A manual of the protracting trigonometer with its application to rectilinear draughting and plotting, trigonometry, and surveying This book, "A manual of the protracting trigonometer", by Josiah Lyman, is a replication of a book originally published before 1862. 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.