—, igneous theory of the earth, remarks on, xv, 384; xvi, 351.
—, on Mosaic geology, ix, 157.
—, passage to Mexico of, xv, 400.
—, memoir of, S. G. Morton, xlvii, 1.f
—, list of works of, xlvii, 16.
Maclurite, description of, v, 246.
—, analysis of, H. Seybert, v, 336.
—, identical with chondrodite, v, 366.
—, in New Jersey, v, 343.
Madeira, notice of, xxiv, 238.