rel Mountain, in Virginia, thence meandering in a N. by E. direction, passes into Pennsylvania, and receives Cheat river from the S. S. E. Thence winding to a N. by W. direction, separates Fayette and Westmorland from Washington county, and passing into Allegheny county receives the Youghiogheny river at Pittsburgh, fifteen miles below the mouth of the former, and by land, fifty-five below Cheat. The Monongahela is about 450 yards wide at its mouth, measuring from the top of bank to bank, and in the fall and spring freshes has water enough to carry ships of 400 tons burthen; these, however, subside quickly and render the navigation for such vessels very precarious. One great difficulty attending the navigation of vessels of burden down this river arises from the almost impossibility of keeping them in the proper channel, it being in many places very narrow, and full of short turns around points of islands which are numerous. This observation will also apply to the Ohio, especially as low down as Wheelen [Wheeling], ninety miles below Pittsburgh."
The waters of the Monongahela River,
