT 
!>■ 2o’ 
so that then either vz=b x or v = oo for T -= 0. 
If we substitute (»-«,)*'= ~ in the equation for p, we get: 
| /2a . RT a 
f ‘ p 7* ~7’ 
which for T= o, V.^zb, leads to: 
(r=0 - : vc= ~h .w 
Hence to —2700 in our example. (For f=9we found —2100). 
(For T = 9 we had 
Then the value of <p = —^ (_A6) is = 
u ~~ 8, so that <p c rapidly increases, when T comes near 0). 
m v — 00, p is evidently = 0. Then p is also = 0. *) 
K *) If at low temperature |3 = 0 in G and B, then approximately 
_ . w 
follows from —— ^ 
v 9 2a' 
So with our values for T = 9 v f .= l +/A = 1,06 and ^ = 
300. 
Proceedings Royal Acad. Amsterdam Vol. XII. 
