—, coins and medals, xxix, 157.
—, electricity, influence of, on capillary attraction, xxvi, 399.
—, elementary substance, change in, from exposure to the sun's rays, xlvi, 390.
—, idolatry and philosophy of the Zabians, xxviii, 201.
—, light, latent, xliv, 202.
—, tithonometer, xlvi, 217.f
Dreelite, analysis of, xxx, 380.
[Drift,] discussion on, at the Association of American geologists and naturalists, 1842, xliii, 151.
—, P. Dobson's views on the iceberg theory of, xlvi, 169.
—, J. L. Hayes, on the probable influence of icebergs on, xlv, 316, 326.