Written in the early 20th century, Longitude by Lunar Distances is a fascinating exploration of the history of navigation and the innovative tools that enabled sailors and explorers to accurately chart their course across the seas. This detailed and technical text is a must-read for anyone with an interest in the history of science and technology. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.