399 
Fig. 4. 
6. It will be clear that the number of cases possible compared 
with those of the first case of §3 and $+ will be smaller here, as 
only one of the components can appear as solid substance, but that 
on the other hand the transformation of the plaits gives rise to a 
complication. 
If we again take the case of $ 5, the transformation can take 
place before the state g has been reached, as described above. If, 
however, the temperature of gy is lower than that of the transfor- 
mation, then just as before, the three-phase line S + L, + L, con- 
tinues to terminate in the hidden -plaitpoint ?,, and so, though the 
shape of the eritical line is entirely different from that in § 3, we 
have the same connection of the three-phase lines 5 + L, + G and 
S + L, + G, and two critical points on S + L, + L, and L,-+bL,+G. 
In analogy with $4 we can also imagine that the longitudinal 
plait makes its appearance and is transformed after the solid-fluid 
line in the figure has been. shifted some distance to the left, and 
then overtakes tbe solid-fluid line. In this case we shall again have 
to distinguish two cases, viz. that the transformation appears before 
or after the state g. 
In the first case the three-phase line, which begins in the unstable 
