—, —, of Tarapaca, mode of refining, xliv, 7.

Nitre, origin of, xxviii, 292.

—, native, i, 146.

—, —, in caves of Kentucky and elsewhere, viii, 323.

—, —, in Africa, i, 147.

[Nitric acid,] on fuming, Mitscherlich, xx, 185.

— —, remarks on its solvent power on metals, Millon, xlvii, 191.

— —, J. Liebig's new test for, xvii, 176.

— —, ibid, J. W. Bailey, xxxii, 85.

— —, effect on sulphuretted hydrogen, viii, 375.