—, bichromate of, ulcers produced by the use of, xvi, 384.
—, manganesiate of, F. Wöhler, xxviii, 137.
— and copper, sulphate of, xx, 195.
— and silica, new compound of, xvi, 397.
Potassium, atomic weight of, xlvii, 189.
—, preparation of, viii, 372.
—, best method of preparing and preserving, xix, 205.f
—, new apparatus for obtaining, L. D. Gale, xxi, 60.f
—, improvement in Brunner's process for, R. Hare, xxiv, 312.
—, an improved mode of obtaining, R. Hare, xxxviii, 338; xl, 27.