=Height of Hills and Mountains.=--It is interesting to hear the opinions of different people journeying up and down the Hudson as to the height of mountains along the river. The Palisades are almost always under-estimated, probably on account of their distance from the steamer. It is only when we consider the size of a house at their base, or the mast of a sloop anchored near the shore, that we can fairly judge of their magnitude. Various guides, put together in a day or a month, by writers who have made a single journey, or by persons who have never consulted an authority, have gone on multiplying blunder upon blunder, but the United States Geological Survey furnishes reliable information. According to their maps the Palisades are from 300 to 500 feet in height, the Highlands from 785 to 1625, and the Catskills from 3000 to 3885 feet. * * * Beneath the cliffs the river steals In darksome eddies to the shore, But midway every sail reveals Reflected on its crystal floor. _Henry T. Tuckerman._ * * * THE PALISADES. At Fort Lee 300 feet. Opposite Mt. St. Vincent 400 " Opposite Hastings 500 " THE HIGHLANDS. Sugar Loaf 785 feet. Dunderberg 865 " Anthony's Nose 900 " Storm King 1368 " Old Cro' Nest 1405 " Bull Hill 1425 " South Beacon 1625 " THE CATSKILLS. North Mountain 3000 feet. Plaaterkill 3135 " Outlook 3150 " Stoppel Point 3426 " Round Top 3470 " High Peak 3660 " Sugar Loaf 3782 " Plateau 3855 " =Sources of the Hudson.=--The Hudson rises in the Adirondacks, and is formed by two short branches. The northern branch (17 miles in length), has its source in Indian Pass, at the base of Mount McIntyre; the eastern branch, in a little lake poetically called the "Tear of the Clouds," 4,321 feet above the sea under the summit of Tahawus, the noblest mountain of the Adirondacks, 5,344 feet in height. About thirty miles below the junction it takes the waters of Boreas River, and in the southern part of Warren County, nine miles east of Lake George, the tribute of the Schroon. About fifteen miles north of Saratoga it receives the waters of the Sacandaga, then the streams of the Battenkill and the Walloomsac; and a short distance above Troy its largest tributary, the Mohawk. The tide rises six inches at Troy and two feet at Albany, and from Troy to New York, a distance of one hundred and fifty miles, the river is navigable by large steamboats. * * *