366 BITUMINOUS FAMILY. It occurs massive, disseminated, globular, stalactitic, and with impressions. Internally it is shining and glistening, and the lustre is resinous. The principal fracture is curved slaty ; the cross frac ture is conchoidal. The fragments are indeterminately angular, and also slaty. It is translucent on the edges. It is shining in the streak. It is very soft. It is perfectly sectile. It is elastic flexible. It is light, verging on swimming. Specific gravity, from 0.9053 to 1.233, Hatchett. 0.930, La Metherie. 0.9021, Jordan. Constituent Parts. 100 Grains afforded the following products and educts: Carbonated Hydrogen, - 38 cubic inches. Carbonic Acid, - 4 Bituminous Oil, - - 73 grains. Acid Water, ... j ,50 Carbon, - <j.25 Lime, - 2.0 Silica, - - . . 1 50 Oxide of Iron, - . o.75 Sulphate of Lime, - . o.50 Alumina, ... q. 25 Klaproth, Beit, b iii. s. 112. Geognostic.