—, geology of; trap and sandstone in junction at Wallingford, A. B. Chapin, xxvii, 104.f
—, —, trap rocks, B. Silliman, xvii, 119.
—, —, section from Killingly to Haddam, W. W. Mather, xxi, 94.f
—, —, report on, by C. U. Shepard, noticed, xxxiii, 151.
—, —, survey of, authorized, xxviii, 381.
—, ores of, see under names of the Metals.
— valley, rocks of, vii, 25.
— —, water courses and geology of, with account of terraces, ancient lakes, &c., xxii, 205.f
— —, geological account of, E. Hitchcock, vi, 1f, 201; vii, 1.f
— —, vertebral remains in sandstone of, E. Hitchcock, xxix, 330.