—, Indian mounds or fortifications in, iii, 36.
—, — —, R. C. Taylor, xxxiv, 89.
—, contributions to the botany of, L. C. Beck, x, 257; xi, 167; xiv, 112.
Mitchell, E., on the effect of quantity of matter in modifying the force of attraction, xvi, 234.
—, on the geology of the gold region of North Carolina, xvi, 1.f
—, North Carolina, character and origin of the low country of, xiii, 336.
—, on the proximate causes of winds and storms, xix, 248.f
—, Protogæa of Leibnitz, xx, 56.
—, on storms and meteorological observations, xx, 361.
—, on Welther's tube of safety, xvii, 345.f