—, on bimalate of lime in sumach, xxvii, 294.
—, self-filling syphon, xxvii, 302.f
—, chlorine in meteoric iron, xliii, 169.
—, fossil footmarks, xliii, 173.
—, ores of zinc and lead in Virginia, xliii, 169.
—, oxide of tin in Virginia, xliii, 168.
—, on subterranean temperature, xliii, 176.
—, on the dip of strata, xliii, 171.
—, elevation and flexure of strata, theory of, xliv, 360.
—, proofs of diluvial agency, xliii, 181.