of the state. The river takes its rise in Otsego Lake, and, flowing southwest to the Pennsylvania line, receives Charlotte River from the south and the Unadilla River from the north. After a course of a few miles in Pennsylvania, it again enters New York and flows in a general westerly direction to near the western border of Tioga County, whence it turns south and again enters Pennsylvania. Its principal tributary from the north is the Chenango River. The Tioga River enters New York from Pennsylvania near the eastern border of Steuben County, flows north, receives the Canisteo River from the west and the Cohocton River from the north. From the mouth of the latter, the stream takes the name Chemung River, and flows in a southeast direction, into the Susquehanna River in Pennsylvania, a few miles south of the state line. The upper course of these streams is generally through deep ravines bordered by steep hillsides, but below they are bordered by wide intervales. The Delaware Basin occupies Delaware and Sullivan counties and portions of several of the adjacent counties. The north or principal branch of the river rises in the northeast part of Delaware County and flows southwest to near the Pennsylvania line; then it turns southwest and forms the boundary of the state to the line of New Jersey. Its principal branches are the Pepacton and Neversink rivers. These streams all flow in deep, narrow ravines bordered by steep, rocky hills. The basin of the Hudson occupies about two-thirds of the east border of the state, and a large territory extending into the interior. The remote sources of the Hudson are among the highest peaks of the Adirondacks, more than above sea level. Several of the little lakes that form reservoirs of the Upper Hudson are above sea level. The stream rapidly descends through the narrow defiles into Warren County, where it receives from the east the outlet of Schroon Lake, and the Sacandaga River from the west. Below the mouth of the latter the river turns eastward, and breaks through the barrier of the Luzerne Mountains in a series of rapids and falls. At Fort Edward it again turns south and flows with a rapid current, frequently interrupted by falls, to Troy, from the ocean. At this place the river falls into an estuary, where its current is affected by the tide; and from this place