Nile, the mouth of, xxviii, 24f, 28.
Nineveh, ruins of, A. Smith, xlix, 113.
Niobium, new metal, xlviii, 400.
Nitrate of lime and of potash, i, 65.
—, of silver, preparation of, v, 348.
—, —, preparation of pure, xxiv, 370.
—, —, pure not blackened by sun's rays, xxxv, 298.
—, —, reduction of, xviii, 400.
—, of soda of Atacama, Peru, xii, 385.
—, —, of Tarapaca, A. A. Hayes, xxxviii, 410; xxxix, 375.