Haüy, R. J., biography of, viii, 362.
Hayes, A. A., on alumina with pigments, xvi, 173.
—, on a scarlet pigment, xvi, 174.
—, on bromine in the Saratoga waters, xviii, 142.
—, on pure chromate of potash, xx, 409.
—, on a singular crystallization, xx, 128.
—, on cobalt and nickel, xxi, 195.
—, analysis of Danaite, xxiv, 386; xxxvi, 334.
—, analysis of Ledererite, xxv, 80; xlvii, 339.
—, on native nitrate of soda, xxxix, 375.