_Lake Ontario_ is situated between forty-three and forty-four degrees of north latitude, and between seventy-six and eighty degrees west longitude. It is about two hundred miles in length and forty in width; its form nearly oval, and its circumference about six hundred miles. It abounds with fish of an excellent flavor, among which are the Oswego bass, weighing three or four pounds. Near the south-east part it receives the waters of the Oswego river, and on the north-east it discharges itself into the St. Lawrence. It is never entirely closed by ice, and is computed from some soundings to be five hundred feet deep. The _Ridge Road_, or _Alluvial Way_, is a remarkable ridge extending along the south shore of this lake, from Rochester on the Gennessee to Lewiston on the river Niagara, eighty-seven miles. It is composed of common beach sand and gravel stones worn smooth, and these are intermixed with small shells. Its general width is from four to eight rods, and it is raised in the middle with a handsome crowning arch, from six to ten feet. Its general surface preserves a very uniform level, bring raised to meet the unevenness of the ground which it covers. At the rivers Gennessee and Niagara, its elevation is about one hundred and twenty or thirty feet; and this is its elevation above Lake Ontario, from which it is distant between six and ten miles. There seems to be no way of accounting for this ridge, without supposing that the surface of Lake Ontario was one hundred and thirty feet higher at some former period than it is at present. There is a similar ridge for one hundred and twenty miles, on the south side of Lake Erie.