2y 
C ey D —y 
AA EEn TCE, zh 
E = Ff = 8 
TE Teek oS (40 IIT) 
Str (40° VI) 
The reasons for trying all of which in connection with VAN DER 
WAALS’ equation may easily be seen, but they proved less suitable 
for the calculations than (I) and (40° V) while at a nearer inves- 
tigation (I) appeared to be the most suitable. 
It is remarkable that whereas our theoretical representations 
would lead us to forms as (40° 1,11, LI, IV), the calculation of 
differences requires a form as (I). 
The development in series (I) relates to the theoretical normal 
volume as unit of volume. AMAGAT gives the volume expressed in 
the normal volume; if we call this vy and that given by AMAGAT v4 
then 
Ui Ug Vy «| rc) ey sl, bg eed oe ee 
If we apply AMAGAT’s results to 
By C4 BD, Ey F 
ee | oe. eee 
VA VA VA VA VA 
then we have 
A = A, tn, B= Bu, C= Cg vy’, DS Dion ee (3) 
further for £— 0°*C. 
ae A al a gi Bi Sag = ° entre (4) 
