32] 



REMARKS ON SIR GEORGE AIRY'S NUMERICAL LUNAR THEORY. 265 



latitude, the theory would have been quite competent to give the third 

 coordinate with the same degree of precision as had been attained in the 

 case of the two other coordinates. 



The following table, which is reduced from the table given in pp. 398, 

 399, of Vol. XLIII. of the Monthly Notices, R. A. S., shews the proportional 

 values of the coefficients of parallax as found by me, mainly after Ponte- 

 coulant, when compared with those employed by Sir George Airy after 

 Delaunay. 



Argt. My Coefficient. 



10000000, 



1 544989, 3 

 2D-1 100236,0 



2D 82493, 6 



21 29716,6 



2D + 1 9029,0 



2D-S 5595,6 



2D-1-S 4234,0 



l-S 3380,7 



D 2773, 



l + S 2770,0 



2f-l 2074,6 



31 1835, 



1753,2 

 1168, 8 

 675,0 

 894, 1 

 1087, 

 897,05 



W-l 

 S 



2D-1 + S 



2D + S 



4D-21 



2D-21 



2D + 21 



2D + 1-S 



4Z) 



D + S 



2D-2f 



21-S 



2D-31 



D + l 



21 + S 



2D-2/-1 



2D-2S 



821, 



648,7 



759,7 



423,7 



309,7 



359,4 



338,95 



309,7 



292,2 



251,3 



260, 05 



Delaunay's. 



10000000, 

 545145, 6 

 99822,4 

 82329, 2 

 29796, 4 

 8950, 8 

 5482,2 

 4243, 1 

 3074, 5 

 2739, 9 



- 2664,0 



- 2068, 25 

 1844,7 

 1458, 2 

 1248,4 

 1107,0 



957, 1 

 906, 9 

 809, 3 

 790,9 

 574,7 

 572,6 

 440, 3 

 319, 

 300, 9 

 295,7 

 283,7 

 267,9 

 238,4 

 222,0 



A. 



34 



