978 
‘ 7 by. ee 
we should still find RD, The reason, therefore, that even for 
Jy 
great densities the law of correspondence is fulfilled by approximation 
by 
will be owing to this that .—- does not differ much for the different 
Olim 
substances. Moreover the region in which the deviations would 
become of importance. is inaccessible to experiment; e.g. for the 
liquid volumes which could coexist with vapour volumes at values 
1 
OLM = or for volumes under an excessively high pressure. 
We shall add a few more remarks. 
. . . . v a 
That the coincidence of the surfaces ————— = f(2,m) for great 
ve 
rn 
values of v entirely disappears for v very small and near vim, will 
b 
be clear if we pay attention to the fact that for ye 7 4 
lim 
: bp 
the surface has no points below oS ee for then vt” = 6, and 
| ba 
Pr 30, FOr —— equal to a value greater than 1, vijm = Dim and 
lim 
ve = hg, Or 
blim 
a 1 bum d Vim by le Din 
Lin ZT and — —— a =- . 
Je bg 7 = A ie by 3 by 
Bim Bhim 
by . 
If e.g. —- = 2, we have obtained new points for the » surface, and 
lim 
ae Là 1 
the surface begins at Se It will be obvious that in such 
g 
blim 
b, 
Py 5 5 ~ > 7 
circumstances with difference of the value of —— there can be no 
lim 
question of coincidence. There is only perfect coincidence with equality 
b ; ae 5 ; 
of —2. If this value differs, the surfaces almost coincide, indeed, for 
lin 
p 
large value of », but for very small value of vp the —— 3 
Og 
bum 
