EARTHY MAGNETIC IRONSTONE. Third Subspecies. Earthy Magnetic Ironstone. Ocliriger Magneteisenstein, Hausmann. Eisenschwarze, Schumacher, Verzeichniss der Dan. Mord. Mine- ralien, s. 135. Id. Reuss, b. iv. s. 53—Eisenmulm. Leonhard, Tabel. s. 69.—Fer oxydule fuligineux, Hamj, Tabl. p- 94. Erdiger Magneteisenstein, Haas. Handbucb, b. 1. s. 249. External Characters. Its colour is bluish-black. It occurs in blunt-edged rolled pieces, m winch the surface is sometimes vesicular. Internally it is dull, or feebly glimmering on spots. The fracture is fine-grained uneven, passing m o earthy. It is opaque. It is soft. It yields a black shining streak. It soils. It is sectile. 11 is easily frangible. It emits a faint clayey smell when breathed on. Specific gravity, 2.200, Schumacher. Geognostic and Geographic Situations. It occurs in the iron-mines of Arendal, and in the mine of Eiserfeld in Siegen. It appears to be common magnetic ironstone in a state of decomposition. -p , Observations