592 FORMATION OF THE EQUATIONS OF CONDITION. 



1 8 4 = 2 9 (F 9 ) + [2, (FJ + 2 9 (F,)] cos 40 + [2. (F,) + 2 9 (F 7 )] cos 80 

 - [2, (F,) + 2 9 (F,)] cos 60 - [2, (F<) + 2 9 (F 5 )] cos 20 ; 

 1 86 4 = [2, (F,) - 2 9 (F 8 )] sin 40 + [2, (F s ) - S 9 (F,)] sin 80 



+ [2, (F t ) - 2 9 (F,)-] sin 60 + [2, (F t ) - 2 9 (F.)] sin 20 ; 

 1 80, = F - ,P 18 + (^ - ^ - F + F) cos 50 - (F, - F w - F K + F u ) cos 80 

 - (F t - F u - F^ + F a ) cos 30 -(F 4 -F lt -F a + F K ) cos 20 - (F t - F n -F^ + F 3l ) cos 70 



- (F. + F lt -F u - F 32 )sin20 - (F 5 + F a - F yi - F 3l ) sin 70 - (F. + F a -F M - 1^) sin 60 



- (F 7 + F n -F a - F a )sm 10 + (F, + F,, -F. x - F w )sm 40 + F,-F a ; 



1 8 7 = F - F 1S + (F, - F 17 - F ia + FJ cos 70 - (F t - F u - F w + F) cos 40 



+ 2 9 ( J F 6 )]cos60 

 + 2 9 ( J P 8 )] 

 1 86 8 = [2, (F,) - 2.(F,)] sin 80 + [2, (F t ) - 2 9 (F 7 )] sin 20 - [2.(F.) - 2 9 (F 6 )] sin 60 



18a 10 = 2 9 ( F t ) - [2. ( F,) - 2, ( F 8 )] cos 80 - [2. ( F t ) - 2. ( F 7 )] cos 20 

 + [2, ( + F.) - 2, ( F,)] cos 60 + [2, ( F 4 ) - 2. ( F,)] cos 40 ; 



