and 



^1 - - , {*!} 



-ni' Ql 



(68) 



The derivative of Equatton (66) with respect to C is 



6F 1^1 



i I' R e 



- pv § 



-ik(C - C ) 



dk 



ac c - Co c - Co n 



k - k. 



(69) 



- 2n k e 



-i k n (C - C„) 



o v ^ ~o' 



Integrating the last equation with respect to Sj(q^) we obtain 



/ ~ d 3j (qj) - -(ccs 0J - i sin Bj )[in r j+1 + i9 j+1 - In Cj - 19^ 



- (cos o + i sin a )[ln r j+1 + i6 J + 1 - In r - 18 ] 



— (cos 6, + i sin a )|pv 







k(z + 2 o j+1 > r 



e [ 



cos k.(.x - x. 



d v k(z + z Q ) 

 sin k(x - x 0lJ _,)J - pv | : -_ — e J [cos k(x - x ) 



v °i+r 



4 k ~ k o 



21 



