2-l(i Observafiofis o)t the Dnrcfion und Iii/ensiti/ of (he [AruiL 



taking the sum we get 









— 8560 ij 





246207,5 



and for the 



second series 



o^'i'vi.' .r 



+ 102CK)// 





4- 61860,0 





4- 1 1;\60 





4- 108136,0 





-)- 4 100 





4- 21662,0 





+ 2772 



= 



4- 9336,r) 



4o/4 



+ 4374 





+ 8291,4 



-132 











+ 60 



— 



— 1 26,0 



Ho 



+ 56 





f 267.4 



1922 



r 744 





j- oJo/,\J 



6S32 



f 2808 





+ 7311,6 



103(38 



+ 4608 





4- 22867,2 



17787 



+ 5082 





4- 39177,6 



13778 



4- 9794 





4- 30876,0 



taking the sum we get 







146855 X 



+ 60286 7/ 





320611,4 



und for the third series 



1458 



z— 3564 



!/ = + , 982,8 



2450 



— 36-10 



= + "6363,0 



5184 



— 9936 



= 4- 1 1865 6 



6400 



— 6880 



= 4- 145I2,IJ 



21316 



— 7008 



= -f 46077,6 



20412 



+ 1890 



= 4- 45397,8 



1800 



4- 480 



= + 3978,0 



6936 



- 9381 



= + 19!96,4 



18496 



—16018 



= + 40228,8 



13148 



-10660 



= 4- 24058,8 



61605 



—41070 



= +132090,0 



taking the sum we get 



— b560.r-) 1579// 





17268,6 









l iOOKf -f- l/iiZ 





3.')1 11, 'i 



4100 . 1000 



= + 



8968,0 



2772 + 1452 





4890,6 



437 4 4- 4374 



= t 



8294,4 



828 f 1587 



= f 



11)38,9 



60 -h 50 





105,0 



56 4- 32 



= f 



152,8 





= + 



1521,0 



2808 -f 1352 



= + 



3520,4 



4608 -r 2048 



= 4- 10163,2 



5082 + 1152 





11193,6 



9794 4- 6962 





21948,0 



60286 X + 29397 y= r296&r),5 



— 3564 x 4- 



8712?/ 





- 2402,4 



— 3640 





5408 





— 9453,6 



- 9936 





19014 





—22742,4 



— 6880 



+ 



7396 





- 15600,4 



— 7008 





2304 





-15148,8 



4- 1890 





175 





+ 4203,5 



4- 480 





128 





+ 1060,8 



~ 9384 



+ 



12696 





—25971,6 



—16048 



+ 



13924 





-349(>4.4 



-10660 



-f- 



8450 





-19071,0 



-41070 



-\- 



27380 





-88060,0 



159505 X -105820 y - 344750,8 —105820 x + 105617 y ~ -228090,3 



Resolving these three pairs of equations, we get 



X y 



+ 2,07218 4- 0,29708 



2.35365 — 0,41532 



2,17310 + 0,01770 



and since x — r sin. 9 and y =i r cos. 6] we get 

 — = tan. 0 or in numbers. 



