(779 ) 
for # and g=170 for D (see § 4), so that we may write '/, 3(1—) g” 
instead of 1 + '/,8(1—8)(1—g)? — if namely the value of 3 and 
1 — B is not too small. It will presently appear that this is not the 
case. 
So in the points D and E we have got by approximation: 
2a_ (149) RT it ARI 
oor (LEBARA (Ay 
(vb)? ge) 
Now in D (see fig. 1) v is in the neighbourhood of 6,, whereas 
in £ the volume v is in the neighbourhood of 24,; hence if we put 
1 —g8 and 1+ 8=1 for D, where 8 is near 0; and p=—1, 
1-+ 8=2 for £, where gis near 1, we get by approximation (R = 2) 
a lk 
DD nr PE" 
1,8 (1—8) 
ap, 2D 
SON ie @=— 2100, by ds 26, Ab VWE 
find : 
18 2 a 1 
== = — = 0,027 7 1—se= = 010017. 
2700X!/, 75 2700 X8X/, _ 600 
So above at D we have neglected 1 by the side of circa 
0,0133 X 170° = 400, and at Z£ we have neglected 1 by the 
side of circa 0,00083 X 185? = 28,5; so that the above values of 
Bp and 1— fp may be considered as permissible approximations. 
It is now easy to caleulate the pressure in the points D and F 
Bp 
1 —Ab 
from the equation of state. With ana ge p the latter becomes 
(ae 
(see equation (4) and (6)): 
BE a 36 2700 
Ee 
Hence we find: 
pE= 6700 — 10530 = — 3830, 
1 
as according to (6%) p = 186 and v = 0,506 corresponds to By a Sn: 
And as g=173 and vp = 0,99 corresponds to Bp = 0,027: 
Pp = 6230 —- 2750 = 3480. 
As to the points B and C, for them @=O for 7'= 9, as we saw 
before. So there is simply : 
2a RT 
v* en (v —b)' 
