— Seybertite, T. G. Clemson, xxiv, 171.
— shells, W. B. Rogers, xxvi, 361.
— Sillimanite, G. T. Bowen, viii, 113.
— Sillimanite, xlvi, 382; xlviii, 219.
— —, T. Thomson, xlix, 396.
— Sismondine, M. Delesse, xlvii, 217.
— soda alum of Milo, C. U. Shepard, xvi, 203.
— spathic iron, T. G. Clemson, xxiv, 170.
— spodumene, Sweden, vii, 371.
— steatitic pseudomorphs, L. C. Beck, xlvi, 35.