— —, in the Stonybrook Mts., v, 29.
— —, serpentine, v, 29.
—, Potomac breccia, xxvi, 221; xxvii, 22.
—, of Maryland, xxvii, 24, 27.
— —, white, of Hagerstown, v, 264; xxvi, 222.
— in Kentucky, iii, 234.
— in Missouri, iii, 23.
—, yellow, of Tabriz, xxxvii, 355.
Marcet, F., influence of the moon on the weather, xxvii, 192.
—, boiling point in vessels of different materials, xlvii, 190.