558       Prof.  A.  W.  Porter  on  the  Inversion-Points  for 
The  values  of  a  and  /3  corresponding  to  various  inversion- 
points  are  tabulated  below  : — 
Reduced  temperature 
of  inversion-point. 
Reduced  volume 
of  inversion-point. 
Reduced  pressure 
of  inversion-point. 
0 
•5 
0 
1 
4/7 
7e~^=  1-561 
2 
-       2/3 
6e2    =   9-894 
3 
4/5 
5e"   =16-11 
4 
5 
1 
4/3 
4e^  =17-93 
3e+»  = 16-422 
6 
2 
2/r=12-47 
7 
4 
eT4=  6-89 
8 
GO 
0 
These  numbers  are  plotted  on  fig.  2. 
Fio-.  2. 
Reduced  Inversion-points  according  to  Dieterici's  Characteristic  Equation. 
tHyW 
Wfl 
rrm 
io 
B^ 
l<?n 
ktffik 
i 
& 
R 
apic 
r> 
> 
& 
^ 
X 
5 
1 
0 
1 
5 
ao 
^     ,.  fOrdinates— Reduced  Temperature. 
Continuous  curve        Abscissse__Reduced  Pr  Jure. 
Dotted  curve 
j  Ordinates — Reduced  Temperature. 
\    Abscissae — Reduced  Volume. 
(c)   General  Discussion. 
The   curves   which   we   have   obtained   corresponding   to 
different  equations  of  state  both  exhibit  the  same  general 
