XII.] THE EVECTION AND THE MOTION OF THE APSE. 57 



The values already found for the remaining quantities are sufficiently 

 exact. 



These numbers give, taking after Hansen, 



e(l+b ) = -05491 



e = -05449 



2 (1 + &) e = '10982,0 = 2265l"'9 

 a n e= -00986,03 

 & 21 e = -02228,44 = 4596"-6 

 ct 22 e = -00060, 93 

 b^e = -00084,85= 175"'l, 



and taking the Moon's mean annual motion 17325593", the annual motion 

 of the apse is 



148202" = 41 10' 2". 



A. II. 



