and Indian Arcs, and the Figure of the Earth, 149 



III. The Indian Arc, 

 - 12-4024 + 46'2615U 3 + 36-1816V 3 - 0'1979(* 3 ) = 0, 

 - 99179 + 36-1816U 3 + 28-5091V 3 + 7-7767(f 3 ) = 0, 



or 



- (1-0935057) + (1-6652197) U 3 + (1-5584878) V 3 



-(I -2964458) fe)=0, 

 -(0-9964197) + (1-5 584878) U 3 + (1*4549835) V 3 



+ (0-8907953) (/ 3 )=0, 

 - (2-5484892) + (3-1202032)\U 3 -(0-7514293)l (* 8 )=0, 

 + (2-5549075)-(3-1169756)J -(2-4492831) J 

 = -353-58 + 1318-91 U 3 - 5-641 (/J 

 •4-358-85-1309-1 J -281 -37 J 



5-27+ 9-8 U 3 -287-01 fe)=0, 



or 



(0-7218106) + (0-9912261)U 3 - (2-4578970) (t 3 ) =0; 



.-. U 3 = (1-4666709) - (1-7305845) . 

 Also 



V 3 = (1-5350179)- (0-1067319) U 3 + (3-7379580) (/ 3 ) 



= (1-5350179) - (1-5734028)1 (g, 

 + (1-8373164) + (3-7379580) J 



= 0-34278 - 37-4461 (t 3 ) = 1 -03035 - 37-441 (/ 3 ) 



+ 0-68757+ 0-005 J 



= (0-129848) -(1-5733474) (* 8 ) ; 



a z+ bs = 20890000 -2089U 3 ; 2089 = (3-3199384) ; 



= 20890000 + (3-0505229) - (4-7866093) (/ 3 ) 



= 20890000 + 1123-61180fe) = 20891123-61180fe) 



= (7-3199618) - (4-7866093) (/ 3 ) ; 



«3-*3_ 1 f«s+h +417800VT 41 78= (3-6209684). 

 -^r-G06V~T~ + ' 3 J 600= (2-7781513)' 

 _1_ f (7-3199618) - (4-7866093) 1 (t 3 ) 

 600 L + (5-6339532) - (7-1943158) J 

 = (4-5418105) - (2-0084580)1 {t 3 ) 

 + (2-8558019) - (4-4161645) J 

 = 34818-5- 1021 (/ 3 ) = 35536-26l73(Q; 

 717-5 -26071 J 

 .-. ff 3 =20926659-87353(^ 3 ), 

 & 3 =20855587-35007(/ 3 ). 



