Sur la generation des courbes par roulement Sur la generation des courbes par roulement. This book, "Sur la génération des courbes par roulement", by René de Saussure, is a replication of a book originally published before 1895. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.