( 419 ) 



that no further improvement could be expected from alterations in Jt, 

 ip or n ; at the end I will add a few words on these elements. So 

 we must try to bring it about bj variations in the position of the plane 

 of the orbit, viz. of i and ^, and for this reason I determined the relation 

 between those elements and the computed places of the comet. As 

 from the two suppositions A M = -\- 50" seems to be nearer to the 

 truth, I computed the appai-ent places of the comet : for A J/ =: -f" ^^" 

 Ai=-{-10" and AcTl = and also for AJ/= + 50" Ai = 

 AcH) = — 10". Probably a somewhat larger value of AcTl 

 had been more convenient. The following table gives the variations 

 of a and Ö in the two cases. 



TABLE VI. 



The numbers from the tables V and VI give the following values 

 of the differential quotients of a and ö with respect to M, i Sind ^, 

 which will be used as coefficients in the equations of condition. 



