The New International Encyclopædia/Great Slave Lake

GREAT SLAVE LAKE. An extensive and irregular sheet of water in the Territory of Mackenzie, Canada (Map: Northwest Territories, F 2). It has an area of 7100 square miles. Its greatest length is about 300 miles, and its greatest breadth 60 miles. It is surrounded, especially on the north, by rugged and precipitous shores; it contains many islands, some of them wooded, and is wholly frozen over for six months of every year. On the north it receives the surplus waters of Lakes Aylmer and Artillery, and on the south those of Lake Athabasca through the Great Slave River. Its own surplus is carried off by the Mackenzie River to the Arctic Ocean.