This book, "Guide posts on the engineer's journey. Illustrated by numerous engravings and containing many useful tables. 1", by George Bates Nichols Tower, is a replication of a book originally published before 1889. 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.