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6 THOMPSON'S COAST PILOT. west longitude from Greenwich, is situated at a height of 600 feet above the Gulf of St. Lawrence, from which it is distant about 1,500 miles, by the course of its outlet and the St. Lawrence River. It is 460 miles long from east to west, and 170 miles broad in its widest part, with an average breadth of 85 miles; the entire. circuit being about 1,200 miles. It is 800 feet in greatest depth, extending 200 feet. below the level of the ocean. Estimated area, 31,500 square miles, being by far the largest body of fresh water on the face of the globe--celebrated alike for its sparkling purity, romantic scenery, and the healthy influence of its surrounding climate. About one hundred rivers and creeks are said to flow into the lake, the greatest part being small streams, and but few navigable except for canoes, owing to numerous falls and rapids. It discharges its waters eastward, by the straits, or River St. Mary, 60 miles long, into Lake Huron, which lies 26 feet below, there being about 20 feet descent at the Sault Ste. Marie, which is overcome by means of two locks and a ship canal. Its outlet is a most lovely and roman- tic stream, embosoming a number of large and fertile islands, covered with a rich foliage. Lake Micuieay, lying about 516 feet above the sea, is 320 miles long, 84 miles broad, and 700 feet deep; area, 22,000 square miles. This lake lies wholly within the confines of the United States. It presents a large expanse of water, with but few islands, except near its entrance into the straits of Mackinac, through which it dis- charges its surplus waters. The strait is 30 or 40 miles in length, and discharges its accumulated waters into Lake Huron, on nearly a level with Lake Michigan. At the north end of the lake, and in the straits, are séveral large and romantic islands, affording delight- ful resorts. yk Green Bay, a most beautiful expanse of water, containing sever- al small islands, lies at about the same elevation as Lake Michigan; it is 100 miles long, 20 miles broad, and 60 feet deep; area, 2,000 Square miles. This is a remarkably pure body of water, presenting lovely shores, surrounded by a fruitful and healthy section of country. Laxe Hvroy, lying at a height of 574 feet above the sea, is 250 miles long, 100 miles broad, and 750 feet greatest depth; area, 21,000 square miles, This lake is almost entirely free of islands,