( 770 ) 



is'.il .7:. 

 Hi'lidiiieter. 



ISIII.- 

 l'latc 



and J902. Cookson found from (lie reduction of his oiiservations 

 that the residuals could be much reduced by assuming in the latitude 

 of satellite IV an ine(|uality of which the period is one half of the 

 periodic time of the satellite while the coefficient is about 50". I 

 have searched for this inequality in the observations of 1891, 1903 

 and 1904 and I can confidently declare that in none of these years 

 there is even the slightest trace of any inequality of which the argu- 

 ment should be a multiple of the mean longitude of Sat. IV. Since 

 also an inequality of this nature cannot be explained by the theory 

 I cannot but doubt its reality, and since the cause which has produced 

 this apparent inequality must necessarily also have affected the 

 determination of p^ and g-,, the safest course seemed to be to reject 

 iho values iif these elements found from l-hc observations of 1901 



