The _Hudson_, or the _North River_, is formed by the confluence of the _Hudson proper_ and the _Mohawk_, which unite below Waterford, ten miles above Albany. The Hudson takes its rise in the forty-fourth degree of north latitude, from the foot of the mountains which separate the waters of the St. Lawrence from those of Lake Champlain, and the Mohawk in the table-land surrounding Oneida lake. The Mohawk river rises to the north-east of Oneida lake, about eight miles from Sable Water, a stream of Lake Ontario. It runs first twenty miles south to Rome; then south-east one hundred and thirty-four miles; and, after receiving many tributary streams in its course, falls into the Hudson by three mouths. It is a large stream of water; and is now navigable for boats from Schenectady to Rome, one hundred and four miles distant. From Albany to Schenectady is a portage of sixteen miles, on account of the falls and rapids, which render the river unnavigable. These falls and rapids, denominated the _Cohoes_, are three miles from the junction of the Mohawk with the Hudson. The river is one thousand feet wide at these falls; the rock over which the stream descends is forty feet perpendicular height; and the whole height of the cataract, including the descent above, is seventy feet. Properly speaking, the North river is no other than a narrow gulf of the sea, entering inland at New York, and penetrating across the double chain of the Alleghany Mountains, as far as the confluence of the above mentioned streams, one hundred and seventy miles from the sea. This is what distinguishes the Hudson from all other rivers in the United States. In no other does the tide ascend beyond the first range; but in the North river, it crosses the first chain at West Point, sixty miles north of New York; and the second at Catskill, after having burst the beds of granite which opposed its passage, and cut them into a thousand different shapes. Hence the deep valley of the Hudson has derived a most singular and magnificent aspect; the western bank being, in some places, five hundred feet of perpendicular height above the level of the river.[12] Along the shore of the Hudson, a mural precipice extends twenty miles. It commences at Weehawken, four miles north of the city of Jersey, gradually rising towards the north, and mostly occupied by forests. It is known by the name of the Palisadoes. Illustration: Palisadoe Rocks. _Raritan River_, in the northern part of New Jersey, is formed by two branches which unite about twenty miles above New Brunswick. It becomes navigable two miles above that city, at a place called Brunswick Landing. Flowing by New Brunswick, and gradually becoming broader and deeper, it passes Amboy and then widens into Raritan bay, which is immediately connected with the ocean. It is navigable for sloops of eighty tons as far as New Brunswick, seventeen miles.