LIS 
Now we shall seek the concentration-diagram belonging to a P,7’ 
diagram. We take fig. 1 a (V); as each bundle is onecurvical, the 
series of signs becomes: 
A|E BLEIC|IG|D Ne ND) 
hale 
so that the type of the concentration diagram is defined. We can 
find it in the following way. From (80) follows the reaction : 
aA—eB+bB—fF4teC—gG+dD=0 +. (81) 
wherein a,e,6,... are positive. We write for the second reaction : 
Agee bob Bae sd DO. (32) 
wherein the coefficients may have positive and negative values. 
Now we have the conditions : 
a—e+tb—fte—g+d=0 
diéeé+tbh+tft+eétgid=o 
at 
a 
( eé_ b a c! gd 
and > >-> Dn dan ~>- 
e b / c g d 
a 
by which the type of the concentration-diagram is defined. It is 
evident that those conditions can be satisfied in infinitely many 
ways. We may take as example amongst others : 
A—2EF+B—F+C—G64D=0 
and 6A—THIL3B4F—-20436—4D—0 
Herein is viz. : 
6>i>3>—-1>-2>-3>-—4. 
Below the corresponding series of signs follow for each of the 
P,T diagramtypes in quinary systems [figs. 1, (V) and 2 (V)] 
fiel a (Wee or B8 
fig. 1 5 (WV) +++—+—-4+ .... (4 
AN Sear nn a fight ee 
ites CIO ee ai ede 
ii Nr raten ideen eee aC 
Dees fe ea ee ln ed VS 
FMA a re dei ge = a) 
fe ele Weta = otis oie epg cee ee 
Series 33 contains seven, each of the series 34, 35 and 36 contains 
five and each of the series 37, 38, 39 and 40 contains three groups 
of signs. 
The reader himself can now easily deduce the series of signs for 
systems with 6 and more components. 
Above we have deduced: when the last group of a series is 
