533 



curve (1) is situated at tlie riglit of (2), (3) must consequently be 

 situated at the left of (2). 



Consequently we find: curve (3) is situated, at the left of (1) and 

 of (2); curve (3) is situated therefore, as is also drawn in tig. 2, 

 between the stable part of curve (2) and the raetastable part of 

 curve (1). 



Now we determine the position of curve (4). It follows from the 

 first reaction that (4) is situated at the right of (1); it is apparent 

 from the second reaction that (4) is situated at the left of (2). Curve 

 (4), therefore, as is also drawn in fig, 2, must be situated between 

 the metastable parts of liie curves (1) and [2). 



At last we have still to determine the position of curve (,5). It 

 is apparent from the reactions abov^e that curve (5) is situated at the 

 right of fl) and of (2). Consequently curve (5) is situated within 

 the angle, formed by tiie stable {)art of curve (1) and the metastable 

 part of cur\e (2). Within this angle we also find however the 

 metastable part of curve (3); consequently we now still have to 

 examine in what way curve (5) is situated with respect to curve (3). 

 We take for this the reaction between the phases of curve (3); we 

 find from fig. 1 : 



4 + 51^1 + 2 



(4) (5) i (3) \{l)(2)\ ^^^ 



As we know already that (1) and (2) are situated at the right 

 of (3), we have written this reaction immediately in this way that 

 also herein (1) and (2) are situated at the right of (3). From this is 

 at once apparent that (5) must be situated at the left of (3). 

 According to the previous it is apparent, liierefore, that curve (5) 

 must be situated between the metastable parts of the curves (2) and (3). 



Besides the reactions 1, 2, and 3 we may still deduce two other 

 reactions from fig. 1; those reactions refer to the phases of the 

 curves (4) and (5). Although those reactions are no more wanted, 

 they may however be used as confirmation. We find ; 



1+5^2 + 3 I -^2:^13 -^i 



(1) (5) I (4) I (2) (3) ''"'' (1) (2) I (5) I (3) (4) 



The partition of the curves, which follows from this is also in 

 accordance with fig. 2. 



Now we have still to deduce the partition of the regions. Between 

 the curves (1) and (2) the region (12) =: 345 extends itself, between 

 (1) and (3) the region (13) := 245, between (1) and (4) the region 

 (14) = 235 and between (1) and (5) the region (15) = 234. When 

 drawing those regions we have to bear in mind that a region-angle 



