8.ETIN-ASPHALT. 411 S. Retin-Asphalt, Hatchett. Retin-Asphalt, German. Retin-asphalt, Hatchett, in Phil. Trans, for 1804. Id. Kid, vol. li. p. g6,—Erdharze, Wagner, in Von Moll’s Ephemeriden der Berg und Hiittenkunde, b. iv. s. 20.—Retin-asphalt, Aikin, p. 68. External Characters. Its colours are yellowish-brown, reddish-brown, and sometimes inclining to ochre-yellow. It occurs massive, in angular pieces, and disseminated, Its lustre is glistening, and vitreo-resinous. The fracture is imperfect conchoidal. It is opaque. Jt is soft. It is brittle. Specific gravity, 1.13. Chemical Characters. When placed on a hot iron it melts, smokes, and burns with a bright flame, giving out a fragrant odour; it is so luble in potash, and partly so in spirit of wine. Constituent Parts Resin, - Asphalt, Earth, 100 Hatchett, Phil. Trans, for 1804. 55 - 42 3 Geognostic