The Riunkan-fos is another Norwegian cataract in the outlet of Lake Mjösvard, which pours through a wild, rock-studded slope until it reaches a precipice, on the brink of which it is divided by a huge mass of rock into two channels. Thence it falls eight hundred and eighty feet into a dark basin at its foot, from which water-rockets and sharp jets of foam shoot up and out in all directions. The intense whiteness of the fleecy column is indescribable.
A still more famous Norwegian cataract is the Sarp-fos in the Stor-Elven, formed by the junction of the Lougen and Glommen, the largest of the Norwegian rivers. Like the Riunkan-fos the stream is greatly contracted in a rocky gorge, and at the edge of the cliff is divided into two channels which, however, soon unite in a fall of one hundred feet upon huge masses of rock, through and over which it rushes tumultuously for a short distance, and then flows quietly into the sea. The volume of water is unusually large for a purely mountain river, being in the gorge at the top of the fall one hundred and fifty feet wide and forty feet deep. The massive and intensely white column contrasted with the dark green foliage of the solemn pines, and the darker rocks about it, and the deep blue water into which it falls, produce a vivid impression on the mind of the beholder. The Stor-Elven here presents the curious phenomenon of a stream changing, not from a perpendicular fall to a rapid, but the reverse, from a rapid to a perpendicular fall. A great portion of the right bank of the river at the fall, and for a considerable distance below, is chiefly composed of a stiff blue clay, and the river once flowed past Sarpsborg, a mile below, in a succession of magnificent rapids. At that time a superb mansion with numerous out-buildings stood at the termination of the rapids. On the 5th of February, 1702, the mansion, together with everything in and about it, sunk into an abyss six hundred feet deep, and was entirely buried beneath the water. The walls of the house were of unusual strength and thickness, with several high towers, but the whole was buried out of sight. Fourteen persons and two hundred head of cattle were also engulfed. The catastrophe was caused by the washing out of the blue clay, and the undermining of the bank, which then toppled over into the watery chasm.
Upper Falls of the Yellowstone
In Switzerland is the Staubbach—dust-stream—a well known fall in the canton of Berne. It has a sheer descent of nearly nine hundred feet, in which the water is converted into spray that is easily moved by the wind, thus giving it a singularly beautiful resemblance to a white curtain floating in the air.
In South Africa, Livingstone has made the public acquainted with that extraordinary hiatus in the crust of the earth in which the great river Zambesi is swallowed up. A stream more than a thousand yards wide, dotted with islands, flowing between fertile banks clothed with the luxuriant and gorgeous vegetation of the tropics, without the least preliminary break or rapid, suddenly drops into a dark chasm of unknown depth, which, repeatedly doubling on itself, pursues its tortuous course some forty miles through the hills before emerging again into the sunlight. "From Kalai," says Livingstone, "after some twenty minutes' sail we came in sight of the columns of vapor appropriately called smoke. * * * Five columns now arose, and, bending in the direction of the wind, they seemed placed against a low ridge covered with trees. The tops of the columns at this distance (six miles) appeared to mingle with the clouds. The whole scene was extremely beautiful." At the brink of the chasm he found the river divided into two channels of unequal width by a large island called the "Garden," on account of its rich vegetation. "Creeping with awe to the verge I peered down into a large rent which had been made from bank to bank of the broad Zambesi, and saw that a stream a thousand yards broad leaped down a hundred feet and then became suddenly compressed into a space of fifteen or twenty yards. In looking down into this fissure on the right of the island one sees nothing but a dense, white cloud. From this cloud rushed up a great jet of vapor exactly like steam, and it mounted two hundred or three hundred feet high; then, condensing, it changed its hue into that of dark smoke, and came back in a constant shower. This shower fell chiefly on the opposite side of the fissure, and a few yards back from the top there stands a straight hedge of evergreen trees, whose leaves are always wet. From their roots a number of little rills run back into the gulf, but as they flow down the steep wall the column of vapor in its ascent licks them up clean off the rock, and away they mount again. They are constantly running down, but never reach the bottom."
The Staubbach, Switzerland