Horns, manufactured articles from, xx, 394.
Hornblende, localities of, in Connecticut, x, 14.
—, —, in Massachusetts, vi, 226.
—, —, in New Hampshire, vi, 245; xviii, 129.
—, —, in New Jersey, v, 246; ix, 245.
—, —, in New York, ix, 40, 41, 251; xix, 226; xxi, 324.f
—, —, in Pennsylvania, xiv, 4, 17.
—, —, in R. Island, iv, 285.
— rocks, of western Massachusetts, viii, 9.
— slate, of the Connecticut valley, vi, 20.