—, use of muriate of lime for, ix, 194.
Map of Maryland, 1835, xxx, 393; xxxii, 191.
— of mountains, iii, 364.
Maps, on contoured, Larcom, xlvi, 394.
—, a mode of illustrating criminal statistics by, xxxi, 379.
Mapping instrument, xx, 159.
Maranta arundinacea, v, 302.
Marble, Carrara, an altered oolite, xxx, 176.
—, and flagstones, strength of, E. Hodgkinson, xliv, 168.
—, durability of, as compared with granite, xv, 168.