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266' IRON. thick that they nearly form lying masses. A part of this deposition passes into Schwarzburg, as far as Pdnitz, and even reaches to Henneberg, where there are very exten sive ironworks. Further, it is found in very consider able quantity all around the Fichtelgebirge, and there are ironworks for smelting this ore, both on the Saxon and Bohemian sides, and in that part of it which be longs to Bayreuth. It occurs in beds in the Upper Pa latinate, and in Franconia. It is less abundant in the Hartz, where, at Iberg near Griin, the ochry brown ironstone occurs in putzenwerke in limestone. Very considerable mines of it are met with in Nassau, Hessia, and YVesterwald; and it also occurs in 'the Tyrol, Ca- rinthia, Stiria, Upper Italy, and in the southern pro vinces of France. It may be remarked, that northern countries, such as Sweden and Lapland, which possess so great an abun dance of magnetic ironstone and iron-glance, contain but small quantities of this species, which occurs so abundant ly in the Ilartz, Stiria, Garinthia, Hungary, Saxony* Westphalia, the county of Nassau, and other districts. 10. Umber. Argile ocreuse brun? Ilamj, t.iv. p. 446—Umbra, Rents, b.iv- s. 139—Umbra, Leonhard, Tabel. s. f>7. Id. Karsten, label, s. 66. Id. Haus. Handbuch, b. i. s. 276. External Characters. Its colour is clove-brown, which passes into blackish and yellowish brown. It occurs massive. Internally