Oilstone, of Ohio, xvi, 374.
—, of Georgia, xvi, 185.
—, of Lake Memphremagog, v, 41, 406.
—, of North Carolina, v, 262; xiv, 238.
Olbers, H. W. M., obituary of, xxxix, 387.
Old man of the Mountain, xiv, 64.f
Olea Americana, northern limit of, H. B. Croom, xxvi, 315.
Oligostachyum, iv, 58.
Oliver, B. L., on prussic acid, iii, 182.