( 60) 



TABLE VI. 



Grudiënlellipse of tlie monodiunial variation, 

 de Bilt. 



The elements of ihe ellipse are deduced from the expressions 



V ^^ A cos {nt — Cj) Cj — C.^ = L. 



u ■=! B cos {nt — C^) 



by means of the well known formulae : 



2 AB cos A 



