A SUPPOSED SUBTERRANEAN RIVER.

A SUPPOSED SUBTERRANEAN RIVER.

A despatch from Duluth, Minn., says: “A sink hole has been discovered on the St. Paul and Duluth road, at Mission Creek, a few miles south of Hinckley, by workmen who were raising the grade. Soon after the track began sinking. It must have been sustained on a mass of roots and vegetable matter floating on the water below, and the additional weight put on the mass by the filling in broke down the support. For three weeks past more than 100 car-loads of filling a day have been dumped into a space no more than ninety feet wide, and the track is in fair shape again at this point, but another spot a short distance away is sinking out of line.

“The surface of the swamp is seamed and cracked in all directions, and in some places upheaved and turned completely over. In one place a pile of ties has been carried forty feet away. In holes that have been opened sounding lines have been dropped down thirtyfive feet without finding bottom, and a number of curious specimens of fish have been caught. It is believed that there is a subterranean river, as the fish caught do not live in the swamp pools.”

TO DAM THE OHIO.—An Allegheny (Pa.) man has written a letter unfolding a scheme to dam the Ohio from Pittsburgh to Cincinnati, to cost $16,000,000. His plan is to construct stone dams to extend about half way out into the river, which will cost $200,000 each. He proposes to place one dam on the right bank of the river, and a few miles below build another dam on the left bank, alternating thus all the way down the river. By this means, he claims, a current of eight feet deep can be had during the entire year in the centre of the river, for a width of 100 feet.

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