536 



It is apparent from fig. 4 tliat again also in this case the curves 

 follow one aiiollier in diagonal succession. The partition of the curves 

 is no more symmetrical, however; between the curves (1) and (5) 

 and between (2) and (3) no metastable curve is found; between (1 ) 

 and (2) we find the metastable part of one curve [viz. of curve (4)]; 

 between (3) and (4) and also between (4) and (5) we find two meta- 

 stable curves. This is also in accordance with fig. 3 ; herein phase 

 4 has a particular position with respect to the phases i and 2; 

 this is also tiic case in fig. 4 with curve (4) with respect to the 

 curves (1) and (2). In fig. 3 phase 4 has also a |)articular position 

 with respect to the phases 3 and 5; this is moreover the case in 

 fig. 4 with curve (4) with respect to the curves (3) and (5). 



We see also in fig. 4 the confirmation of the rule, that each 

 region, which extends over the metastable or stable part of a curve 

 (Fp), contains the phase I'],. When we lake e.g. curve (1); the 

 regions 124 and 134 extend themselves over the stable part of this 

 curve; the regions 125 and 135 extend themselves over the meta- 

 stable part; each of these regions contains the phase 1. 



Tiie regions 125 and 135 extend themselves over the metastable 

 parts of the curves (1) and (5); both the regions contain the phases 1 

 and 5. The region 124 extends itself over the curves (1) and (2j; 

 it contains therefore the phases 1 and 2. 



Type III. Now we shall yet consider the case that the five phases 

 form the anglepoints of a bicon\ex quintangle (fig. 5). In order 

 to determine the position of the five curves with respect to one 

 another, we take the reactions : 



2 + 3:;t4+5 3;:!l+4 + 5 



(2) (3) I (1) I (4) (5) (3) I [2) ! (1) (4) (5) 



4^1+2+5 1+2+5^3 



(4) I (3) I (1)(2)(5) (1)(2)(5) I (4) | (3) 



1 +2+3^4 



(I) (2) (3^ I (5) I (4) 



We now draw in a P, 7^-diagram (fig. 6) the curves (1) and (2); 

 we take curve (2) at the left side of (1). In connection with this 

 we have written both the first reactions immediately in such a way 

 that also herein (2) is situated at the left of (1). 



The position of curve (3) follows also at once from both the 

 first reactions, viz. at tlie left of (1) and of (2), consequently we 

 have to draw in fig. 6 curve (3) within the angle, which is formed 

 by tiie stable part of curve (2) and the metastable part of curve (1). 



(5) 



