actynoute. 13 It occurs massive, and in capillary crystals: the crys tals are sometimes elastic-flexible. * Internally the lustre is glistening and pearly. The fracture is scopiform fibrous, sometimes passing into radiated. The fragments are splintery and wedge-shaped. It occurs in distinct concretions, which are wedge- shaped, and promiscuously aggregated. It is opaque, or slightly translucent on the edges. It is soft. Tt is rather sectile. It is rather difficultly frangible. Specific gravity, 2.579, Kir wan. 2.809, Karslert. Chemical Characters. It melts with difficulty before the blowpipe, into a black or dark green coloured glass. Constituent Parts. Silica, - 47.0 Lime, 11.3 Magnesia, 7.3 Oxide of Iron, 20.0 Oxide of Manganese, 10.0 Loss, - - 4.4 100.0 Van quel in, in Hauy, t iv. p- 335. This is an analysis of the variety ot Asbestous Acty- nolite, named Byssolite by Saussure. Geos'iiosiic Situation. It occurs in beds in gneiss, mica-slate, and granular limestone, along with magnetic ironstone, iron-glance, iron-
