144 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



(Vol. XIV. 



perturbations are developed on the basis of osculating elements, namely, that the perturbations 

 and their fu-st derivatives shall be zero at the time t = 0. The relations to be satisfied are 



« =01 



=.If7'p.,ijPij'?ain .-l+n({.K',(cos £-<;)+.?■, sin £}+r,(coa £-«)+f5 8in £ 



