and Indian Arcs, and the Figure of the Earth. 151 



or, rejecting 3 from all the indices, 



41251 ft) + 45031 ft)- 1456 

 126321 J -303247 J -87941 



130446 ft) -298744 ft) -89397=0, 

 or 



(5-1 154308) ft) - (5-4752992) ft) - (4*9513229) = ; 



.-. ft) = (1-6401316) ft)- (1-4760237). 

 For the third equation, 

 (8-2299741) ft) -(9-8825556) ft) -(7-691014) 1 ==0 . 

 ; 4- (8-4047325) ft) + (9-0883098) ft) - (8-2224911) J 



or, rejecting 3 from all the indices, 



1 698141 ft)- 76305451 ft)- 49092 

 + 253941 J +1225490 J -166913 



423755 ft)-6405055 ft) -216005=0, 

 or 



(5 -6271 149) ft) - (6-8065228) ft) - (5-3344639) = ; 



.-. ft) = (2-8205921) ft) - (2-5279411) . 



Substituting for ft) and ft) in equation (a), we have 

 (5-0523091)] ft) + (4-5630807) =0, 

 -(4-7271886) f -(3-4528765) 

 + (3-7455275) J - (4-8671551) 



or 



1128001 ft) +36566 

 + 5566 > - 2837 

 - 53357 J -73647 

 65009 ft) -39918=0, 



or 



(4-8129735) ft) = (4-6011688); 

 .-. ft) = (17881953) = 0"-610; 

 .-.(g = (1-4283269) -(1-4760237) = 0-268-0-299= -0''-031, 

 and 



ft) = (2-6087874) - (2-5279411) =0-041 - 0*034 = 0"-007. 

 4. When these values are substituted in the values of a lt a 2i 

 a 3> b\t && ^3) these latter become 



a l = 20926035, b x = 20855242, 



a 2 = 20926469, b 2 = 2085 5329, 



g 8 = 20926048, b 3 = 20855342'. 



average =20926184 20855304 



