15
3) 9 <P 11
Combine Ila with the left side of la until the line PR, then with
lib; if <p (J; combine lib with Ilia etc.
4) ii 9 in—4
Select the corresponding direction in the figure. Its number
must be in scale Ila. The numbers of these two directions differ
by 5 or a multiple of it. All factors where i />.5>iJj>w+i p. 5
are zero. E.g. of the row 14,^ all cofactors 14,15 are zero
and 14,6 is given by 9,1.
5) in4
Combine the left part of Illb with lie, and then with lb, IVc
and the right part of 11 lbAll cofactors in which in10 <>\i> \n -f-11
are zero.
6) To obtain the real value of the cofactors the given numbers
have to be divided by 48.
E.g. In a chain of 5 quadrilaterals n= 52.
The row r9 e9, R eA becomes
R
<P
7) r1B e1B, yt -(- e^ r6 e6, R -\- e^\
A
1
1
1
1
1
i\
1
1
1
1
1
9
1
1
1
n -
a
1
n -
Q
Fig- 5