The red bud; the pawpaw; grape-vines of several species, and growing to a great size; sassafras; the black willow, confined to the streams; the box elder, the common elder, of two species; the sumach, of two species; several species of gooseberries; and a great many others too numerous to be mentioned here. Among the herbaceous plants we must not omit the ginseng, the Virginia snakeroot, the columbo, and the puccoon, two or three thousand pounds of the roots of which are annually carried by the inhabitants to our Atlantic cities. Among the trees, those belonging to the oak family are the most numerous, if not the most valuable. Split into rails, the farmer builds fences with them, and sawed into plank, boards, and scantling, they furnish materials for houses and barns. The sugar maple is sufficiently abundant, so that brown sugar enough is manufactured for domestic purposes. The sycamore is the largest tree along the river, and the poplar is the largest on the hills. The latter grows by the side of the maple and the beach, and is a most valuable wood for the house-builder and the cabinetmaker. This tree is frequently four and five feet in diameter, and continues of nearly the same size as it ascends, 40, 50, and sometimes even 60 feet. _Streams._ The Ohio is the eastern boundary of this county, forming wide intervales along its banks. Indian Wheeling is a fine mill stream rising in Harrison county, and after crossing this, empties into the Ohio, opposite the town of Wheeling, which stands on the Virginia side. Captina is another excellent mill stream, which after running about 17 or 18 miles in this county, puts into the Ohio 23 miles by water below Wheeling. These streams visit and fertilize a considerable part of Belmont. From the view we have taken of this county, its geology, mineralogy, and botany, the reader will probably be prepared with us to conclude, that no part of the union, of equal extent, contains within it greater natural resources, or can support a more dense population. The seat of justice is St. Clairsville, situated ten miles from the Ohio river, at Wheeling. It contains three houses for public worship, 15 stores, a printing-office, a bank, and 700 inhabitants. Many of the inhabitants of this county are Quakers or Friends, who are charitable, humane, frugal, enterprising, industrious, and strongly opposed to slavery. From such a population, possessing such advantages, what may we not hope and expect from their exertions? Their fertile valleys will be turned into meadows, and their hills into pastures; the ox will fatten in the former, whilst the flocks of Andalusia will whiten the latter. ART. IV. _Remarks on the Structure of the Calton Hill, near Edinburgh, Scotland; and on the Aqueous origin of Wacke; by_ J. W. WEBSTER, M.D. of Boston.