— —, review of, xi, 238; xii, 28, 330; xiii, 311.
Niagara and its vicinity, geological features of, iv, 35; xi, 213.f
—, on the falls of, H. D. Rogers, xxvii, 326.f
— falls, retrocession of, J. B. Gibson, xxix, 204.
— —, —, G. E. Hayes, xxxv, 86, 100.
— —, remarks on, J. Hall, xxxvi, 49.
—, on the pressure of the atmosphere, &c., within the cataract of, B. Hall, xiii, 364.
— river, volume of, Z. Allen, xlvi, 67.f
Nichols, G. W., popular notices of Mount Washington, xxxiv, 73.
Nickel, a test for potash, xvi, 387.