—, H. Davy's theory of, xvii, 239; xxxvi, 231.
—, Gay Lussac's views on, xxxvi, 233, 236.
—, G. Bischof on, xxxvi, 230, 239f; xxxvii, 41.f
—, —, theory of central heat satisfactory, xxxvi, 239; xxxvii, 52.
—, —, freshwater rivers contribute to the action of, xxxvi, 262.
—, C. Daubeny, in reply to G. Bischof, on the chemical theory of, xxxvii, 78.
—, L. von Buch, on certain volcanoes and volcanic phenomena, xxxvi, 260-273.
—, geographical distribution and phenomena of, J. L. Hayes, xlvii, 127.
—, mud, iv, 216.