This memoir provides a comprehensive account of the geography and hydrography of the region straddling the Arctic circle, especially the Davis Strait and Baffins Bay. The author, John Purdy, a renowned hydrographer, utilizes his extensive experience to describe in detail the sea currents, ice movements, and the weather patterns of this region. Enriched with maps and detailed illustrations, this memoir is essential reading for anyone seeking to gain insight into the Northern Ocean and adjacent seas. 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.