Please add punctuation to this: That was the problem of the attraction of an ellipsoid which was first studied in depth by Ivory whose solution was later generalised by Poisson Amsler extended the theorems of both Ivory and Poisson on this topic
That was the problem of the attraction of an ellipsoid, which was first studied in depth by Ivory whose solution was later generalised by Poisson . Amsler extended the theorems of both Ivory and Poisson on this topic.