1019 
We can also include into the symbolical representation the different 
regions; when we do this for the previous diagram (1), then we 
find the diagram (2). 
Stab. (1) 5 (4) (3) (2) (1) 
| 234 | 123 125 | 145 | 345 | 
5 DRI 5 200 245 —- 245 
2 —- 134 1 nm 1165) 134 (2) 
2 | 124 ene | 
| | | | | 
Metast. (3) (2) (1) (5) (4) 
Hence we see that the regions 234, 235, and 134 are situated 
between the curves (1) and (5) and that these regions are intersected 
by the metastable part of curve (3); ete. The region 235 extends 
over curve (5), the region 124 over curve (4) ete.; this is indicated 
by the horizontal connecting line. It seems in diagram (2) that the 
region 134 consists of two parts, separated from one another. This 
is, however, not the case; this region extends itself viz. from 
curve (5) over curve (1) up to curve (2); this extension over curve 
(1) is. indicated in the diagram also by a horizontal line. 
Now we shall also replace the P,7-diagram of fig. 6 (II) by a 
symbolical representation. In fig. 6 (III) the regions are not indicated, 
we shall, however, include them into the symbolical representation. 
The same as from the P,7-diagram, we see from 
stab. PF’ A’ D B Gf EF’ F’ 
ADR AE (AZ) 
an (DE) J- (DE) 
Bs AC) +-(AC) -- (AC) 
5 (BF) -- (BF) (BF) 8 
& AB) --(AB) | (BE)--(BE) (3) 
5 (DF)-+- (DF) | (CD)--(CD) | (CH) -+ (CF) 
(AF) AD) \CBDy. \ CBC) IL (CE) (EF) 
feb | Pale 
metast. C’ H’ Ja AID OB 
the symbolical representation that the curves are forming three 
bundles, viz. one threeeurvical bundle (A’D’ B’), one twocurvical 
bundle (C’ Z£’) and one onecurvical bundle (/”). 
