( 560 ) 
Fig. 7 represents a similar meeting point MN for the case corre- 
sponding with Fig.4. Far greater chance of attaining a critical ter- 
minating point of the line 4,,5 is offered by the case of Fig 5 
which would lead to Fig. 8. The line OQ is here supposed not to 
proceed as far as the lower mixing point J/’ because the solid phase 
occurs previously at Q. For this reason the downward continuation 
of the critical line L, = L, is wanting. 
If, however, the mixing 
point J/’ should lie but very 
little below Q (metastable) 
the point of intersection WV 
might be found at a compa- 
ratively low pressure. Mr. 
Bicuner has frequently no- 
ticed a similar proximity of 
M' and Q in systems of all 
Fig. 8. kinds of organic substances 
which on being dissolved in liquid CO, give rise to two layers. 
Besides the three 
cases fig. 6, 7, 8 in 
which there exists a 
critical — terminating 
point of the line QM 
a fourth type is pos- 
sible. This occurs 
when the liquid on the 
line HQ already be- 
comes critical with the 
vapour before Q has 
been reached, that is 
beforethesecond liquid 
Fig. 9. occurs In presence of 
the solid phase. ZR then intersects the critical line liquid-vapour in a 
critical point A which quite corresponds with the point p of Smits 
(fig. 2). The line QO is now wanting, namely, below /è we notice 
nothing of a second liquid. Mr. Bicuner has here again graphically 
deduced that in this case the line QS, for the second series of liquids 
in presence of solid B and vapour, fuses with QN to a single line 
BQN where the one fluid phase has the character of vapour on the 
lower part and of liquid on the upper part, whilst these however, 
gradually pass into each other. 
In this case, like in fig. 4 the lower part of the critical line GL 
