The youth's book on natural theology illustrated in familiar dialogues, with numerous engravings This book, "The youth's book on natural theology illustrated in familiar dialogues", by T.H. Gallaudet, is a replication of a book originally published before 1832. 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.