—, expansion of, on cooling, xxi, 371.
—, new sulphurets of, W. W. Mather, xxiv, 189, 196.
—, disulphuret of, W. W. Mather, xxvii, 264.
—, fusible alloy of, xxi, 371.
—, carbonate of, analysis of, xviii, 391.
— cobalt ore, analysis of, xiii, 187.
Bitter-spar, in Massachusetts, i, 137, 343; ii, 236.
—, in Maryland, v, 256.
—, in R. Island, iv, 285.
—, in Vermont, v, 272; xvii, 353.