This book, "Cometographie: Ou, Traite Historique Et Theorique Des Cometes, Volume 2 (French Edition)", by Alexandre Guy Pingre, is a replication of a book originally published before 1783. 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.