The Jarmuk, or Sheriat-el-Mandhur, anciently the Hiero-max, drains the water, not only from Gaulonitis or Jaulan, the country immediately east and south-east of the sea of Tiberias, but also from almost the whole of the Hauran. At its mouth it is 130 feet wide, and in the winter it brings down a great body of water into the Jordan. In summer, however, it shrinks up into an inconsiderable brook, having no more remote sources than the perennial springs at Mazarib, Dilly, and one or two other places on the plateau of Jaulan. It runs through a fertile country, and has generally a deep course far below the surface of the plain; ere falling into the Jordan it makes its way through a wild ravine, between rugged cliffs of basalt, which are in places upwards of a hundred feet in height. The Zurka, or Jabbok, is a stream of the same character with the Hieromax, but of inferior dimensions and importance. It drains a considerable portion of the land of Gilead, but has no very remote sources, and in summer only carries water through a few miles of its lower course. In winter, on the contrary, it is a roaring stream with a strong current, and sometimes cannot be forded. The ravine through which it flows is narrow, deep, and in some places wild. Throughout nearly its whole course it is fringed by thickets of cane and oleander, while above, its banks are clothed with forests of oak. The Jordan receives the Hieromax about four or five miles below the point where it issues from the Sea of Tiberias, and the Jabbok about half-way between that lake and the Dead Sea. Augmented by these streams, and others of less importance from the mountains on either side, it becomes a river of considerable size, being opposite Beth-shan (Beisan) 140 feet wide, and three feet deep, and averaging, in its lower course, a width of ninety with a depth of eight or nine feet. Its entire course, from the fountain near Hasbeiya to the Dead Sea, including the passage of the two lakes through which it flows, is, if we exclude meanders, about 130, if we include them, 360 miles. It is calculated to pour into the Dead Sea 6,090,000 tons of water daily.