—, on the trap and sandstone of Connecticut, xlvii, 107.

—, natural polariscope, xlvii, 418.

—, analysis of waters of the Dead Sea, xlviii, 10.

—, analysis of the mud of New Haven harbor, xlviii, 337.

—, reply to C. U. Shepard on a notice of his Mineralogy, xlviii, 179.

—, notice of meteoric iron from Cambria, near Lockport, N. Y., xlviii, 388.f

Silliman, B. D., experiments on topaz, x, 352.

—, notice of an Aurora, xiv, 91.

Sillimanite, named, described and analyzed by G. T. Bowen, viii, 113.

—, notice of, viii, 195.