This book, "The underground haulage of coal by wire ropes including the system of wire rope tramways as a means of transportation for mining products : A practical essay written for John A. Roebling's Sons Co. 1", by Wilhelm Hildenbrand, is a replication of a book originally published before 1884. 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.