—, —, from the Upper Mississippi, J. W. Bailey, xli, 400.f
Pomeroy, S. W., remarks on the coal formation of Pennsylvania, xxi, 343.
Pompeii, how covered, iii, 374.
—, excavation of, iv, 384.
Pompton Mountains, N. J., rocks of, v, 241.
Pond, a fermenting, v, 199.
Ponton, M., on paper for photography, xxxvii, 361.
Poor, education of, iii, 379.
Popocatepetl, ascent of, xxviii, 220.
Population of France, xv, 397.