Published in 1862, this book is a technical report on the determination of the positions of Feaghmain and Haverfordwest longitude stations on the Great European Arc of Parallel. It is an important document in the history of geodesy and surveying, and it provides valuable insights into the scientific methods used to measure the earth's surface. This book is a must-read for surveyors, cartographers, and anyone interested in the history of scientific measurement. 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.