( 528 J 



O tot X, we puss successively through the four regions ^1, B,, C 

 and D. For g, =z 10 T^ e.g. Ave should pass through the region B^ 

 instead of through B^. 



If q^ is assumed to be constant, e.g. =:U\, we pass successively 

 through the fields A, B^, C, D and E, when q^ decreases from oo tot 0. 



Fig.4 gives a representation of the first mentioned transition, viz. 

 for q, = ST,. 



Between the ineltingpoint-curves, marked 2,4 and 2,8 (so holding 

 for q-^ = 2,4 and '2,8 T^), tjie transition from A to B^ (hatched) is 

 situated. Between 3,4 and 3,8 (see the hatched parts) is the transition 

 from B^ to C. Between 7 and 8 (in this case for T = /{.v')) that 

 from C to D. Further the cases q^z^ 1, ^i = 2 (..1), q^^= 5 (C) and 



