538 



When we delermine, as lias l)een indicated formerly, llie partition 

 of the ret^ions, then we find tiiis as is indicated in fig. 6. 



It is apparent from fig G that also again in tliis case the curves 

 follow one another in diagonal snccession. Tlie partition of the 

 curves is not sj in metrical. The phases 2 and 5 (fig. 5) are situated 

 in liie same way with respect to 1, 3 and 4, the phases 3 and 4 

 with res|)ect to 1, 2 and 5, while phase 1 has a particniar position 

 witli respect to tiie others. This shows itself therefore in the position 

 of the curves in fig. 6. 



Also we see again in fig. 6 the confirmation of the rule, that each 

 region which extends itself over the metastable or stable part of a 

 curve {Fp), contains the phase /'"/*. The region 125 e.xtends itself 

 over the metastable part of curve (1), tiie regions J 24, 134 and 135 

 extend themselves over the stable part ; each of these regions con- 

 tains the phase 1. 



The metastable pans of the curves (i), (2) and (5) are situated in 

 the region, which is limited by the curves (3) and (4) ; this region 

 contains therefore the phases 1, 2 and 5. 



When we combine the results, obtained above, then the following 

 is apparent. 



1. Three types of P, 7-diagrams exist 



(i) as in fig. 2, when the five phases form the anglepoints of a 

 convex quintangle (fig. 1) ; 



A) as in fig. 4, when the five phases form the anglepoints of a 

 monoconcave quintangle (fig. 3) ; 



c) as in fig. 6, when the five phases form the anglepoints of a 

 biconcave quintangle. 



2. The three types differ from one another by the position of 

 the metastable parts of the curves and by the partition of the regions; 

 they are in accordance u'ith one another in so far that the curves 

 follow one another in diagonal succession. 



In order to formulate the obtained results in another way, we 

 shall call "a bundle" a group of curves, which follow one another, 

 without metastable parts of curves occurring between them. Conse- 

 (]uently in fig. 6 (5), (1) and (2) form a "bundle", which we shall 

 call a ''threei-urvicar' bundle, as it consists of three curves ; curve 

 (3) forms a "oiiecur\ ieal" bundle, the same ajiplies to curve (4). 



In fig. 4 (1) and (5) form a "twocurvical" bundle ; the same 

 applies to (2) and [3) ; curve (4) forms a "onecurvicar' bundle. 



In fm-. 2 each of the curves forms a "onecurvical" bundle. We 



