400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=OEuvres+Descartes,+publiées:+Eloge+René+Descartes,+par+(A.+L.+Thomas.+Discours+méthode.+Méditations+métaphysiques.+Objections+aux+Méditations+avec+les+réponses+l'auteur+rené+descartes because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.