—, method of conducting surveys of, in the state of New York, E. F. Johnson, xxiv, 19.f
—, Erie, tolls on, x, 398.
—, of Ohio, xx, 416; xxv, 241.
—, Ohio and Pennsylvania, xxxi, 40.
—, of Pennsylvania, E. Miller, xxv, 85; xxvi, 108.
—, route of the Michigan and Illinois, C. U. Shepard, xxxiv, 138.
—, Louisville and Shippingsport, Ky., xiv, 65.f
Canal, Welland, U. C., account of, W. H. Merritt, xiv, 159.f
—, to connect Lake Superior with Lake Huron, xlvi, 213.
—, locks at Cincinnati, Ohio, plan of, D. Lapham, xxiv, 70.f