This book, "The theory and practice of finding the longitude at sea or land to which are added, various methods of determining the latitude of a place, and variation of the compass with new tables. 1", by Andrew Mackay, is a replication of a book originally published before 1810. 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.