“ Other northern affluents, as the Muskingum, the Scioto, and the Miami, descend, like the Allegheny, from the plain studded with lakes not far from Lake Erie. The southern affluents are larger, and rise, like the Monongahela, among the upland glades of the Appalachians or on the Appalachian plateau. The Kanawha (navigable to Charleston, W. Va.) and the Licking traverse salt-yielding regions. The Kentucky River (navigable to Beattyville, Ky.) joins the Ohio above the Louisville Rapids and marks the natural division between the middle and lower courses of the river. ”

“ Many fine towns and cities border the Ohio, the larger places standing chiefly at the mouths of the affluents. Below Louisville the valley broadens and the skirting hills retire to a great distance from the river banks. As the larger part of the drainage comes from the mountain districts, the Ohio is unable in times of very heavy rainfall or rapid thaw of the winter's snow to carry off the vast quantity of water suddenly emptied into it. ”

“ Its mean rate of flow is 3 miles an hour, and its mean fall is about .70 of a foot to the mile. The Allegheny and Monongahela are regarded as having equal claims as the source of the river, though the Allegheny is longer, with 123 miles of navigation. The Allegheny rises on the plateau of northern Pennsylvania west of the Allegheny Mountains, drains Lake Chautauqua in New York, and descends through a series of narrow valleys to its junction with the Monongahela. ”