1175 



8. Foi' the numerical compulation of the perliii'hatioiis <i(i,ife,(fl,t^(^ 

 we take M 



e' = 0.02870. 



From the period of libration we (iediiceci '■') : 



1 



3986 



ft' 



from the motion of the pericentre '): 



1 



= 4080 



(^' 



Takiïig the mean of these values, we get : 



1 



- z= 4033, 



hence : 



ffnr 0.0157. 



Neglecting terms of the order one and higher in /( of the developments 

 of (^I,ög,éa,(fe, which have been given at the head of each table of 

 the preceding section, we get for <f/,öff,(fa,<fe the values collected in 

 the following table. 



The agreement of the coefficient of co.^^ in <fe with the value 

 derived from observation by H. Stkcvk '), \ iz. + ().()28(), is very 

 satisfactory. 



1) Investigations, p. 71. 

 3) 1. c, p. 70. 



») Proceedings, Vol. XXI, N". 6 and 7. 



^) Publications de I'Obseivatoire Contra! iNicolas. Série II. Vol. XL Beobacli- 

 tuBgen der Salurnstrabanten. St. Pétersbourg, 1898. p. 29U. 



76* 



