Alumina, use of, with pigments for the pallet, xvi, 173.
Aluminium, obtained by W. W. Mather, xx, 408.
—, characters of, F. Wöhler, xlix, 390.
—, chloride of, W. W. Mather, xxvii, 241, 248, 253.
Amalgam of gold, alembic for distilling, M. F. Maury, xxxiii, 66.f
Amber, vegetable origin of, ii, 353.
—, origin of, xxviii, 293.
—, Berendt on, xxxvii, 365.
—, from Ava, xxviii, 71.
—, from the Chesapeake and Delaware Canal, xvii, 292.