—, experiments on potassium and sodium, xxv, 90.
Dumas, J., on the determination of nitrogen in organic compounds, xxviii, 134.
Dumont's filter and prepared charcoal, xxiii, 346.f
Duncan, H., on the footprints of animals in sandstone in Scotland, xv, 84.
Dunn's Chinese collection at Philadelphia, xxxv, 391.
Durant, C. F., improvement of the barometer, xxvii, 97.f
Dwight, H. E., account of the Kaatskill mountains, ii, 11.
Dwight, Benj. W., facts illustrative of the powers and operations of the human mind in a diseased state, i, 431.
Dwight, S. E., on the eruption of Long lake and Mud lake, Vt., xi, 39.f
—, notice of a meteoric fireball, xiii, 35.