—, constitution of the atmosphere during the coal era, xlvii, 105.
—, first Report on the Geology of Pennsylvania, noticed, xxxii, 192.
—, second Report on Geology of Pennsylvania, noticed, xxxiv, 188.
—, third Report, ibid, xxxvii, 380.
—, fifth Report, ibid, xli, 385.
—, origin of the Appalachian coal strata, xliii, 178.
—, structure of the Appalachian chain, xliii, 177; xliv, 359.
—, scratches, diluvial, in Pennsylvania, xliii, 180.
—, a new compound containing platinum, xxxix, 369.
Rogers, J. B., and J. Green, experiments with the elementary voltaic battery, xxviii, 33.