Complex sentence: A list of Poisson's works, drawn up by himself, is given at the end of Arago's biography, A lengthened analysis of them would be out of place here, and all that is possible is a brief mention of the more important.
Split into simpler sentences: A list of Poisson's works, drawn up by himself, is given at the end of Arago's biography. All that is possible is a brief mention of the more important.