892 



of the argument of the libration (Investigations p. 70) (which value 



also has been derived on simplifying suppositions), viz. : 



M 



— = 3986. 



m 



M 



The values of — computed by Eichelbergek and Samter from the 

 m' 



perturbations of Hyperion are: 



W. S. Eichelbergek: 4172 =b 58, 

 H. Samter: 4125. 

 Thus the agreement of the different values is satisfactory. 



