—, in New Hampshire, v, 40; xvii, 357.
—, in New Jersey, v, 246; vi, 250.
—, in New York, iv, 37; v, 29; ix, 40, 251; xxi, 326.
—, in Pennsylvania, ix, 45; xiv, 5, 13.
—, in Virginia, v, 257.
—, slate, association with granite, in Massachusetts, and relative age, vi, 4.
—, —, varieties in the Connecticut valley, vi, 22.
—, —, minerals of, vi, 24.
—, —, in western Massachusetts, viii, 6, 240.