( 60 ) 
fi 4 zn OM 
EN a fan le 
A €; 3 Ne 0 t? 
(2 
l 
i ’ 
(4) 
== EN 
Ne dt Nep, 
Ch OM. 1 (cou _p dM: 
dt dt 
The equations (1), (2) and (3) of Vorar, taken this time in their 
general form, may again be written in the form of (1’), (2) and (3’); 
for this purpose it will suffice to replace as before 
du = 
ve &, pete: 
by 
Dx De €,. 
._—) » ete. 
47 v? v2 4a? 
and 
U hy Vis Wi 
by 
Mix Miz Miz 
: ’ 
Eh En En 
er Ek : 
From (4) we shall get equations, similar to (12). They will however 
contain the indices 4, and-if we use the value 
we obtain an equation which is only slightly different from (13). 
The first term in it will be 
4 7 vt dh 
eM —— Aa 
a 
instead of 
ord 
Am v2 Ee a 1) M, 
2 
in (13), and in the following terms M as well as the coefficients 
must be written with the index h. 
Finally, by assuming similar relations between the coefficients as 
in § 5 above, this new equation will become nearly, but not quite 
identical with (4"), the difference consisting in this, that it will not contain 
