REPRESENTING MEASURED ARCS OF THE MERIDIAN. 397 



8. Prussian Arc. 



^gi —0^8 = —0-368 + 0-1 779 /> -0-2852 . q, 

 ^3^ — ^g = + 3-790 + 0-5433 J9 - 0-9157 • Q. 



9. Russian Arc. 

 Vg= + 0-248 + 0-9384 J9- 



1-3293 . q, 



^3^-079= +5-110 + l-6049i>-2-5184.g', 

 Xg3-x^= +5-939+ l-6337i>- 2-5741 -Q, 

 x^^-Xg= + 2-909 + 2-2809_p- 3-9289. y, 

 ^9*-^g= +5-276 + 2-8953^- 5-3824. g. 



10. Swedish Arc. 



a^'io - a?io = 0" 507 + 0-5839;) - 1*9711 • q. 



From these equations of condition I have obtained for each of 



the measured arcs the sums marked (m), (^a), [b), [am), {a a), &c. 



After the ehmination of x-^,Xci, x^, we have the data furnished by 

 different arcs for the equations serving to determiners and q. 



Thus we have for the determination of j9 and q the equations 

 = + 29-5073 + 47-6205 ;> + 96-8900 q, 

 = +61-9681 + 96-8900;y + 480-0273 q. 



