( m) 
We then see that, at this composition, the points p, and q t are 
no longer separated from each other by a region of solid-fluid, and 
that there exists one temperature between that of p t and q 2 at which 
the three-phase region is contracted to one point. 
At a larger alcohol-concentration the situation becomes as re¬ 
presented in fig. 3 and this figure shows the peculiarity of the 
case even more strikingly than the former, for we now see that 
although we have passed the inner limitation of the opening, re¬ 
presented by the dotted curve, there are still two critical terminal 
points, thus without the PT -figure showing a hiatus. 
If we now proceed to still larger quantities of alcohol the points 
p and q approach each other and finally coincide, at which moment 
there occurs but one critical terminal point on the three-phase area 
as indicated in fig. 4. 
At the end of this first short communication it should be pointed 
out that the experiment has already proved the correctness of the 
