This text is missing some spaces, please add them: InthefirstSurlesinégalitésdesmoyensmouvementsdesplanèteshelookedatthemathematicalproblemswhichLaplaceandLagrangehadraisedaboutperturbationsoftheplanets.
In the first Sur les inégalités des moyens mouvements des planètes he looked at the mathematical problems which Laplace and Lagrange had raised about perturbations of the planets.