( 121 ) 
phase on the portion EF. The vapour phase (between A and B) 
lies outside the limits of our drawing. 
The locus of the minima in E and of the maxima in B, which 
passes through the critical poiiit K, where B and E coincide, has 
not been indicated in our drawing. 
Nor are the pressures of coexistence liquid-solid, solid-vapour, 
liquid-vapour indicated by horizontal lines; only for T= 0 the 
pressure of coexistence liquid-solid is indicated (p = 1000), whereas 
that for solid-vapour coincides with the axis p = 0. 
T—100 . 
Now with 6 — —— = — the formula (3°) [see II, p. 26] becomes : 
3200 16 
-^- = 32000 X - 5°° 
l— F V 16 / <P v 
hence 
log 10 = — 4,250 + 0,4343 y — log 10 tp , 
2700 
while for p we find p = 400 <p - — (see II, p. 28). 
Proceedings Royal Acad. Amsterdam. Vol. XII. 
