—, return from a tour to Russia, xlii, 213.
—, salt steppe south of Orenburg, Russia, xliv, 205.
—, freezing cavern, xliv, 205.
—, relation of American geology to Russian, xli, 208.
—, geological map of part of England and Wales, xxxv, 306.
—, Silurian system, xxxvi, 399; xxvii, 219.
Murchisonite, analysis of, xv, 386, [feldspar.]
Murexide, process for, xli, 46.
Muriate of lime, a native salt, xv, 242.
— of soda, see [Salt.]