— — of New York, xl, 77.
— system, and its characteristic fossils, T. A. Conrad, xxxviii, 86.
— —, ibid, H. D. Rogers, xlvii, 145.
— fossils, in Indiana, xlvi, 296.
Silver, atomic weight of, xlvii, 189.
—, effect of terrestrial magnetism on the precipitation of, xvi, 262.
—, Gregory's method of obtaining, from the chloride, xlvi, 201.
—, reduction of the chloride of, xxviii, 145.
—, production of the discolored chloride of, Cavalier, xx, 193; xxi, 369.
—, chloride of, on the change of color, xx, 193; xxi, 369.