164: SECULAR VARIATIONS OP THE ELEMENTS OP 



^'=+0.0018108+596^+660^'— 2820/— 34V"— 25700/ F +9320/+17960/' 



+820/"; 

 ^"=+0.0016228+378^+1220^'— 1540/— 315/'— 23000/ F +7240/ 



|-15960/+-370/ /r ; 

 ^'"=+0.0011557+73^+300^+240/— 52/'— 15300/ r +1560 i u r +11040 /tf r/ 



— 690/ JJ ; 

 jV 6 /F =+0.0008794— 4^— 80^'— 20/— 3/'— 7400/ F +240/+8200/ 7 — 1170/"; 

 jV 6 =:+0.0007180— 4^— 60^'— 20/— 3/— 5900/ F +400/+6620/ J — 1140/ J/ ; 

 iV 6 F/ =— 0.0176872+35^+1100^'+280/+29/'+27800/ r — 29360^ F +9680/' 



—7850/"; 

 JV 6 r/ =+0.0019010— 4^— 600/— 40/— 9/'— 8800/ F — 7360^+18900^ 



-2640^". 



g 7 =— 25".934567— 0".000039^— 0".00196 /t '— 0".0043O/— 0".00223/'— 18".2906/ r 



— 7".35208/— 0".22692/ / — 0".05623^ F/J ; 

 /?,=306° 19'21".2— 2".4^— 242"/+128"/— 65".6/'+40"/ F +32> F — 1532> F7 



-191V"; 

 N 7 =— 0.0002652-1^— 300^'— 740/+73/'+1700/ F — 760^ F +20/ J +20^ F "; 

 iV 7 '=—0.0002932+40^+5840/+14100/— 102/'— 10300/ F — 8240^ r —220/ J 



—40^"; 

 iV 7 "=— 0.0027275— 93^—12780/— 5500/+1614/'+19000/ F —3520^ F +220^ F/ 



+170/"; 

 iV 7 '"=—0.0092499+1263V— 2700/— 13300/— 295/"+8700^ JF +5280 i u F 



+ 1340/ J +720,u r "; 

 iV/ F =+0.00630053+0^— 80/— 40/— 10/'— 44700/ F +44800^ F +720^ F7 



— 90^ r "; 

 iV 7 F =-0.0156928+3^+240/+200/+70/'-43400/ F +44640 l u F -3120^ FJ 



-40^"; 

 ^"=+0.0006890—1^— 20^'— 20/— 5/— 3300/ F +3040/+80 i u F '+100^ r "; 

 JV 7 F7 =+0.00007720+0^+0^'+0/-0.5/"— 290/ F +344/— 50/ z — 2^ F ". 



We have thus obtained the system of constants and the coefficients of their 

 variations, corresponding to the ecliptic of 1850, as the plane of reference; and we 

 shall now inquire what modifications are necessary in order to refer the same 

 quantities to the invariable plane of the planetary system. 



