23 
Hence we find from (64) and (65) 
da, 
gus 
dy, ; 
ar b' dx, 
da. 
= = = 0 
S 
dy, ; 
dx, 
s eade, (66) 
S 
dy. 
S 
dus ; 
SR b. d, 
dy 
d = b'dx, —20 dx, 
S 
dx 
= = — b dx, 
dy 
A — 9 b' dx, — b' dx, 
S 
dag 
+ = D dx, 
S 
dy, 
25 22 29 du, — b dn, 
S 
According to (61) and (62) we have the weight- and correlation- 
numbers 
9 h^ 8 d^ 12 h? d? 
Qu Qua 7 ESO AT (67) 
Y 2,26 U X363 12 5? q4 
9 h4 + 4 d* + 12 h? d? 68 
On, = T 12 TE es